./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 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/verifythis/prefixsum_iter.c -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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:47:01,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:47:01,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:47:01,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:47:01,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:47:01,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:47:01,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:47:01,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:47:01,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:47:01,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:47:01,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:47:01,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:47:01,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:47:01,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:47:01,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:47:01,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:47:01,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:47:01,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:47:01,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:47:01,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:47:01,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:47:01,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:47:01,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:47:01,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:47:01,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:47:01,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:47:01,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:47:01,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:47:01,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:47:01,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:47:01,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:47:01,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:47:01,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:47:01,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:47:01,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:47:01,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:47:01,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:47:01,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:47:01,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:47:01,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:47:01,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:47:01,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 21:47:01,257 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:47:01,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:47:01,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:47:01,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:47:01,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:47:01,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:47:01,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:47:01,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:47:01,264 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:47:01,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:47:01,265 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:47:01,265 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 21:47:01,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:47:01,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:47:01,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:47:01,266 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 21:47:01,266 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 21:47:01,266 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 21:47:01,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:47:01,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 21:47:01,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:47:01,267 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:47:01,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:47:01,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:47:01,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:47:01,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:47:01,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:47:01,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:47:01,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:47:01,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:47:01,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:47:01,269 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:47:01,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:47:01,270 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:47:01,270 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-02-15 21:47:01,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:47:01,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:47:01,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:47:01,490 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:47:01,490 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:47:01,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-02-15 21:47:02,648 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:47:02,849 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:47:02,849 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-02-15 21:47:02,854 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab231bc1/8c76879e16d941e78d1eb9702a9e3f58/FLAGd9931db0f [2023-02-15 21:47:02,870 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab231bc1/8c76879e16d941e78d1eb9702a9e3f58 [2023-02-15 21:47:02,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:47:02,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:47:02,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:47:02,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:47:02,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:47:02,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:47:02" (1/1) ... [2023-02-15 21:47:02,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0ef653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:02, skipping insertion in model container [2023-02-15 21:47:02,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:47:02" (1/1) ... [2023-02-15 21:47:02,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:47:02,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:47:03,010 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-02-15 21:47:03,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:47:03,069 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:47:03,081 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-02-15 21:47:03,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:47:03,112 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:47:03,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03 WrapperNode [2023-02-15 21:47:03,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:47:03,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:47:03,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:47:03,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:47:03,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,143 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2023-02-15 21:47:03,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:47:03,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:47:03,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:47:03,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:47:03,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,177 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:47:03,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:47:03,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:47:03,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:47:03,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (1/1) ... [2023-02-15 21:47:03,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:47:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:03,209 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) [2023-02-15 21:47:03,236 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 [2023-02-15 21:47:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:47:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 21:47:03,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 21:47:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:47:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 21:47:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 21:47:03,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:47:03,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:47:03,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 21:47:03,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-02-15 21:47:03,257 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-02-15 21:47:03,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 21:47:03,367 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:47:03,369 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:47:03,775 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:47:03,781 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:47:03,782 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-15 21:47:03,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:47:03 BoogieIcfgContainer [2023-02-15 21:47:03,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:47:03,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:47:03,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:47:03,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:47:03,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:47:02" (1/3) ... [2023-02-15 21:47:03,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2605128d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:47:03, skipping insertion in model container [2023-02-15 21:47:03,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:47:03" (2/3) ... [2023-02-15 21:47:03,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2605128d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:47:03, skipping insertion in model container [2023-02-15 21:47:03,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:47:03" (3/3) ... [2023-02-15 21:47:03,793 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-02-15 21:47:03,809 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:47:03,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-02-15 21:47:03,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:47:03,872 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76a0d6ed, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:47:03,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-02-15 21:47:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:47:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:47:03,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:03,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:03,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1116940539, now seen corresponding path program 1 times [2023-02-15 21:47:03,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:03,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666303304] [2023-02-15 21:47:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:04,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666303304] [2023-02-15 21:47:04,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666303304] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:04,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:04,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 21:47:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077952728] [2023-02-15 21:47:04,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:04,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 21:47:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 21:47:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:47:04,229 INFO L87 Difference]: Start difference. First operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:47:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:04,285 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-02-15 21:47:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 21:47:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-15 21:47:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:04,293 INFO L225 Difference]: With dead ends: 102 [2023-02-15 21:47:04,293 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 21:47:04,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 21:47:04,297 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:04,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:47:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 21:47:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-15 21:47:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 93 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:47:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-02-15 21:47:04,330 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 29 [2023-02-15 21:47:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:04,331 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-02-15 21:47:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:47:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-02-15 21:47:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:47:04,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:04,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:47:04,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash 236420795, now seen corresponding path program 1 times [2023-02-15 21:47:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039534992] [2023-02-15 21:47:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:04,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:04,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:04,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039534992] [2023-02-15 21:47:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039534992] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:04,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:04,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:47:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330808637] [2023-02-15 21:47:04,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:04,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:47:04,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:47:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:47:04,657 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:04,802 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-02-15 21:47:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:47:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-02-15 21:47:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:04,804 INFO L225 Difference]: With dead ends: 98 [2023-02-15 21:47:04,804 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 21:47:04,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:04,806 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 153 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:04,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 155 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 21:47:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-15 21:47:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 91 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:47:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-15 21:47:04,814 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 29 [2023-02-15 21:47:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:04,816 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-15 21:47:04,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-15 21:47:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:47:04,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:04,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:04,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:47:04,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 236420796, now seen corresponding path program 1 times [2023-02-15 21:47:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:04,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000131883] [2023-02-15 21:47:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:05,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:05,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:05,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000131883] [2023-02-15 21:47:05,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000131883] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:05,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:05,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 21:47:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262484374] [2023-02-15 21:47:05,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:05,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:47:05,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:47:05,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:47:05,610 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:47:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:06,695 INFO L93 Difference]: Finished difference Result 260 states and 282 transitions. [2023-02-15 21:47:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:47:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-02-15 21:47:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:06,698 INFO L225 Difference]: With dead ends: 260 [2023-02-15 21:47:06,698 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 21:47:06,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:47:06,699 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 915 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:06,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 516 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:47:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 21:47:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2023-02-15 21:47:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.6728971962616823) internal successors, (179), 138 states have internal predecessors, (179), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2023-02-15 21:47:06,719 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 29 [2023-02-15 21:47:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:06,720 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2023-02-15 21:47:06,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:47:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2023-02-15 21:47:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 21:47:06,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:06,725 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 21:47:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 21:47:06,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889940, now seen corresponding path program 1 times [2023-02-15 21:47:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292457540] [2023-02-15 21:47:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:06,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:06,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:06,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292457540] [2023-02-15 21:47:06,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292457540] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:06,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:06,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:47:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135383045] [2023-02-15 21:47:06,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:47:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:47:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:47:06,829 INFO L87 Difference]: Start difference. First operand 148 states and 193 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:47:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:06,897 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2023-02-15 21:47:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:47:06,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-02-15 21:47:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:06,901 INFO L225 Difference]: With dead ends: 147 [2023-02-15 21:47:06,901 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 21:47:06,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:06,908 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:06,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 165 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 21:47:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-15 21:47:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.6542056074766356) internal successors, (177), 137 states have internal predecessors, (177), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2023-02-15 21:47:06,928 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2023-02-15 21:47:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:06,929 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2023-02-15 21:47:06,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:47:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2023-02-15 21:47:06,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 21:47:06,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:06,936 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 21:47:06,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:47:06,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889939, now seen corresponding path program 1 times [2023-02-15 21:47:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:06,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435086263] [2023-02-15 21:47:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:06,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:07,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:07,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435086263] [2023-02-15 21:47:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435086263] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:07,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:07,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:47:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606043814] [2023-02-15 21:47:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:47:07,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:47:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:47:07,169 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:07,572 INFO L93 Difference]: Finished difference Result 257 states and 334 transitions. [2023-02-15 21:47:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:47:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-02-15 21:47:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:07,574 INFO L225 Difference]: With dead ends: 257 [2023-02-15 21:47:07,574 INFO L226 Difference]: Without dead ends: 257 [2023-02-15 21:47:07,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:47:07,575 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 390 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:07,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 204 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:47:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-15 21:47:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 147. [2023-02-15 21:47:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.6388888888888888) internal successors, (177), 137 states have internal