./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:34:42,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:34:42,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:34:42,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:34:42,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:34:42,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:34:42,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:34:42,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:34:42,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:34:42,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:34:42,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:34:42,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:34:42,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:34:42,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:34:42,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:34:42,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:34:42,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:34:42,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:34:42,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:34:42,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:34:42,214 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:34:42,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:34:42,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:34:42,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:34:42,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:34:42,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:34:42,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:34:42,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:34:42,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:34:42,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:34:42,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:34:42,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:34:42,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:34:42,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:34:42,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:34:42,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:34:42,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:34:42,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:34:42,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:34:42,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:34:42,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:34:42,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:34:42,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:34:42,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:34:42,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:34:42,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:34:42,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:34:42,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:34:42,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:34:42,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:34:42,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:34:42,263 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:34:42,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:34:42,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:34:42,264 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:34:42,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:34:42,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:34:42,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:34:42,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:34:42,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:34:42,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:34:42,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:34:42,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:34:42,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:34:42,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:34:42,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:34:42,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:34:42,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2022-07-23 05:34:42,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:34:42,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:34:42,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:34:42,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:34:42,458 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:34:42,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-23 05:34:42,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06bf063ed/c7b22213a81c45ad8c6830c5774b5db4/FLAG6060d3e77 [2022-07-23 05:34:42,920 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:34:42,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-23 05:34:42,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06bf063ed/c7b22213a81c45ad8c6830c5774b5db4/FLAG6060d3e77 [2022-07-23 05:34:42,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06bf063ed/c7b22213a81c45ad8c6830c5774b5db4 [2022-07-23 05:34:42,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:34:42,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:34:42,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:34:42,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:34:42,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:34:42,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:34:42" (1/1) ... [2022-07-23 05:34:42,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df554c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:42, skipping insertion in model container [2022-07-23 05:34:42,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:34:42" (1/1) ... [2022-07-23 05:34:42,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:34:43,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:34:43,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:34:43,261 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:34:43,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:34:43,304 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:34:43,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43 WrapperNode [2022-07-23 05:34:43,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:34:43,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:34:43,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:34:43,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:34:43,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,347 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2022-07-23 05:34:43,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:34:43,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:34:43,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:34:43,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:34:43,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:34:43,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:34:43,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:34:43,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:34:43,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (1/1) ... [2022-07-23 05:34:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:34:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:43,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 05:34:43,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 05:34:43,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:34:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:34:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:34:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:34:43,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:34:43,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:34:43,546 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:34:43,548 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:34:43,834 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:34:43,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:34:43,841 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 05:34:43,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:34:43 BoogieIcfgContainer [2022-07-23 05:34:43,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:34:43,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:34:43,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:34:43,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:34:43,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:34:42" (1/3) ... [2022-07-23 05:34:43,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f21c7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:34:43, skipping insertion in model container [2022-07-23 05:34:43,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:43" (2/3) ... [2022-07-23 05:34:43,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f21c7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:34:43, skipping insertion in model container [2022-07-23 05:34:43,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:34:43" (3/3) ... [2022-07-23 05:34:43,852 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2022-07-23 05:34:43,862 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:34:43,862 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-23 05:34:43,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:34:43,904 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@39b034d1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a25eafb [2022-07-23 05:34:43,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-23 05:34:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:34:43,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:43,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:43,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2022-07-23 05:34:43,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:43,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947084185] [2022-07-23 05:34:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947084185] [2022-07-23 05:34:44,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947084185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:34:44,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897247710] [2022-07-23 05:34:44,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:34:44,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:34:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:44,086 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,144 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-23 05:34:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:34:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:34:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,152 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:34:44,152 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:34:44,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:44,157 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:34:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:34:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-23 05:34:44,188 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-23 05:34:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,188 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-23 05:34:44,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-23 05:34:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:44,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:34:44,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-23 