predecessors, (177), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2023-02-15 21:47:07,583 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2023-02-15 21:47:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:07,584 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2023-02-15 21:47:07,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2023-02-15 21:47:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 21:47:07,585 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:07,585 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 21:47:07,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 21:47:07,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1311333523, now seen corresponding path program 1 times [2023-02-15 21:47:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:07,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357874804] [2023-02-15 21:47:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:08,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:08,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:08,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:08,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357874804] [2023-02-15 21:47:08,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357874804] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:08,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620378546] [2023-02-15 21:47:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:08,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:08,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:08,049 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) [2023-02-15 21:47:08,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:47:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:47:08,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:08,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:47:08,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:47:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:47:08,692 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-15 21:47:08,705 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:47:08,706 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2023-02-15 21:47:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:47:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:11,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620378546] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:11,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:47:11,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2023-02-15 21:47:11,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746683074] [2023-02-15 21:47:11,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:11,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:47:11,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:47:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-02-15 21:47:11,285 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:47:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:12,833 INFO L93 Difference]: Finished difference Result 226 states and 273 transitions. [2023-02-15 21:47:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:47:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 30 [2023-02-15 21:47:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:12,835 INFO L225 Difference]: With dead ends: 226 [2023-02-15 21:47:12,835 INFO L226 Difference]: Without dead ends: 226 [2023-02-15 21:47:12,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 21:47:12,836 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 975 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:12,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 829 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 21:47:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-15 21:47:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 146. [2023-02-15 21:47:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 107 states have (on average 1.6261682242990654) internal successors, (174), 136 states have internal predecessors, (174), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 188 transitions. [2023-02-15 21:47:12,842 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 188 transitions. Word has length 30 [2023-02-15 21:47:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:12,842 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 188 transitions. [2023-02-15 21:47:12,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:47:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 188 transitions. [2023-02-15 21:47:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 21:47:12,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:12,843 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 21:47:12,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:13,044 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,SelfDestructingSolverStorable5 [2023-02-15 21:47:13,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash -535927024, now seen corresponding path program 1 times [2023-02-15 21:47:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:13,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685477463] [2023-02-15 21:47:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:13,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685477463] [2023-02-15 21:47:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685477463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:13,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:13,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:47:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816642715] [2023-02-15 21:47:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:47:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:47:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:13,120 INFO L87 Difference]: Start difference. First operand 146 states and 188 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:13,206 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2023-02-15 21:47:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:47:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-02-15 21:47:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:13,208 INFO L225 Difference]: With dead ends: 167 [2023-02-15 21:47:13,208 INFO L226 Difference]: Without dead ends: 167 [2023-02-15 21:47:13,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:47:13,209 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 181 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:13,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 419 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-15 21:47:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 140. [2023-02-15 21:47:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.5841584158415842) internal successors, (160), 130 states have internal predecessors, (160), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 174 transitions. [2023-02-15 21:47:13,219 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 174 transitions. Word has length 32 [2023-02-15 21:47:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:13,221 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 174 transitions. [2023-02-15 21:47:13,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 174 transitions. [2023-02-15 21:47:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 21:47:13,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:13,225 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-02-15 21:47:13,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 21:47:13,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash 566089799, now seen corresponding path program 1 times [2023-02-15 21:47:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:13,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435472725] [2023-02-15 21:47:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:13,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:13,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435472725] [2023-02-15 21:47:13,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435472725] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:13,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:13,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:47:13,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475761777] [2023-02-15 21:47:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:47:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:47:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:13,352 INFO L87 Difference]: Start difference. First operand 140 states and 174 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:13,463 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2023-02-15 21:47:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:47:13,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-02-15 21:47:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:13,466 INFO L225 Difference]: With dead ends: 134 [2023-02-15 21:47:13,466 INFO L226 Difference]: Without dead ends: 134 [2023-02-15 21:47:13,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:47:13,467 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 175 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:13,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 169 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-15 21:47:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-02-15 21:47:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 101 states have (on average 1.4653465346534653) internal successors, (148), 124 states have internal predecessors, (148), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2023-02-15 21:47:13,475 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 33 [2023-02-15 21:47:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:13,475 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2023-02-15 21:47:13,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2023-02-15 21:47:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 21:47:13,480 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:13,480 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-02-15 21:47:13,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 21:47:13,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash 566089800, now seen corresponding path program 1 times [2023-02-15 21:47:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:13,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568824436] [2023-02-15 21:47:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:13,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:47:13,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:13,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568824436] [2023-02-15 21:47:13,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568824436] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:13,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:13,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 21:47:13,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375434685] [2023-02-15 21:47:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:13,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:47:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:47:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:47:13,681 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:13,931 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2023-02-15 21:47:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:47:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-02-15 21:47:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:13,932 INFO L225 Difference]: With dead ends: 177 [2023-02-15 21:47:13,932 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 21:47:13,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:47:13,933 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 414 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:13,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 851 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 21:47:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 93. [2023-02-15 21:47:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 86 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:47:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2023-02-15 21:47:13,936 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 33 [2023-02-15 21:47:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:13,936 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2023-02-15 21:47:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2023-02-15 21:47:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 21:47:13,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:13,936 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 21:47:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 21:47:13,937 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1785256912, now seen corresponding path program 1 times [2023-02-15 21:47:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874333751] [2023-02-15 21:47:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:14,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:14,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:47:14,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:14,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874333751] [2023-02-15 21:47:14,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874333751] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:14,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072136776] [2023-02-15 21:47:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:14,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:14,136 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) [2023-02-15 21:47:14,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:47:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:47:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:14,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:14,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072136776] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:14,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:47:14,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 11] total 23 [2023-02-15 21:47:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013074296] [2023-02-15 21:47:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:47:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:47:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:47:14,738 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:14,964 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2023-02-15 21:47:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:47:14,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-02-15 21:47:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:14,966 INFO L225 Difference]: With dead ends: 171 [2023-02-15 21:47:14,966 INFO L226 Difference]: Without dead ends: 171 [2023-02-15 21:47:14,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2023-02-15 21:47:14,967 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 372 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:14,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 682 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-15 21:47:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 108. [2023-02-15 21:47:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 98 states have internal predecessors, (106), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2023-02-15 21:47:14,971 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 34 [2023-02-15 21:47:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:14,971 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2023-02-15 21:47:14,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:47:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2023-02-15 21:47:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 21:47:14,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:14,972 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-02-15 21:47:14,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:15,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 21:47:15,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash 450563161, now seen corresponding path program 1 times [2023-02-15 21:47:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356842366] [2023-02-15 21:47:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:15,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:15,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:15,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:15,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356842366] [2023-02-15 21:47:15,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356842366] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279217189] [2023-02-15 21:47:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:15,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:15,485 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) [2023-02-15 21:47:15,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:47:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 21:47:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:15,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:47:15,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:47:15,784 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 21:47:15,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 22 [2023-02-15 21:47:15,798 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:47:15,799 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2023-02-15 21:47:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:47:16,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279217189] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:18,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:47:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2023-02-15 21:47:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462126895] [2023-02-15 21:47:18,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:18,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 21:47:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 21:47:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-02-15 21:47:18,326 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:47:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:19,909 INFO L93 Difference]: Finished difference Result 236 states and 257 transitions. [2023-02-15 21:47:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:47:19,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2023-02-15 21:47:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:19,910 INFO L225 Difference]: With dead ends: 236 [2023-02-15 21:47:19,910 INFO L226 Difference]: Without dead ends: 236 [2023-02-15 21:47:19,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 21:47:19,912 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1856 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1857 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:19,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1857 Valid, 636 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:47:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-15 21:47:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 107. [2023-02-15 21:47:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.4) internal successors, (105), 97 states have internal predecessors, (105), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2023-02-15 21:47:19,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 35 [2023-02-15 21:47:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:19,916 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2023-02-15 21:47:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:47:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2023-02-15 21:47:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 21:47:19,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:19,917 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-15 21:47:19,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:20,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1082556080, now seen corresponding path program 1 times [2023-02-15 21:47:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403690351] [2023-02-15 21:47:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:20,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403690351] [2023-02-15 21:47:20,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403690351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351187] [2023-02-15 21:47:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:20,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:20,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:20,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:20,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:47:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 21:47:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:20,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-02-15 21:47:20,651 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-02-15 21:47:20,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 20 [2023-02-15 21:47:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:21,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:21,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:47:21,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-02-15 21:47:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167935488] [2023-02-15 21:47:21,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:21,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:47:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:47:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:47:21,355 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:22,220 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2023-02-15 21:47:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:47:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2023-02-15 21:47:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:22,221 INFO L225 Difference]: With dead ends: 107 [2023-02-15 21:47:22,221 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 21:47:22,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:47:22,222 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 465 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:22,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 221 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:47:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 21:47:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2023-02-15 21:47:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 93 states have internal predecessors, (101), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2023-02-15 21:47:22,226 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 36 [2023-02-15 21:47:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:22,226 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2023-02-15 21:47:22,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2023-02-15 21:47:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 21:47:22,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:22,227 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-02-15 21:47:22,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 21:47:22,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:22,432 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash 7143804, now seen corresponding path program 1 times [2023-02-15 21:47:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:22,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976147453] [2023-02-15 21:47:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:22,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976147453] [2023-02-15 21:47:22,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976147453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:22,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:47:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391959131] [2023-02-15 21:47:22,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:47:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:47:22,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:47:22,496 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:22,566 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-02-15 21:47:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:47:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-02-15 21:47:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:22,568 INFO L225 Difference]: With dead ends: 101 [2023-02-15 21:47:22,568 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 21:47:22,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:22,569 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:22,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 162 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 21:47:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2023-02-15 21:47:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 90 states have internal predecessors, (98), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2023-02-15 21:47:22,573 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 37 [2023-02-15 21:47:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:22,574 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2023-02-15 21:47:22,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2023-02-15 21:47:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 21:47:22,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:22,574 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-02-15 21:47:22,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 21:47:22,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash 7143805, now seen corresponding path program 1 times [2023-02-15 21:47:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:22,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151468465] [2023-02-15 21:47:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151468465] [2023-02-15 21:47:22,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151468465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325350255] [2023-02-15 21:47:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:22,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:22,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:22,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:22,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:47:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 21:47:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:22,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:22,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325350255] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:22,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2023-02-15 21:47:22,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339434128] [2023-02-15 21:47:22,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:22,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:47:22,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:47:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:47:22,811 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:22,919 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2023-02-15 21:47:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:47:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-02-15 21:47:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:22,921 INFO L225 Difference]: With dead ends: 159 [2023-02-15 21:47:22,921 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 21:47:22,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:47:22,921 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 213 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:22,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 480 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 21:47:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 107. [2023-02-15 21:47:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.325) internal successors, (106), 97 states have internal predecessors, (106), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2023-02-15 21:47:22,926 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 37 [2023-02-15 21:47:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:22,927 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2023-02-15 21:47:22,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2023-02-15 21:47:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 21:47:22,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:22,928 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:22,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 21:47:23,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash 221416284, now seen corresponding path program 1 times [2023-02-15 21:47:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:23,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292237848] [2023-02-15 21:47:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:23,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:23,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:23,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:23,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292237848] [2023-02-15 21:47:23,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292237848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361919522] [2023-02-15 21:47:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:23,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:23,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:23,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:23,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:47:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:23,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:47:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:23,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:23,769 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 25 [2023-02-15 21:47:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:23,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361919522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:23,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:23,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-02-15 21:47:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270067021] [2023-02-15 21:47:23,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 21:47:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 21:47:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2023-02-15 21:47:23,834 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:24,249 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2023-02-15 21:47:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:47:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-02-15 21:47:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:24,250 INFO L225 Difference]: With dead ends: 106 [2023-02-15 21:47:24,250 INFO L226 Difference]: Without dead ends: 106 [2023-02-15 21:47:24,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=971, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:47:24,251 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 573 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:24,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 230 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:47:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-15 21:47:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-15 21:47:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.3125) internal successors, (105), 96 states have internal predecessors, (105), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-02-15 21:47:24,253 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 38 [2023-02-15 21:47:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:24,253 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-02-15 21:47:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-02-15 21:47:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 21:47:24,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:24,254 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:24,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 21:47:24,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash -804107195, now seen corresponding path program 1 times [2023-02-15 21:47:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:24,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516075313] [2023-02-15 21:47:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:24,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:24,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:24,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:24,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:24,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516075313] [2023-02-15 21:47:24,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516075313] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:24,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459900866] [2023-02-15 21:47:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:24,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:24,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:24,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:47:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:24,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 21:47:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:24,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:24,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459900866] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:24,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:24,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2023-02-15 21:47:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147476519] [2023-02-15 21:47:24,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:47:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:47:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:47:24,778 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:24,915 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2023-02-15 21:47:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:47:24,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-02-15 21:47:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:24,917 INFO L225 Difference]: With dead ends: 200 [2023-02-15 21:47:24,917 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 21:47:24,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:47:24,918 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 234 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:24,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 661 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 21:47:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 113. [2023-02-15 21:47:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 103 states have internal predecessors, (113), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2023-02-15 21:47:24,924 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 42 [2023-02-15 21:47:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:24,924 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2023-02-15 21:47:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2023-02-15 21:47:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 21:47:24,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:24,926 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:24,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:25,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:25,131 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 842447236, now seen corresponding path program 1 times [2023-02-15 21:47:25,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:25,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859220261] [2023-02-15 21:47:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:25,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859220261] [2023-02-15 21:47:25,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859220261] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:25,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:25,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:47:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150965505] [2023-02-15 21:47:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:25,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:47:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:47:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:47:25,206 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:25,270 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2023-02-15 21:47:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:47:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-02-15 21:47:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:25,272 INFO L225 Difference]: With dead ends: 112 [2023-02-15 21:47:25,272 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 21:47:25,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:25,272 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 68 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:25,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 188 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 21:47:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-15 21:47:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 102 states have internal predecessors, (112), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2023-02-15 21:47:25,276 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 43 [2023-02-15 21:47:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:25,276 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2023-02-15 21:47:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2023-02-15 21:47:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 21:47:25,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:25,277 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 21:47:25,277 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 842447237, now seen corresponding path program 1 times [2023-02-15 21:47:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:25,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899685006] [2023-02-15 21:47:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:25,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899685006] [2023-02-15 21:47:25,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899685006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107458188] [2023-02-15 21:47:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:25,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:25,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:25,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:47:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:25,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 21:47:25,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:25,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:25,798 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2023-02-15 21:47:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:25,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107458188] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:25,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:25,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2023-02-15 21:47:25,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977553947] [2023-02-15 21:47:25,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:25,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 21:47:25,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 21:47:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:47:25,849 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:26,268 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2023-02-15 21:47:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 21:47:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-02-15 21:47:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:26,269 INFO L225 Difference]: With dead ends: 136 [2023-02-15 21:47:26,269 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 21:47:26,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:47:26,270 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 493 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:26,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 279 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:47:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 21:47:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2023-02-15 21:47:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 104 states have internal predecessors, (115), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 129 transitions. [2023-02-15 21:47:26,273 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 129 transitions. Word has length 43 [2023-02-15 21:47:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:26,273 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 129 transitions. [2023-02-15 21:47:26,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 129 transitions. [2023-02-15 21:47:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 21:47:26,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:26,274 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1] [2023-02-15 21:47:26,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 21:47:26,475 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 961258010, now seen corresponding path program 1 times [2023-02-15 21:47:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:26,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279232405] [2023-02-15 21:47:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:26,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:26,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:26,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:26,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279232405] [2023-02-15 21:47:26,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279232405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:26,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148313352] [2023-02-15 21:47:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:26,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:26,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:26,691 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:26,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:47:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:47:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:26,972 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2023-02-15 21:47:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:27,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148313352] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:27,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:27,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-02-15 21:47:27,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32595006] [2023-02-15 21:47:27,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:27,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 21:47:27,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 21:47:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-02-15 21:47:27,052 INFO L87 Difference]: Start difference. First operand 114 states and 129 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:27,785 INFO L93 Difference]: Finished difference Result 368 states and 404 transitions. [2023-02-15 21:47:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:47:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-02-15 21:47:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:27,787 INFO L225 Difference]: With dead ends: 368 [2023-02-15 21:47:27,787 INFO L226 Difference]: Without dead ends: 368 [2023-02-15 21:47:27,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:47:27,788 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1820 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:27,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1820 Valid, 721 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:47:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-15 21:47:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 126. [2023-02-15 21:47:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 116 states have internal predecessors, (135), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2023-02-15 21:47:27,794 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 43 [2023-02-15 21:47:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:27,794 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2023-02-15 21:47:27,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:47:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2023-02-15 21:47:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:47:27,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:27,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2023-02-15 21:47:27,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:27,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:28,000 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:28,000 INFO L85 PathProgramCache]: Analyzing trace with hash -265772755, now seen corresponding path program 1 times [2023-02-15 21:47:28,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:28,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003747893] [2023-02-15 21:47:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:28,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:28,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:28,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003747893] [2023-02-15 21:47:28,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003747893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178866638] [2023-02-15 21:47:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:28,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:28,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:28,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:47:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 21:47:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:28,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:28,555 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 21 [2023-02-15 21:47:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:28,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178866638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:28,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:28,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-02-15 21:47:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734286534] [2023-02-15 21:47:28,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 21:47:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 21:47:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:47:28,661 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:47:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:29,516 