05:34:44,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044675811] [2022-07-23 05:34:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044675811] [2022-07-23 05:34:44,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044675811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269630152] [2022-07-23 05:34:44,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:44,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:44,267 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,345 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-23 05:34:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:34:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,348 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:34:44,348 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:34:44,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:44,350 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:34:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:34:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-23 05:34:44,355 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2022-07-23 05:34:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,355 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-23 05:34:44,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-23 05:34:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:44,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:34:44,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,357 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-23 05:34:44,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66689748] [2022-07-23 05:34:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66689748] [2022-07-23 05:34:44,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66689748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:34:44,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034156121] [2022-07-23 05:34:44,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:34:44,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:34:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:44,449 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,477 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-07-23 05:34:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:34:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:34:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,478 INFO L225 Difference]: With dead ends: 49 [2022-07-23 05:34:44,478 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 05:34:44,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:44,479 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 05:34:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-23 05:34:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-23 05:34:44,483 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2022-07-23 05:34:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,483 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-23 05:34:44,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-23 05:34:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:44,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:34:44,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-23 05:34:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643840662] [2022-07-23 05:34:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643840662] [2022-07-23 05:34:44,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643840662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:44,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475541471] [2022-07-23 05:34:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:44,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:44,590 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,675 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-07-23 05:34:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:34:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,680 INFO L225 Difference]: With dead ends: 91 [2022-07-23 05:34:44,680 INFO L226 Difference]: Without dead ends: 91 [2022-07-23 05:34:44,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:44,688 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-23 05:34:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-07-23 05:34:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-23 05:34:44,699 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2022-07-23 05:34:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,699 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-23 05:34:44,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-23 05:34:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:34:44,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:34:44,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-23 05:34:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119295888] [2022-07-23 05:34:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119295888] [2022-07-23 05:34:44,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119295888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428005483] [2022-07-23 05:34:44,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:44,764 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,809 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-23 05:34:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:44,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:34:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,812 INFO L225 Difference]: With dead ends: 50 [2022-07-23 05:34:44,812 INFO L226 Difference]: Without dead ends: 50 [2022-07-23 05:34:44,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:44,818 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 37 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-23 05:34:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-23 05:34:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-23 05:34:44,829 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2022-07-23 05:34:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,829 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-23 05:34:44,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-23 05:34:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:34:44,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:34:44,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2022-07-23 05:34:44,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465765734] [2022-07-23 05:34:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465765734] [2022-07-23 05:34:44,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465765734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342166893] [2022-07-23 05:34:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:44,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:44,866 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,883 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2022-07-23 05:34:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:34:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,884 INFO L225 Difference]: With dead ends: 91 [2022-07-23 05:34:44,884 INFO L226 Difference]: Without dead ends: 91 [2022-07-23 05:34:44,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:44,885 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-23 05:34:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2022-07-23 05:34:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-23 05:34:44,895 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2022-07-23 05:34:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,895 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-23 05:34:44,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-23 05:34:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:34:44,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:34:44,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2022-07-23 05:34:44,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415857224] [2022-07-23 05:34:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415857224] [2022-07-23 05:34:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415857224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:44,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:44,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399101957] [2022-07-23 05:34:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:44,957 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:45,046 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2022-07-23 05:34:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:34:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:34:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:45,047 INFO L225 Difference]: With dead ends: 129 [2022-07-23 05:34:45,047 INFO L226 Difference]: Without dead ends: 129 [2022-07-23 05:34:45,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:45,048 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:45,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-23 05:34:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 60. [2022-07-23 05:34:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-23 05:34:45,055 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2022-07-23 05:34:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:45,055 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-23 05:34:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-23 05:34:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:34:45,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:45,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:45,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:34:45,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2022-07-23 05:34:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:45,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259632086] [2022-07-23 05:34:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:45,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259632086] [2022-07-23 05:34:45,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259632086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:45,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:45,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:34:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013573850] [2022-07-23 05:34:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:45,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:34:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:34:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:45,098 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:45,116 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-07-23 05:34:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:34:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:34:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:45,117 INFO L225 Difference]: With dead ends: 58 [2022-07-23 05:34:45,117 INFO L226 Difference]: Without dead ends: 58 [2022-07-23 05:34:45,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:45,118 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:45,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-23 05:34:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-23 05:34:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-07-23 05:34:45,129 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 11 [2022-07-23 05:34:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:45,129 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-07-23 05:34:45,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-07-23 05:34:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:34:45,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:45,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:34:45,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2022-07-23 05:34:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:45,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634893830] [2022-07-23 05:34:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634893830] [2022-07-23 05:34:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634893830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:45,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:45,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957922426] [2022-07-23 05:34:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:45,193 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:45,214 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-07-23 05:34:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:45,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:34:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:45,215 INFO L225 Difference]: With dead ends: 57 [2022-07-23 05:34:45,215 INFO L226 Difference]: Without dead ends: 57 [2022-07-23 05:34:45,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:45,216 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:45,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-23 05:34:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-23 05:34:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-23 05:34:45,218 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2022-07-23 05:34:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:45,218 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-23 05:34:45,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-23 05:34:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:34:45,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:45,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:34:45,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-23 05:34:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98183446] [2022-07-23 05:34:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98183446] [2022-07-23 05:34:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98183446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443562657] [2022-07-23 05:34:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:45,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:45,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:45,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:34:45,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:34:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:34:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:45,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:34:45,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:45,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:45,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:45,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443562657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:45,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:45,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-07-23 05:34:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723142924] [2022-07-23 05:34:45,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:45,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:34:45,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:34:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:34:45,582 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:45,754 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-07-23 05:34:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:34:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:34:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:45,756 INFO L225 Difference]: With dead ends: 128 [2022-07-23 05:34:45,756 INFO L226 Difference]: Without dead ends: 128 [2022-07-23 05:34:45,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:34:45,757 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 162 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:45,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 285 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-23 05:34:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2022-07-23 05:34:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-07-23 05:34:45,767 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2022-07-23 05:34:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:45,767 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-07-23 05:34:45,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-07-23 05:34:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:34:45,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:45,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:45,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-23 05:34:45,974 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,SelfDestructingSolverStorable9 [2022-07-23 05:34:45,974 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:45,975 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2022-07-23 05:34:45,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:45,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75956778] [2022-07-23 05:34:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:45,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75956778] [2022-07-23 05:34:46,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75956778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:46,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:46,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777644314] [2022-07-23 05:34:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:46,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:46,019 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:46,049 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-07-23 05:34:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:46,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:34:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:46,051 INFO L225 Difference]: With dead ends: 49 [2022-07-23 05:34:46,051 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 05:34:46,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:46,052 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:46,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 05:34:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-23 05:34:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-23 05:34:46,054 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2022-07-23 05:34:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:46,054 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-23 05:34:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-23 05:34:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:34:46,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:46,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:46,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:34:46,056 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2022-07-23 05:34:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:46,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919953222] [2022-07-23 05:34:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:46,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919953222] [2022-07-23 05:34:46,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919953222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:46,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:46,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153835437] [2022-07-23 05:34:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:34:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:34:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:46,123 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:46,196 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-07-23 05:34:46,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:34:46,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:34:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:46,197 INFO L225 Difference]: With dead ends: 72 [2022-07-23 05:34:46,197 INFO L226 Difference]: Without dead ends: 72 [2022-07-23 05:34:46,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:46,197 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:46,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-23 05:34:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-07-23 05:34:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-23 05:34:46,200 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2022-07-23 05:34:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:46,200 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-23 05:34:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-23 05:34:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:34:46,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:46,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-23 05:34:46,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-07-23 05:34:46,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:46,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809963945] [2022-07-23 05:34:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809963945] [2022-07-23 05:34:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809963945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:46,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:46,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287842131] [2022-07-23 05:34:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:46,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:46,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:46,264 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:46,314 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-23 05:34:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:34:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:46,316 INFO L225 Difference]: With dead ends: 99 [2022-07-23 05:34:46,317 INFO L226 Difference]: Without dead ends: 99 [2022-07-23 05:34:46,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:46,318 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:46,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 80 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-23 05:34:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2022-07-23 05:34:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.462962962962963) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-07-23 05:34:46,321 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 14 [2022-07-23 05:34:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:46,322 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-07-23 05:34:46,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-07-23 05:34:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:34:46,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:46,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-23 05:34:46,325 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2022-07-23 