INFO L93 Difference]: Finished difference Result 316 states and 355 transitions. [2023-02-15 21:47:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:47:29,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2023-02-15 21:47:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:29,518 INFO L225 Difference]: With dead ends: 316 [2023-02-15 21:47:29,518 INFO L226 Difference]: Without dead ends: 316 [2023-02-15 21:47:29,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 21:47:29,519 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1085 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:29,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1085 Valid, 1089 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:47:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-15 21:47:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 126. [2023-02-15 21:47:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 116 states have internal predecessors, (134), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2023-02-15 21:47:29,529 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 44 [2023-02-15 21:47:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:29,529 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2023-02-15 21:47:29,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:47:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2023-02-15 21:47:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:47:29,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:29,531 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:29,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:29,737 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:29,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2137907964, now seen corresponding path program 1 times [2023-02-15 21:47:29,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24491013] [2023-02-15 21:47:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:29,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:29,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:29,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:29,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24491013] [2023-02-15 21:47:29,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24491013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682213771] [2023-02-15 21:47:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:29,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:29,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:29,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 21:47:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:29,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 21:47:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:29,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:30,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682213771] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:30,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-02-15 21:47:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648468927] [2023-02-15 21:47:30,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:30,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:47:30,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:47:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:47:30,014 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:30,158 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2023-02-15 21:47:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:47:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-02-15 21:47:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:30,159 INFO L225 Difference]: With dead ends: 136 [2023-02-15 21:47:30,159 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 21:47:30,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:47:30,160 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 173 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:30,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 387 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 21:47:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2023-02-15 21:47:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.303921568627451) internal successors, (133), 116 states have internal predecessors, (133), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2023-02-15 21:47:30,163 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 45 [2023-02-15 21:47:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:30,163 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2023-02-15 21:47:30,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2023-02-15 21:47:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 21:47:30,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:30,164 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:30,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:30,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 21:47:30,365 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1851808460, now seen corresponding path program 1 times [2023-02-15 21:47:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:30,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221992953] [2023-02-15 21:47:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:30,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221992953] [2023-02-15 21:47:30,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221992953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063467653] [2023-02-15 21:47:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:30,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:30,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:30,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 21:47:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 21:47:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:30,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:47:30,950 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 6 [2023-02-15 21:47:31,025 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:47:31,025 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2023-02-15 21:47:31,060 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_333 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_333))) is different from true [2023-02-15 21:47:31,069 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2023-02-15 21:47:31,107 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2023-02-15 21:47:31,161 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-15 21:47:31,221 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 14 [2023-02-15 21:47:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-15 21:47:31,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:49,359 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ (* |ULTIMATE.start_downsweep_~n#1| 4) |ULTIMATE.start_downsweep_~a#1.offset| (- 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2023-02-15 21:47:53,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063467653] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:53,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:47:53,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2023-02-15 21:47:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101675271] [2023-02-15 21:47:53,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 21:47:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 21:47:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=991, Unknown=41, NotChecked=130, Total=1260 [2023-02-15 21:47:53,600 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 31 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:47:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:55,632 INFO L93 Difference]: Finished difference Result 264 states and 291 transitions. [2023-02-15 21:47:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 21:47:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 46 [2023-02-15 21:47:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:55,634 INFO L225 Difference]: With dead ends: 264 [2023-02-15 21:47:55,634 INFO L226 Difference]: Without dead ends: 264 [2023-02-15 21:47:55,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=869, Invalid=4066, Unknown=43, NotChecked=278, Total=5256 [2023-02-15 21:47:55,636 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1660 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:55,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1661 Valid, 833 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1126 Invalid, 0 Unknown, 158 Unchecked, 0.5s Time] [2023-02-15 21:47:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-15 21:47:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 144. [2023-02-15 21:47:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 120 states have (on average 1.3083333333333333) internal successors, (157), 134 states have internal predecessors, (157), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2023-02-15 21:47:55,639 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 46 [2023-02-15 21:47:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:55,640 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2023-02-15 21:47:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:47:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2023-02-15 21:47:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:47:55,640 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:55,640 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:55,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 21:47:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 21:47:55,847 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491564, now seen corresponding path program 1 times [2023-02-15 21:47:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779749401] [2023-02-15 21:47:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:55,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:55,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:55,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779749401] [2023-02-15 21:47:55,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779749401] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:47:55,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:47:55,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:47:55,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123571281] [2023-02-15 21:47:55,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:47:55,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:47:55,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:47:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:47:55,915 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:55,969 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2023-02-15 21:47:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:47:55,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2023-02-15 21:47:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:55,970 INFO L225 Difference]: With dead ends: 143 [2023-02-15 21:47:55,970 INFO L226 Difference]: Without dead ends: 143 [2023-02-15 21:47:55,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:47:55,970 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 62 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:55,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 193 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:47:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-15 21:47:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-02-15 21:47:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.3) internal successors, (156), 133 states have internal predecessors, (156), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2023-02-15 21:47:55,974 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 47 [2023-02-15 21:47:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:55,975 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2023-02-15 21:47:55,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2023-02-15 21:47:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:47:55,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:55,980 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:55,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 21:47:55,980 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:55,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491565, now seen corresponding path program 1 times [2023-02-15 21:47:55,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:55,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486232762] [2023-02-15 21:47:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:55,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486232762] [2023-02-15 21:47:56,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486232762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137569118] [2023-02-15 21:47:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:56,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:56,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:56,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 21:47:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:47:56,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:56,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:56,384 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2023-02-15 21:47:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:56,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137569118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:56,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:56,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-02-15 21:47:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860769610] [2023-02-15 21:47:56,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:47:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:47:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:47:56,420 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 21:47:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:56,671 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2023-02-15 21:47:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:47:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2023-02-15 21:47:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:56,672 INFO L225 Difference]: With dead ends: 151 [2023-02-15 21:47:56,673 INFO L226 Difference]: Without dead ends: 151 [2023-02-15 21:47:56,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:47:56,673 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 222 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:56,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 319 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:47:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-15 21:47:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2023-02-15 21:47:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 124 states have (on average 1.2983870967741935) internal successors, (161), 137 states have internal predecessors, (161), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2023-02-15 21:47:56,679 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 47 [2023-02-15 21:47:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:56,679 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2023-02-15 21:47:56,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 21:47:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2023-02-15 21:47:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:47:56,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:56,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1] [2023-02-15 21:47:56,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:56,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-15 21:47:56,884 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2057054475, now seen corresponding path program 1 times [2023-02-15 21:47:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:56,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18095299] [2023-02-15 21:47:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:56,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:56,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:57,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:57,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18095299] [2023-02-15 21:47:57,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18095299] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:57,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577667984] [2023-02-15 21:47:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:57,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:57,012 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:57,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 21:47:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 21:47:57,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:57,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:57,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577667984] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:57,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:57,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-02-15 21:47:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310612620] [2023-02-15 21:47:57,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:57,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:47:57,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:47:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:47:57,234 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:57,504 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2023-02-15 21:47:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 21:47:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2023-02-15 21:47:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:57,510 INFO L225 Difference]: With dead ends: 216 [2023-02-15 21:47:57,510 INFO L226 Difference]: Without dead ends: 216 [2023-02-15 21:47:57,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:47:57,511 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 646 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:57,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 687 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:47:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-02-15 21:47:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 135. [2023-02-15 21:47:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 1.25) internal successors, (140), 125 states have internal predecessors, (140), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2023-02-15 21:47:57,522 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 47 [2023-02-15 21:47:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:57,522 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2023-02-15 21:47:57,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2023-02-15 21:47:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 21:47:57,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:57,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1] [2023-02-15 21:47:57,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:57,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:57,729 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2070871953, now seen corresponding path program 1 times [2023-02-15 21:47:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:57,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271276170] [2023-02-15 21:47:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:57,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271276170] [2023-02-15 21:47:57,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271276170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72242809] [2023-02-15 21:47:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:57,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:57,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:57,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:57,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 21:47:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:57,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:47:57,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:58,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:47:58,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72242809] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:58,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:58,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-02-15 21:47:58,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204549450] [2023-02-15 21:47:58,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:58,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 21:47:58,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 21:47:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-02-15 21:47:58,140 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:58,410 INFO L93 Difference]: Finished difference Result 243 states and 268 transitions. [2023-02-15 21:47:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:47:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-02-15 21:47:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:58,411 INFO L225 Difference]: With dead ends: 243 [2023-02-15 21:47:58,411 INFO L226 Difference]: Without dead ends: 243 [2023-02-15 21:47:58,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:47:58,412 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 517 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:58,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1087 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:47:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-15 21:47:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2023-02-15 21:47:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2408759124087592) internal successors, (170), 150 states have internal predecessors, (170), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2023-02-15 21:47:58,416 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 48 [2023-02-15 21:47:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:58,416 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2023-02-15 21:47:58,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2023-02-15 21:47:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 21:47:58,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:58,417 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:58,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:58,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 21:47:58,623 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1655469456, now seen corresponding path program 1 times [2023-02-15 21:47:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:58,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817040942] [2023-02-15 21:47:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:58,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:58,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:47:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:58,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:47:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:58,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:47:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:58,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:58,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817040942] [2023-02-15 21:47:58,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817040942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:58,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254839421] [2023-02-15 21:47:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:58,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:58,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:58,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 21:47:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:58,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 21:47:58,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:47:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254839421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:58,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:58,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2023-02-15 21:47:58,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221934130] [2023-02-15 21:47:58,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:58,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:47:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:47:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:47:58,953 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:59,075 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2023-02-15 21:47:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:47:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-02-15 21:47:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:59,076 INFO L225 Difference]: With dead ends: 177 [2023-02-15 21:47:59,076 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 21:47:59,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-02-15 21:47:59,077 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 104 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:59,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 561 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 21:47:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2023-02-15 21:47:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.232394366197183) internal successors, (175), 155 states have internal predecessors, (175), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 189 transitions. [2023-02-15 21:47:59,082 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 189 transitions. Word has length 51 [2023-02-15 21:47:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:59,082 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 189 transitions. [2023-02-15 21:47:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 189 transitions. [2023-02-15 21:47:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 21:47:59,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:59,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2023-02-15 21:47:59,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 21:47:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 21:47:59,288 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash 589144300, now seen corresponding path program 1 times [2023-02-15 21:47:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260446377] [2023-02-15 21:47:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:59,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:47:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:59,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:47:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:59,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:47:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:47:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:47:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:47:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260446377] [2023-02-15 21:47:59,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260446377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:47:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474490431] [2023-02-15 21:47:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:47:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:47:59,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:47:59,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 21:47:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:47:59,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 21:47:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:47:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:47:59,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:47:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:47:59,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474490431] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:47:59,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:47:59,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2023-02-15 21:47:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551765611] [2023-02-15 21:47:59,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:47:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:47:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:47:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:47:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:47:59,613 INFO L87 Difference]: Start difference. First operand 165 states and 189 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:47:59,774 INFO L93 Difference]: Finished difference Result 222 states and 244 transitions. [2023-02-15 21:47:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 21:47:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2023-02-15 21:47:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:47:59,775 INFO L225 Difference]: With dead ends: 222 [2023-02-15 21:47:59,775 INFO L226 Difference]: Without dead ends: 222 [2023-02-15 21:47:59,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:47:59,776 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 449 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:47:59,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 682 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:47:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-02-15 21:47:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 155. [2023-02-15 21:47:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 145 states have internal predecessors, (161), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:47:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2023-02-15 21:47:59,780 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 52 [2023-02-15 21:47:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:47:59,780 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2023-02-15 21:47:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:47:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2023-02-15 21:47:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 21:47:59,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:47:59,781 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:47:59,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 21:47:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 21:47:59,986 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:47:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:47:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1768212551, now seen corresponding path program 1 times [2023-02-15 21:47:59,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:47:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527498483] [2023-02-15 21:47:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:47:59,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:47:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:48:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:48:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:48:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527498483] [2023-02-15 21:48:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527498483] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:48:00,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:48:00,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:48:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878067179] [2023-02-15 21:48:00,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:48:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:48:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:48:00,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:48:00,042 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:00,103 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2023-02-15 21:48:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:48:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-02-15 21:48:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:00,106 INFO L225 Difference]: With dead ends: 154 [2023-02-15 21:48:00,106 INFO L226 Difference]: Without dead ends: 154 [2023-02-15 21:48:00,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:48:00,111 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 108 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:00,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:48:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-15 21:48:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-02-15 21:48:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 144 states have internal predecessors, (160), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:48:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2023-02-15 21:48:00,119 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 53 [2023-02-15 21:48:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:00,120 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2023-02-15 21:48:00,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2023-02-15 21:48:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 21:48:00,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:00,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-02-15 21:48:00,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 21:48:00,122 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1752861143, now seen corresponding path program 2 times [2023-02-15 21:48:00,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:00,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495051185] [2023-02-15 21:48:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:00,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:00,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495051185] [2023-02-15 21:48:00,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495051185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820060069] [2023-02-15 21:48:00,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:48:00,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:00,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:00,373 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:00,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 21:48:00,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:48:00,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:48:00,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:00,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:00,818 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 21 [2023-02-15 21:48:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:00,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820060069] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:00,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:00,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-02-15 21:48:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120637603] [2023-02-15 21:48:00,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 21:48:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 21:48:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-02-15 21:48:00,972 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:48:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:01,695 INFO L93 Difference]: Finished difference Result 278 states and 303 transitions. [2023-02-15 21:48:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:48:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 53 [2023-02-15 21:48:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:01,696 INFO L225 Difference]: With dead ends: 278 [2023-02-15 21:48:01,696 INFO L226 Difference]: Without dead ends: 278 [2023-02-15 21:48:01,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 21:48:01,697 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 964 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:01,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 1202 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:48:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-02-15 21:48:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 158. [2023-02-15 21:48:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 136 states have (on average 1.213235294117647) internal successors, (165), 148 states have internal predecessors, (165), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:48:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 179 transitions. [2023-02-15 21:48:01,701 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 179 transitions. Word has length 53 [2023-02-15 21:48:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:01,701 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 179 transitions. [2023-02-15 21:48:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:48:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 179 transitions. [2023-02-15 21:48:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 21:48:01,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:01,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-15 21:48:01,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 21:48:01,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:01,907 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1495879408, now seen corresponding path program 1 times [2023-02-15 21:48:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332101386] [2023-02-15 21:48:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:02,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:02,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:02,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332101386] [2023-02-15 21:48:02,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332101386] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:02,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016307089] [2023-02-15 21:48:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:02,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:02,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:02,232 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:02,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 21:48:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:02,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 21:48:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:02,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:02,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016307089] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:02,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:02,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 20 [2023-02-15 21:48:02,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805969462] [2023-02-15 21:48:02,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:02,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 21:48:02,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 21:48:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:48:02,844 INFO L87 Difference]: Start difference. First operand 158 states and 179 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 21:48:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:03,816 INFO L93 Difference]: Finished difference Result 412 states and 455 transitions. [2023-02-15 21:48:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 21:48:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2023-02-15 21:48:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:03,831 INFO L225 Difference]: With dead ends: 412 [2023-02-15 21:48:03,831 INFO L226 Difference]: Without dead ends: 412 [2023-02-15 21:48:03,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=1388, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 21:48:03,832 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1095 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:03,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 937 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:48:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-15 21:48:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 173. [2023-02-15 21:48:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1920529801324504) internal successors, (180), 163 states have internal predecessors, (180), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:48:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2023-02-15 21:48:03,840 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 54 [2023-02-15 21:48:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:03,840 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2023-02-15 21:48:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 21:48:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2023-02-15 21:48:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 21:48:03,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:03,842 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:48:03,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:04,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:04,048 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash -953582912, now seen corresponding path program 1 times [2023-02-15 21:48:04,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:04,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349144530] [2023-02-15 21:48:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:48:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:48:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:48:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:04,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:04,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349144530] [2023-02-15 21:48:04,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349144530] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:48:04,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:48:04,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:48:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9440576] [2023-02-15 21:48:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:48:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:48:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:48:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:48:04,115 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:48:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:04,165 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2023-02-15 21:48:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:48:04,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2023-02-15 21:48:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:04,167 INFO L225 Difference]: With dead ends: 172 [2023-02-15 21:48:04,167 INFO L226 Difference]: Without dead ends: 172 [2023-02-15 21:48:04,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:48:04,169 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 102 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:04,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 151 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:48:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-15 21:48:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2023-02-15 21:48:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 151 states have (on average 1.185430463576159) internal successors, (179), 162 states have internal predecessors, (179), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:48:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2023-02-15 21:48:04,180 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 56 [2023-02-15 21:48:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:04,181 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2023-02-15 21:48:04,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 21:48:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2023-02-15 21:48:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 21:48:04,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:04,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:48:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 21:48:04,182 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 841059847, now seen corresponding path program 1 times [2023-02-15 21:48:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427934919] [2023-02-15 21:48:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:04,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 21:48:04,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:04,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427934919] [2023-02-15 21:48:04,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427934919] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:48:04,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:48:04,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:48:04,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244168515] [2023-02-15 21:48:04,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:48:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:48:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:48:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:48:04,332 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:04,510 INFO L93 Difference]: Finished difference Result 225 states and 250 transitions. [2023-02-15 21:48:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:48:04,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2023-02-15 21:48:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:04,511 INFO L225 Difference]: With dead ends: 225 [2023-02-15 21:48:04,511 INFO L226 Difference]: Without dead ends: 225 [2023-02-15 21:48:04,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:48:04,512 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 226 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:04,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 331 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:48:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-15 21:48:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 178. [2023-02-15 21:48:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 157 states have (on average 1.1910828025477707) internal successors, (187), 168 states have internal predecessors, (187), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:48:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2023-02-15 21:48:04,515 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 56 [2023-02-15 21:48:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:04,516 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2023-02-15 21:48:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2023-02-15 21:48:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 21:48:04,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:04,518 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-02-15 21:48:04,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 21:48:04,518 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash 503701003, now seen corresponding path program 1 times [2023-02-15 21:48:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:04,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015100733] [2023-02-15 