05:34:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537027214] [2022-07-23 05:34:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537027214] [2022-07-23 05:34:46,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537027214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530668635] [2022-07-23 05:34:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:46,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:46,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:34:46,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:34:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:34:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:46,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:34:46,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:46,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:46,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:46,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530668635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:46,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:46,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-23 05:34:46,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354109294] [2022-07-23 05:34:46,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:46,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 05:34:46,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:46,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 05:34:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:34:46,666 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:46,804 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-23 05:34:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:34:46,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:34:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:46,805 INFO L225 Difference]: With dead ends: 92 [2022-07-23 05:34:46,805 INFO L226 Difference]: Without dead ends: 92 [2022-07-23 05:34:46,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:34:46,806 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 458 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:46,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 201 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-23 05:34:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-07-23 05:34:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 64 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2022-07-23 05:34:46,807 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 15 [2022-07-23 05:34:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:46,808 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2022-07-23 05:34:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2022-07-23 05:34:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:34:46,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:46,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:46,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:47,015 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,SelfDestructingSolverStorable13 [2022-07-23 05:34:47,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:47,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2022-07-23 05:34:47,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:47,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220439828] [2022-07-23 05:34:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:47,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220439828] [2022-07-23 05:34:47,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220439828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:47,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:47,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897645686] [2022-07-23 05:34:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:47,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:47,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:47,044 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:47,073 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-07-23 05:34:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:34:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:47,074 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:34:47,074 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 05:34:47,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:47,076 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:47,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 05:34:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-07-23 05:34:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-07-23 05:34:47,078 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 17 [2022-07-23 05:34:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:47,078 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-07-23 05:34:47,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-07-23 05:34:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:34:47,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:47,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:47,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-23 05:34:47,079 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2022-07-23 05:34:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738674086] [2022-07-23 05:34:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:47,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:47,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738674086] [2022-07-23 05:34:47,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738674086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:47,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:47,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:34:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152969245] [2022-07-23 05:34:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:34:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:34:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:47,131 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:47,175 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-07-23 05:34:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:34:47,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:34:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:47,176 INFO L225 Difference]: With dead ends: 87 [2022-07-23 05:34:47,176 INFO L226 Difference]: Without dead ends: 87 [2022-07-23 05:34:47,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:47,177 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:47,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 84 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-23 05:34:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-07-23 05:34:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2022-07-23 05:34:47,180 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 17 [2022-07-23 05:34:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:47,180 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2022-07-23 05:34:47,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2022-07-23 05:34:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:34:47,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:47,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:47,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-23 05:34:47,182 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:47,182 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2022-07-23 05:34:47,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:47,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104557495] [2022-07-23 05:34:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:47,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104557495] [2022-07-23 05:34:47,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104557495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:47,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:47,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:34:47,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105335052] [2022-07-23 05:34:47,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:47,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:34:47,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:34:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:47,283 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:47,411 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2022-07-23 05:34:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:34:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:34:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:47,413 INFO L225 Difference]: With dead ends: 151 [2022-07-23 05:34:47,413 INFO L226 Difference]: Without dead ends: 151 [2022-07-23 05:34:47,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:34:47,413 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:47,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-23 05:34:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2022-07-23 05:34:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-07-23 05:34:47,417 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 17 [2022-07-23 05:34:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:47,418 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-07-23 05:34:47,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-07-23 05:34:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:34:47,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:47,419 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:47,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-23 05:34:47,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-23 05:34:47,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954363744] [2022-07-23 05:34:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:47,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954363744] [2022-07-23 05:34:47,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954363744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:47,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700774222] [2022-07-23 05:34:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:47,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:47,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:34:47,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:34:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:34:47,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:47,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:47,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700774222] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:47,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:47,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-23 05:34:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007815699] [2022-07-23 05:34:47,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:47,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:34:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:34:47,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:34:47,637 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:47,798 INFO L93 Difference]: Finished difference Result 278 states and 358 transitions. [2022-07-23 05:34:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:34:47,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:34:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:47,800 INFO L225 Difference]: With dead ends: 278 [2022-07-23 05:34:47,800 INFO L226 Difference]: Without dead ends: 278 [2022-07-23 05:34:47,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:34:47,801 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 534 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:47,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 272 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-23 05:34:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 90. [2022-07-23 05:34:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.369047619047619) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2022-07-23 05:34:47,804 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 18 [2022-07-23 05:34:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:47,804 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2022-07-23 05:34:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2022-07-23 05:34:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:34:47,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:47,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:47,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:48,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-23 05:34:48,020 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash -440236817, now seen corresponding path program 1 times [2022-07-23 05:34:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515587142] [2022-07-23 05:34:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:48,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:48,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:48,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515587142] [2022-07-23 05:34:48,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515587142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:48,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964287492] [2022-07-23 05:34:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:48,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:48,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:48,129 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) [2022-07-23 05:34:48,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:34:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:34:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:48,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:48,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:34:48,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:48,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:48,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964287492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:48,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:48,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-23 05:34:48,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232752189] [2022-07-23 05:34:48,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:48,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:34:48,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:34:48,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:34:48,422 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:48,779 INFO L93 Difference]: Finished difference Result 182 states and 231 transitions. [2022-07-23 05:34:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:48,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:34:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:48,780 INFO L225 Difference]: With dead ends: 182 [2022-07-23 05:34:48,780 INFO L226 Difference]: Without dead ends: 182 [2022-07-23 05:34:48,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:34:48,781 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 371 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:48,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 521 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:34:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-23 05:34:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 102. [2022-07-23 05:34:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 101 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2022-07-23 05:34:48,784 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 21 [2022-07-23 05:34:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:48,784 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2022-07-23 05:34:48,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2022-07-23 05:34:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:34:48,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:48,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:48,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:48,995 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2022-07-23 05:34:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400314468] [2022-07-23 05:34:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:49,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400314468] [2022-07-23 05:34:49,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400314468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:49,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:49,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:49,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672488976] [2022-07-23 05:34:49,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:49,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:49,019 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:49,042 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2022-07-23 05:34:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:34:49,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:34:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:49,043 INFO L225 Difference]: With dead ends: 108 [2022-07-23 05:34:49,043 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 05:34:49,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:34:49,044 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:49,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 05:34:49,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-07-23 05:34:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2022-07-23 05:34:49,046 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 22 [2022-07-23 05:34:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:49,046 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-07-23 05:34:49,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2022-07-23 05:34:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:34:49,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:49,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:49,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-23 05:34:49,047 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2022-07-23 05:34:49,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:49,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309382106] [2022-07-23 05:34:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:49,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309382106] [2022-07-23 05:34:49,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309382106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207249877] [2022-07-23 05:34:49,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:34:49,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:49,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:49,093 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) [2022-07-23 05:34:49,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:34:49,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:34:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:49,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:34:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:49,152 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:49,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:34:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:49,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:49,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207249877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:49,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:49,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-23 05:34:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046665533] [2022-07-23 05:34:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:34:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:34:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:34:49,323 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:49,433 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2022-07-23 05:34:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:34:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:34:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:49,434 INFO L225 Difference]: With dead ends: 200 [2022-07-23 05:34:49,434 INFO L226 Difference]: Without dead ends: 200 [2022-07-23 05:34:49,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:34:49,435 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 231 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:49,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 178 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-23 05:34:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2022-07-23 05:34:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 91 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2022-07-23 05:34:49,437 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 22 [2022-07-23 05:34:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:49,437 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2022-07-23 05:34:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2022-07-23 05:34:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:34:49,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:49,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:49,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:49,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:49,657 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2134181768, now seen corresponding path program 2 times [2022-07-23 05:34:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:49,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048086879] [2022-07-23 05:34:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:49,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:49,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:49,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048086879] [2022-07-23 05:34:49,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048086879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:49,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652813581] [2022-07-23 05:34:49,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:34:49,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:49,827 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) [2022-07-23 05:34:49,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:34:49,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:34:49,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-23 05:34:49,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:49,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:49,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:34:50,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:34:50,089 