21:48:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:04,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:48:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:48:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:48:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:04,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015100733] [2023-02-15 21:48:04,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015100733] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:48:04,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:48:04,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:48:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146919297] [2023-02-15 21:48:04,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:48:04,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:48:04,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:48:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:48:04,645 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:04,744 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2023-02-15 21:48:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:48:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 57 [2023-02-15 21:48:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:04,745 INFO L225 Difference]: With dead ends: 177 [2023-02-15 21:48:04,745 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 21:48:04,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:48:04,746 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 154 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:04,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 144 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:48:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 21:48:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2023-02-15 21:48:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 167 states have internal predecessors, (186), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:48:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 200 transitions. [2023-02-15 21:48:04,750 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 200 transitions. Word has length 57 [2023-02-15 21:48:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:04,750 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 200 transitions. [2023-02-15 21:48:04,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 200 transitions. [2023-02-15 21:48:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:48:04,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:04,751 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-02-15 21:48:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 21:48:04,752 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1565137885, now seen corresponding path program 1 times [2023-02-15 21:48:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901819886] [2023-02-15 21:48:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 21:48:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 21:48:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 21:48:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:05,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:05,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901819886] [2023-02-15 21:48:05,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901819886] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:48:05,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:48:05,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:48:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377672902] [2023-02-15 21:48:05,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:48:05,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:48:05,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:48:05,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:48:05,041 INFO L87 Difference]: Start difference. First operand 177 states and 200 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:05,199 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2023-02-15 21:48:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:48:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2023-02-15 21:48:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:05,206 INFO L225 Difference]: With dead ends: 176 [2023-02-15 21:48:05,206 INFO L226 Difference]: Without dead ends: 135 [2023-02-15 21:48:05,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:48:05,207 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:05,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 254 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:48:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-15 21:48:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-02-15 21:48:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.218487394957983) internal successors, (145), 128 states have internal predecessors, (145), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2023-02-15 21:48:05,211 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 58 [2023-02-15 21:48:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:05,211 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2023-02-15 21:48:05,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:48:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2023-02-15 21:48:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:48:05,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:05,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:48:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-15 21:48:05,212 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 804662856, now seen corresponding path program 1 times [2023-02-15 21:48:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:05,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481165013] [2023-02-15 21:48:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:05,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481165013] [2023-02-15 21:48:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481165013] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809940152] [2023-02-15 21:48:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:05,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:05,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:05,585 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 21:48:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 21:48:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:06,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:06,246 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 38 [2023-02-15 21:48:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:06,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809940152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:06,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:06,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2023-02-15 21:48:06,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481433626] [2023-02-15 21:48:06,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:06,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 21:48:06,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 21:48:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 21:48:06,667 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 40 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:48:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:09,116 INFO L93 Difference]: Finished difference Result 400 states and 446 transitions. [2023-02-15 21:48:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 21:48:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2023-02-15 21:48:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:09,118 INFO L225 Difference]: With dead ends: 400 [2023-02-15 21:48:09,118 INFO L226 Difference]: Without dead ends: 400 [2023-02-15 21:48:09,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1026, Invalid=3804, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 21:48:09,120 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1501 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:09,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 1123 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:48:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-02-15 21:48:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 162. [2023-02-15 21:48:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 147 states have (on average 1.2448979591836735) internal successors, (183), 155 states have internal predecessors, (183), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2023-02-15 21:48:09,125 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 58 [2023-02-15 21:48:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:09,125 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2023-02-15 21:48:09,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.8205128205128207) internal successors, (110), 39 states have internal predecessors, (110), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:48:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2023-02-15 21:48:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:48:09,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:09,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1] [2023-02-15 21:48:09,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:09,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 21:48:09,332 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -226038058, now seen corresponding path program 2 times [2023-02-15 21:48:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:09,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687851175] [2023-02-15 21:48:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:09,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:09,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:09,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687851175] [2023-02-15 21:48:09,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687851175] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:09,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115514548] [2023-02-15 21:48:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:48:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:09,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:09,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 21:48:09,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:48:09,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:09,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 21:48:09,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:09,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:10,188 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2023-02-15 21:48:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115514548] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:10,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:10,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2023-02-15 21:48:10,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136252354] [2023-02-15 21:48:10,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 21:48:10,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 21:48:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-02-15 21:48:10,256 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:48:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:11,341 INFO L93 Difference]: Finished difference Result 306 states and 348 transitions. [2023-02-15 21:48:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:48:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2023-02-15 21:48:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:11,343 INFO L225 Difference]: With dead ends: 306 [2023-02-15 21:48:11,343 INFO L226 Difference]: Without dead ends: 306 [2023-02-15 21:48:11,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:48:11,344 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 538 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:11,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1040 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:48:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-15 21:48:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 163. [2023-02-15 21:48:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 156 states have internal predecessors, (184), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2023-02-15 21:48:11,348 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 59 [2023-02-15 21:48:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:11,349 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2023-02-15 21:48:11,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:48:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2023-02-15 21:48:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 21:48:11,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:11,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:48:11,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:11,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 21:48:11,555 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:11,555 INFO L85 PathProgramCache]: Analyzing trace with hash -812323954, now seen corresponding path program 1 times [2023-02-15 21:48:11,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:11,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073075222] [2023-02-15 21:48:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:11,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:11,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:11,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:11,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:11,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:11,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073075222] [2023-02-15 21:48:11,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073075222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:11,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989231575] [2023-02-15 21:48:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:11,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:11,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:11,722 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:11,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 21:48:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 21:48:11,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:48:11,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 21:48:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989231575] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:48:11,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 21:48:11,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 12 [2023-02-15 21:48:11,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309793920] [2023-02-15 21:48:11,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:48:11,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:48:11,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:48:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:48:11,874 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:11,931 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2023-02-15 21:48:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:48:11,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2023-02-15 21:48:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:11,932 INFO L225 Difference]: With dead ends: 167 [2023-02-15 21:48:11,933 INFO L226 Difference]: Without dead ends: 167 [2023-02-15 21:48:11,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:48:11,933 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 131 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:11,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 263 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:48:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-15 21:48:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-02-15 21:48:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 150 states have (on average 1.24) internal successors, (186), 158 states have internal predecessors, (186), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 194 transitions. [2023-02-15 21:48:11,937 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 194 transitions. Word has length 60 [2023-02-15 21:48:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:11,937 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 194 transitions. [2023-02-15 21:48:11,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 194 transitions. [2023-02-15 21:48:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 21:48:11,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:11,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2023-02-15 21:48:11,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:12,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 21:48:12,144 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 563297452, now seen corresponding path program 2 times [2023-02-15 21:48:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881895799] [2023-02-15 21:48:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:12,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:12,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 21:48:12,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881895799] [2023-02-15 21:48:12,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881895799] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232531095] [2023-02-15 21:48:12,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:48:12,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:12,259 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:12,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 21:48:12,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:48:12,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:12,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 21:48:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:12,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:12,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232531095] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:12,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:12,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2023-02-15 21:48:12,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253407822] [2023-02-15 21:48:12,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:12,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:48:12,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:48:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:48:12,586 INFO L87 Difference]: Start difference. First operand 165 states and 194 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:12,942 INFO L93 Difference]: Finished difference Result 214 states and 244 transitions. [2023-02-15 21:48:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 21:48:12,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-02-15 21:48:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:12,943 INFO L225 Difference]: With dead ends: 214 [2023-02-15 21:48:12,943 INFO L226 Difference]: Without dead ends: 214 [2023-02-15 21:48:12,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:48:12,944 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 451 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:12,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 771 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:48:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-15 21:48:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 165. [2023-02-15 21:48:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 150 states have (on average 1.2333333333333334) internal successors, (185), 158 states have internal predecessors, (185), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 193 transitions. [2023-02-15 21:48:12,950 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 193 transitions. Word has length 62 [2023-02-15 21:48:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:12,951 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 193 transitions. [2023-02-15 21:48:12,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 193 transitions. [2023-02-15 21:48:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 21:48:12,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:12,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 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] [2023-02-15 21:48:12,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:13,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:13,157 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1697403066, now seen corresponding path program 3 times [2023-02-15 21:48:13,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:13,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070077719] [2023-02-15 21:48:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:13,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:13,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:13,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:13,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:13,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070077719] [2023-02-15 21:48:13,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070077719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894034054] [2023-02-15 21:48:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:48:13,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:13,351 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:13,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 21:48:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 21:48:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 21:48:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 21:48:13,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 21:48:13,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894034054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:13,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:13,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-02-15 21:48:13,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662704127] [2023-02-15 21:48:13,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:13,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 21:48:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 21:48:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:48:13,975 INFO L87 Difference]: Start difference. First operand 165 states and 193 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:15,136 INFO L93 Difference]: Finished difference Result 327 states and 377 transitions. [2023-02-15 21:48:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 21:48:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-02-15 21:48:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:15,137 INFO L225 Difference]: With dead ends: 327 [2023-02-15 21:48:15,138 INFO L226 Difference]: Without dead ends: 327 [2023-02-15 21:48:15,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=675, Invalid=2747, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:48:15,139 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 911 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:15,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 468 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:48:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-15 21:48:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 178. [2023-02-15 21:48:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 163 states have (on average 1.2024539877300613) internal