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-23 05:34:50,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-23 05:34:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:50,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:50,151 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_241) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-23 05:34:50,156 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:50,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:34:50,163 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:50,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:34:50,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:34:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:50,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652813581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:50,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:50,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-07-23 05:34:50,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530682615] [2022-07-23 05:34:50,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:50,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 05:34:50,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:50,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 05:34:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2022-07-23 05:34:50,286 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:50,618 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2022-07-23 05:34:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:34:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:34:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:50,620 INFO L225 Difference]: With dead ends: 187 [2022-07-23 05:34:50,620 INFO L226 Difference]: Without dead ends: 187 [2022-07-23 05:34:50,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=948, Unknown=1, NotChecked=64, Total=1190 [2022-07-23 05:34:50,621 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 143 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:50,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 664 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-07-23 05:34:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-23 05:34:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 103. [2022-07-23 05:34:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 102 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:50,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-07-23 05:34:50,623 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 23 [2022-07-23 05:34:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:50,623 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-07-23 05:34:50,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-07-23 05:34:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:34:50,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:50,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:50,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:50,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:50,824 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2022-07-23 05:34:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:50,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907368215] [2022-07-23 05:34:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:50,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907368215] [2022-07-23 05:34:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907368215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:50,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890833896] [2022-07-23 05:34:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:50,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:50,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:50,871 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) [2022-07-23 05:34:50,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:34:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:34:50,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:50,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890833896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:51,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:51,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-23 05:34:51,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21331241] [2022-07-23 05:34:51,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:51,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:34:51,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:34:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:51,006 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:51,047 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2022-07-23 05:34:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:34:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:34:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:51,048 INFO L225 Difference]: With dead ends: 205 [2022-07-23 05:34:51,048 INFO L226 Difference]: Without dead ends: 205 [2022-07-23 05:34:51,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:51,049 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:51,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-23 05:34:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2022-07-23 05:34:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 175 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2022-07-23 05:34:51,052 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 23 [2022-07-23 05:34:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:51,052 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2022-07-23 05:34:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2022-07-23 05:34:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:34:51,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:51,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:51,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:51,270 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2022-07-23 05:34:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:51,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78246188] [2022-07-23 05:34:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78246188] [2022-07-23 05:34:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78246188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:51,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:51,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:34:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177067940] [2022-07-23 05:34:51,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:34:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:34:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:51,330 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:51,421 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-07-23 05:34:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:34:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:34:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:51,422 INFO L225 Difference]: With dead ends: 260 [2022-07-23 05:34:51,422 INFO L226 Difference]: Without dead ends: 260 [2022-07-23 05:34:51,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:34:51,422 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:51,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-23 05:34:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2022-07-23 05:34:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2419354838709677) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2022-07-23 05:34:51,425 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2022-07-23 05:34:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:51,426 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2022-07-23 05:34:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2022-07-23 05:34:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:34:51,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:51,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:51,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-23 05:34:51,426 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2022-07-23 05:34:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:51,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419720123] [2022-07-23 05:34:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419720123] [2022-07-23 05:34:51,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419720123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:51,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:51,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:34:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054885590] [2022-07-23 05:34:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:51,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:34:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:34:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:34:51,538 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:51,657 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-07-23 05:34:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:34:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:51,659 INFO L225 Difference]: With dead ends: 223 [2022-07-23 05:34:51,659 INFO L226 Difference]: Without dead ends: 223 [2022-07-23 05:34:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:34:51,659 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:51,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 182 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-23 05:34:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2022-07-23 05:34:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2022-07-23 05:34:51,662 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2022-07-23 05:34:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:51,663 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2022-07-23 05:34:51,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2022-07-23 05:34:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:34:51,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:51,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:51,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-23 05:34:51,663 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2022-07-23 05:34:51,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647952742] [2022-07-23 05:34:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:51,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647952742] [2022-07-23 05:34:51,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647952742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:51,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:51,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:51,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882559264] [2022-07-23 05:34:51,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:51,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:51,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:51,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:51,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:51,700 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:51,714 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2022-07-23 05:34:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:34:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:51,715 INFO L225 Difference]: With dead ends: 180 [2022-07-23 05:34:51,716 INFO L226 Difference]: Without dead ends: 133 [2022-07-23 05:34:51,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:51,716 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:51,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-23 05:34:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-23 05:34:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.178294573643411) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2022-07-23 05:34:51,719 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 25 [2022-07-23 05:34:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:51,719 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2022-07-23 05:34:51,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2022-07-23 05:34:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:34:51,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:51,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:51,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-23 05:34:51,720 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2022-07-23 05:34:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050904400] [2022-07-23 05:34:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050904400] [2022-07-23 05:34:51,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050904400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447470578] [2022-07-23 05:34:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:34:51,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:51,802 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) [2022-07-23 05:34:51,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:34:51,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:34:51,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:34:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:51,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:34:51,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:52,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447470578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:52,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:52,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-07-23 05:34:52,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920699837] [2022-07-23 05:34:52,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:34:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:34:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:34:52,265 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:52,668 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2022-07-23 05:34:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:34:52,668 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 05:34:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:52,669 INFO L225 Difference]: With dead ends: 208 [2022-07-23 05:34:52,669 INFO L226 Difference]: Without dead ends: 198 [2022-07-23 05:34:52,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:34:52,670 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 288 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:52,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 318 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:34:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-23 05:34:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-07-23 05:34:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-07-23 05:34:52,672 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 27 [2022-07-23 05:34:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:52,673 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-07-23 05:34:52,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-07-23 05:34:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:34:52,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:52,673 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 05:34:52,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:52,883 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,SelfDestructingSolverStorable26 [2022-07-23 05:34:52,883 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2022-07-23 05:34:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:52,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589115614] [2022-07-23 05:34:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:52,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589115614] [2022-07-23 05:34:52,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589115614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:52,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:52,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:34:52,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621287911] [2022-07-23 05:34:52,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:52,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:34:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:34:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:34:52,972 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:53,084 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2022-07-23 05:34:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 05:34:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:53,085 INFO L225 Difference]: With dead ends: 218 [2022-07-23 05:34:53,085 INFO L226 Difference]: Without dead ends: 181 [2022-07-23 05:34:53,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:34:53,086 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:53,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-23 05:34:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2022-07-23 05:34:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.178082191780822) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2022-07-23 05:34:53,089 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 27 [2022-07-23 05:34:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:53,089 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2022-07-23 05:34:53,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2022-07-23 05:34:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:34:53,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:53,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:53,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-23 05:34:53,090 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2022-07-23 05:34:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839055261] [2022-07-23 05:34:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:53,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:53,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839055261] [2022-07-23 05:34:53,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839055261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:53,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935446629] [2022-07-23 05:34:53,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:34:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:53,224 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) [2022-07-23 05:34:53,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:34:53,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:34:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-23 05:34:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:53,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:53,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:34:53,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:34:53,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:34:53,679 INFO L356 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2022-07-23 05:34:53,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 20 [2022-07-23 05:34:53,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:34:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:53,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:53,901 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:53,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-07-23 05:34:53,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:53,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:53,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 75 [2022-07-23 05:34:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:53,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-07-23 05:34:54,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:54,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:34:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:54,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935446629] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:54,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:54,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 34 [2022-07-23 05:34:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37905147] [2022-07-23 05:34:54,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:54,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:34:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:34:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=995, Unknown=1, NotChecked=0, Total=1122 [2022-07-23 05:34:54,248 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:55,047 INFO L93 Difference]: Finished difference Result 278 states and 308 transitions. [2022-07-23 05:34:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 05:34:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-23 05:34:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:55,050 INFO L225 Difference]: With dead ends: 278 [2022-07-23 05:34:55,050 INFO L226 Difference]: Without dead ends: 241 [2022-07-23 05:34:55,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=330, Invalid=2425, Unknown=1, NotChecked=0, Total=2756 [2022-07-23 05:34:55,052 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 163 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:55,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 720 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 560 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-07-23 05:34:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-23 05:34:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 173. [2022-07-23 05:34:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2022-07-23 05:34:55,054 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2022-07-23 05:34:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:55,054 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2022-07-23 05:34:55,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2022-07-23 05:34:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:34:55,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:55,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 05:34:55,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-23 05:34:55,267 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2022-07-23 05:34:55,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:55,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222611012] [2022-07-23 05:34:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:55,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:55,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222611012] [2022-07-23 05:34:55,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222611012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374513977] [2022-07-23 