successors, (196), 171 states have internal predecessors, (196), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2023-02-15 21:48:15,143 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 63 [2023-02-15 21:48:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:15,143 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2023-02-15 21:48:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2023-02-15 21:48:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 21:48:15,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:15,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:48:15,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-15 21:48:15,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 21:48:15,351 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1085543347, now seen corresponding path program 1 times [2023-02-15 21:48:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:15,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951483407] [2023-02-15 21:48:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:15,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:15,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:15,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:15,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951483407] [2023-02-15 21:48:15,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951483407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209077254] [2023-02-15 21:48:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:15,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:15,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:15,532 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:15,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 21:48:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:48:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:15,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:15,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209077254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:15,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:15,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2023-02-15 21:48:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969411603] [2023-02-15 21:48:15,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:15,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 21:48:15,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 21:48:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:48:15,809 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:16,036 INFO L93 Difference]: Finished difference Result 189 states and 214 transitions. [2023-02-15 21:48:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:48:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-02-15 21:48:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:16,037 INFO L225 Difference]: With dead ends: 189 [2023-02-15 21:48:16,037 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 21:48:16,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:48:16,038 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 206 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:16,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 325 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:48:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 21:48:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 180. [2023-02-15 21:48:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 1.2) internal successors, (198), 173 states have internal predecessors, (198), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2023-02-15 21:48:16,052 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 63 [2023-02-15 21:48:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:16,052 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2023-02-15 21:48:16,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2023-02-15 21:48:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 21:48:16,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:16,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:48:16,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:16,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-15 21:48:16,259 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash -593864845, now seen corresponding path program 1 times [2023-02-15 21:48:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:16,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513798442] [2023-02-15 21:48:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:16,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:16,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513798442] [2023-02-15 21:48:16,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513798442] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137424781] [2023-02-15 21:48:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:16,418 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:16,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 21:48:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:48:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:16,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:48:16,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137424781] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:16,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2023-02-15 21:48:16,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357373343] [2023-02-15 21:48:16,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:16,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 21:48:16,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 21:48:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:48:16,745 INFO L87 Difference]: Start difference. First operand 180 states and 206 transitions. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 18 states have internal predecessors, (112), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:16,998 INFO L93 Difference]: Finished difference Result 220 states and 249 transitions. [2023-02-15 21:48:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:48:16,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 18 states have internal predecessors, (112), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2023-02-15 21:48:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:16,999 INFO L225 Difference]: With dead ends: 220 [2023-02-15 21:48:16,999 INFO L226 Difference]: Without dead ends: 220 [2023-02-15 21:48:17,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:48:17,000 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 172 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:17,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 675 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:48:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-02-15 21:48:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 198. [2023-02-15 21:48:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 183 states have (on average 1.1912568306010929) internal successors, (218), 191 states have internal predecessors, (218), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 226 transitions. [2023-02-15 21:48:17,004 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 226 transitions. Word has length 65 [2023-02-15 21:48:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:17,011 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 226 transitions. [2023-02-15 21:48:17,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 18 states have internal predecessors, (112), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 226 transitions. [2023-02-15 21:48:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 21:48:17,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:17,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 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, 1] [2023-02-15 21:48:17,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:17,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-15 21:48:17,224 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1577858453, now seen corresponding path program 3 times [2023-02-15 21:48:17,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895511486] [2023-02-15 21:48:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:17,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:17,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:17,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:48:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895511486] [2023-02-15 21:48:17,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895511486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:17,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956382719] [2023-02-15 21:48:17,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:48:17,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:17,500 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:17,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 21:48:17,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 21:48:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 21:48:17,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:48:18,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:18,507 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2023-02-15 21:48:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:48:18,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956382719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:18,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:18,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-02-15 21:48:18,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044291817] [2023-02-15 21:48:18,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:18,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 21:48:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 21:48:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:48:18,738 INFO L87 Difference]: Start difference. First operand 198 states and 226 transitions. Second operand has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 21:48:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:21,178 INFO L93 Difference]: Finished difference Result 319 states and 356 transitions. [2023-02-15 21:48:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 21:48:21,178 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 67 [2023-02-15 21:48:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:21,180 INFO L225 Difference]: With dead ends: 319 [2023-02-15 21:48:21,180 INFO L226 Difference]: Without dead ends: 319 [2023-02-15 21:48:21,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1061, Invalid=3631, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 21:48:21,181 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 1863 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:21,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1863 Valid, 856 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:48:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-15 21:48:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 200. [2023-02-15 21:48:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 185 states have (on average 1.1891891891891893) internal successors, (220), 193 states have internal predecessors, (220), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2023-02-15 21:48:21,185 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 67 [2023-02-15 21:48:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:21,186 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2023-02-15 21:48:21,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 35 states have internal predecessors, (112), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 21:48:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2023-02-15 21:48:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 21:48:21,187 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:21,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2023-02-15 21:48:21,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:21,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:21,392 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash -115220690, now seen corresponding path program 4 times [2023-02-15 21:48:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:21,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962462106] [2023-02-15 21:48:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:21,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:21,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:48:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962462106] [2023-02-15 21:48:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962462106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493485142] [2023-02-15 21:48:21,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:48:21,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:21,576 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:21,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 21:48:21,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:48:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 21:48:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:48:21,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:48:21,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493485142] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:21,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:21,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2023-02-15 21:48:21,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856575388] [2023-02-15 21:48:21,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:21,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 21:48:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 21:48:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:48:21,976 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:22,306 INFO L93 Difference]: Finished difference Result 358 states and 406 transitions. [2023-02-15 21:48:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:48:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-02-15 21:48:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:22,307 INFO L225 Difference]: With dead ends: 358 [2023-02-15 21:48:22,307 INFO L226 Difference]: Without dead ends: 358 [2023-02-15 21:48:22,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:48:22,308 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 842 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:22,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1007 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:48:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-02-15 21:48:22,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 218. [2023-02-15 21:48:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 203 states have (on average 1.1970443349753694) internal successors, (243), 211 states have internal predecessors, (243), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2023-02-15 21:48:22,312 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 72 [2023-02-15 21:48:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:22,312 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2023-02-15 21:48:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:48:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2023-02-15 21:48:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 21:48:22,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:22,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 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] [2023-02-15 21:48:22,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:22,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:22,523 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2098065761, now seen corresponding path program 1 times [2023-02-15 21:48:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:22,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213099958] [2023-02-15 21:48:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:24,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:24,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:24,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:48:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213099958] [2023-02-15 21:48:24,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213099958] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889910069] [2023-02-15 21:48:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:24,629 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:24,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 21:48:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-15 21:48:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:25,193 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-15 21:48:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 21:48:25,493 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-02-15 21:48:25,600 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 21:48:25,697 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 21:48:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:48:25,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:48:25,855 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 32 [2023-02-15 21:48:26,263 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2023-02-15 21:48:26,266 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 24 [2023-02-15 21:48:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:48:26,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889910069] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:48:26,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:48:26,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 21] total 64 [2023-02-15 21:48:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558694871] [2023-02-15 21:48:26,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:48:26,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 21:48:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:48:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 21:48:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3807, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 21:48:26,737 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 64 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 21:48:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:48:38,928 INFO L93 Difference]: Finished difference Result 298 states and 334 transitions. [2023-02-15 21:48:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-15 21:48:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 72 [2023-02-15 21:48:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:48:38,931 INFO L225 Difference]: With dead ends: 298 [2023-02-15 21:48:38,931 INFO L226 Difference]: Without dead ends: 298 [2023-02-15 21:48:38,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3261 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1640, Invalid=13612, Unknown=0, NotChecked=0, Total=15252 [2023-02-15 21:48:38,950 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1319 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:48:38,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 1001 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-15 21:48:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-15 21:48:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2023-02-15 21:48:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 216 states have internal predecessors, (248), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:48:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 256 transitions. [2023-02-15 21:48:38,954 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 256 transitions. Word has length 72 [2023-02-15 21:48:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:48:38,955 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 256 transitions. [2023-02-15 21:48:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 21:48:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 256 transitions. [2023-02-15 21:48:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:48:38,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:48:38,956 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 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] [2023-02-15 21:48:38,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 21:48:39,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:39,156 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:48:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:48:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1854390861, now seen corresponding path program 3 times [2023-02-15 21:48:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:48:39,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221923096] [2023-02-15 21:48:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:48:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:48:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:39,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:48:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:39,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:48:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:39,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:48:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:39,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:48:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:48:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:48:39,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:48:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221923096] [2023-02-15 21:48:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221923096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:48:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337197660] [2023-02-15 21:48:39,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:48:39,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:48:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:48:39,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:48:39,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 21:48:39,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 21:48:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:48:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 21:48:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:48:39,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:48:39,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-02-15 21:48:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 21:48:42,117 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-02-15 21:48:42,127 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:48:42,127 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2023-02-15 21:49:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 21:49:07,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:49:07,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337197660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:49:07,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:49:07,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2023-02-15 21:49:07,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132024936] [2023-02-15 21:49:07,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:49:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 21:49:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:49:07,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 21:49:07,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1917, Unknown=12, NotChecked=0, Total=2162 [2023-02-15 21:49:07,870 INFO L87 Difference]: Start difference. First operand 223 states and 256 transitions. Second operand has 35 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:49:10,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:49:14,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:49:16,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:49:17,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:49:24,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 21:50:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:26,524 INFO L93 Difference]: Finished difference Result 370 states and 418 transitions. [2023-02-15 21:50:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 21:50:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2023-02-15 21:50:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:26,526 INFO L225 Difference]: With dead ends: 370 [2023-02-15 21:50:26,527 INFO L226 Difference]: Without dead ends: 370 [2023-02-15 21:50:26,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 91.4s TimeCoverageRelationStatistics Valid=1218, Invalid=4926, Unknown=18, NotChecked=0, Total=6162 [2023-02-15 21:50:26,528 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 877 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 14 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:26,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 1044 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1889 Invalid, 8 Unknown, 0 Unchecked, 13.1s Time] [2023-02-15 21:50:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-02-15 21:50:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 231. [2023-02-15 21:50:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 215 states have (on average 1.1906976744186046) internal successors, (256), 223 states have internal predecessors, (256), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:50:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 264 transitions. [2023-02-15 21:50:26,534 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 264 transitions. Word has length 74 [2023-02-15 21:50:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:26,534 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 264 transitions. [2023-02-15 21:50:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.0625) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:50:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 264 transitions. [2023-02-15 21:50:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:50:26,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:26,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2023-02-15 21:50:26,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-15 21:50:26,742 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:50:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash 940594451, now seen corresponding path program 1 times [2023-02-15 21:50:26,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:26,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202470758] [2023-02-15 21:50:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:50:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:50:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:50:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:50:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:50:26,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:26,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202470758] [2023-02-15 21:50:26,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202470758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650271266] [2023-02-15 21:50:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:26,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:26,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:26,937 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:50:26,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 21:50:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:27,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 21:50:27,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:50:27,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:50:27,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650271266] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:27,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:27,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 19 [2023-02-15 21:50:27,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138927642] [2023-02-15 21:50:27,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:27,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 21:50:27,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 21:50:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-02-15 21:50:27,283 INFO L87 Difference]: Start difference. First operand 231 states and 264 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:50:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:27,706 INFO L93 Difference]: Finished difference Result 329 states and 366 transitions. [2023-02-15 21:50:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 21:50:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2023-02-15 21:50:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:27,707 INFO L225 Difference]: With dead ends: 329 [2023-02-15 21:50:27,707 INFO L226 Difference]: Without dead ends: 329 [2023-02-15 21:50:27,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:50:27,707 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 467 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:27,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 935 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:50:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-15 21:50:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 223. [2023-02-15 21:50:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 207 states have (on average 1.178743961352657) internal successors, (244), 215 states have internal predecessors, (244), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:50:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 252 transitions. [2023-02-15 21:50:27,713 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 252 transitions. Word has length 74 [2023-02-15 21:50:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:27,714 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 252 transitions. [2023-02-15 21:50:27,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 18 states have internal predecessors, (97), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:50:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 252 transitions. [2023-02-15 21:50:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-15 21:50:27,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:27,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2023-02-15 21:50:27,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:27,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 21:50:27,922 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:50:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1833874459, now seen corresponding path program 1 times [2023-02-15 21:50:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043300466] [2023-02-15 21:50:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:50:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:50:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:50:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:50:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:50:28,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:28,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043300466] [2023-02-15 21:50:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043300466] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895540751] [2023-02-15 21:50:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:28,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:28,321 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:50:28,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 21:50:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:28,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 21:50:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:50:28,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:28,815 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 21 [2023-02-15 21:50:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:50:28,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895540751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:28,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:28,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-02-15 21:50:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669946867] [2023-02-15 21:50:28,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 21:50:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 21:50:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2023-02-15 21:50:28,926 INFO L87 Difference]: Start difference. First operand 223 states and 252 transitions. Second operand has 29 states, 28 states have (on average 6.035714285714286) internal successors, (169), 28 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:50:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:29,351 INFO L93 Difference]: Finished difference Result 238 states and 266 transitions. [2023-02-15 21:50:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:50:29,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.035714285714286) internal successors, (169), 28 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 77 [2023-02-15 21:50:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:29,353 INFO L225 Difference]: With dead ends: 238 [2023-02-15 21:50:29,353 INFO L226 Difference]: Without dead ends: 238 [2023-02-15 21:50:29,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 21:50:29,354 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 581 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:29,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 269 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:50:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-02-15 21:50:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 227. [2023-02-15 21:50:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 211 states have (on average 1.1753554502369667) internal successors, (248), 219 states have internal predecessors, (248), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:50:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2023-02-15 21:50:29,358 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 77 [2023-02-15 21:50:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:29,358 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2023-02-15 21:50:29,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.035714285714286) internal successors, (169), 28 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 21:50:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2023-02-15 21:50:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-15 21:50:29,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:29,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 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] [2023-02-15 21:50:29,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:29,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:29,566 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:50:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash 502891894, now seen corresponding path program 4 times [2023-02-15 21:50:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:29,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593073680] [2023-02-15 21:50:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:29,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:50:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:50:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:50:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:29,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:50:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 24 proven. 81 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:50:29,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:29,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593073680] [2023-02-15 21:50:29,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593073680] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990533279] [2023-02-15 21:50:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:50:29,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:29,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:29,827 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:50:29,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 21:50:29,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:50:29,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 21:50:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:50:30,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:50:30,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990533279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:30,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:30,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2023-02-15 21:50:30,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894520496] [2023-02-15 21:50:30,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:30,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 21:50:30,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 21:50:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:50:30,281 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 26 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:50:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:31,170 INFO L93 Difference]: Finished difference Result 518 states and 589 transitions. [2023-02-15 21:50:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 21:50:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 26 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2023-02-15 21:50:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:31,172 INFO L225 Difference]: With dead ends: 518 [2023-02-15 21:50:31,172 INFO L226 Difference]: Without dead ends: 518 [2023-02-15 21:50:31,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 21:50:31,173 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1226 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:31,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 1270 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:50:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-02-15 21:50:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 288. [2023-02-15 21:50:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 272 states have (on average 1.1911764705882353) internal successors, (324), 280 states have internal predecessors, (324), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:50:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2023-02-15 21:50:31,179 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 79 [2023-02-15 21:50:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:31,179 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2023-02-15 21:50:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 26 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:50:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2023-02-15 21:50:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 21:50:31,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:31,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:50:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:31,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-15 21:50:31,387 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:50:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1469686422, now seen corresponding path program 2 times [2023-02-15 21:50:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:31,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266456320] [2023-02-15 21:50:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:50:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:50:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:50:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:50:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 21:50:31,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266456320] [2023-02-15 21:50:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266456320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:31,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40585653] [2023-02-15 21:50:31,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:50:31,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:31,505 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:50:31,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 21:50:31,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:50:31,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:50:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:50:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 21:50:31,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:50:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 21:50:31,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40585653] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:50:31,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:50:31,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-02-15 21:50:31,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719997294] [2023-02-15 21:50:31,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:50:31,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 21:50:31,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:50:31,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 21:50:31,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-15 21:50:31,890 INFO L87 Difference]: Start difference. First operand 288 states and 332 transitions. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 17 states have internal predecessors, (105), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:50:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:50:32,217 INFO L93 Difference]: Finished difference Result 308 states and 347 transitions. [2023-02-15 21:50:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:50:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 17 states have internal predecessors, (105), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2023-02-15 21:50:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:50:32,219 INFO L225 Difference]: With dead ends: 308 [2023-02-15 21:50:32,219 INFO L226 Difference]: Without dead ends: 308 [2023-02-15 21:50:32,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2023-02-15 21:50:32,219 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 367 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:50:32,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 722 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:50:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-02-15 21:50:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 288. [2023-02-15 21:50:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 272 states have (on average 1.1801470588235294) internal successors, (321), 280 states have internal predecessors, (321), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:50:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 329 transitions. [2023-02-15 21:50:32,225 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 329 transitions. Word has length 80 [2023-02-15 21:50:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:50:32,225 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 329 transitions. [2023-02-15 21:50:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 17 states have internal predecessors, (105), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 21:50:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 329 transitions. [2023-02-15 21:50:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 21:50:32,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:50:32,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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] [2023-02-15 21:50:32,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 21:50:32,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 21:50:32,434 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 21:50:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:50:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 970084470, now seen corresponding path program 1 times [2023-02-15 21:50:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:50:32,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998676788] [2023-02-15 21:50:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:50:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:36,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:50:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:36,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:50:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:36,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 21:50:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:36,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 21:50:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:50:36,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:50:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998676788] [2023-02-15 21:50:36,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998676788] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:50:36,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327524052] [2023-02-15 21:50:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:50:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:50:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:50:36,467 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:50:36,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 21:50:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:50:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 135 conjunts are in the unsatisfiable core [2023-02-15 21:50:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:50:36,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 21:50:36,668 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 6 [2023-02-15 21:50:36,748 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 21:50:36,748 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2023-02-15 21:50:36,806 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1223 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_1223))) is different from true [2023-02-15 21:50:36,817 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 15 [2023-02-15 21:50:36,958 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-02-15 21:50:36,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-02-15 21:50:37,203 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-02-15 21:50:37,207 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 36 [2023-02-15 21:50:37,729 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-02-15 21:50:38,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-02-15 21:50:39,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2023-02-15 21:50:39,593 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 86 [2023-02-15 21:50:41,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2023-02-15 21:50:41,594 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 10 [2023-02-15 21:50:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2023-02-15 21:50:41,739 INFO L328 TraceCheckSpWp]: Computing backward predicates...