05:34:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:55,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:55,353 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) [2022-07-23 05:34:55,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:34:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:34:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:55,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:55,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 05:34:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:55,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374513977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:55,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:55,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-23 05:34:55,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036726021] [2022-07-23 05:34:55,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:55,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:34:55,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:34:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:34:55,639 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:55,881 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2022-07-23 05:34:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-23 05:34:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:55,882 INFO L225 Difference]: With dead ends: 212 [2022-07-23 05:34:55,882 INFO L226 Difference]: Without dead ends: 212 [2022-07-23 05:34:55,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:34:55,883 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 205 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:55,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 241 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-23 05:34:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-07-23 05:34:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-07-23 05:34:55,886 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2022-07-23 05:34:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:55,886 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-07-23 05:34:55,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-07-23 05:34:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:34:55,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:55,886 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:55,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:56,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:56,087 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2022-07-23 05:34:56,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:56,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9746771] [2022-07-23 05:34:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:56,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:56,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:56,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9746771] [2022-07-23 05:34:56,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9746771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:56,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888621643] [2022-07-23 05:34:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:34:56,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:56,213 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) [2022-07-23 05:34:56,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:34:56,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-23 05:34:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-23 05:34:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:56,319 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:56,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:34:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:57,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888621643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:57,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 15] total 38 [2022-07-23 05:34:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318028801] [2022-07-23 05:34:57,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-23 05:34:57,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-23 05:34:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:34:57,302 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:58,188 INFO L93 Difference]: Finished difference Result 279 states and 307 transitions. [2022-07-23 05:34:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:34:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-23 05:34:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:58,196 INFO L225 Difference]: With dead ends: 279 [2022-07-23 05:34:58,196 INFO L226 Difference]: Without dead ends: 269 [2022-07-23 05:34:58,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-07-23 05:34:58,198 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 183 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:58,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 943 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 517 Invalid, 0 Unknown, 380 Unchecked, 0.2s Time] [2022-07-23 05:34:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-23 05:34:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2022-07-23 05:34:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 211 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 239 transitions. [2022-07-23 05:34:58,201 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 239 transitions. Word has length 33 [2022-07-23 05:34:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:58,201 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 239 transitions. [2022-07-23 05:34:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 239 transitions. [2022-07-23 05:34:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:34:58,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:58,202 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:58,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:58,417 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,SelfDestructingSolverStorable30 [2022-07-23 05:34:58,417 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:34:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash 407057716, now seen corresponding path program 6 times [2022-07-23 05:34:58,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:58,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924511431] [2022-07-23 05:34:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:58,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:58,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924511431] [2022-07-23 05:34:58,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924511431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341326700] [2022-07-23 05:34:58,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:34:58,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:58,571 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) [2022-07-23 05:34:58,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:34:58,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-23 05:34:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:58,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-23 05:34:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:58,690 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:58,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:34:59,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:34:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:59,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-23 05:34:59,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:59,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 14 [2022-07-23 05:34:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:59,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:59,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 123 treesize of output 111 [2022-07-23 05:35:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:00,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341326700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:00,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:00,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 16] total 42 [2022-07-23 05:35:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669608201] [2022-07-23 05:35:00,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:00,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-23 05:35:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-23 05:35:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:35:00,370 INFO L87 Difference]: Start difference. First operand 212 states and 239 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:02,149 INFO L93 Difference]: Finished difference Result 429 states and 469 transitions. [2022-07-23 05:35:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-23 05:35:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-23 05:35:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:02,151 INFO L225 Difference]: With dead ends: 429 [2022-07-23 05:35:02,151 INFO L226 Difference]: Without dead ends: 384 [2022-07-23 05:35:02,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=5539, Unknown=0, NotChecked=0, Total=6162 [2022-07-23 05:35:02,152 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 463 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:02,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 964 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 822 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-07-23 05:35:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-23 05:35:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 235. [2022-07-23 05:35:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.147186147186147) internal successors, (265), 234 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2022-07-23 05:35:02,155 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 35 [2022-07-23 05:35:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:02,155 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2022-07-23 05:35:02,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2022-07-23 05:35:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 05:35:02,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:02,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-23 05:35:02,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:02,356 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,SelfDestructingSolverStorable31 [2022-07-23 05:35:02,357 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2022-07-23 05:35:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:02,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850650093] [2022-07-23 05:35:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:02,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850650093] [2022-07-23 05:35:02,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850650093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049357762] [2022-07-23 05:35:02,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:02,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:02,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:02,609 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) [2022-07-23 05:35:02,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:35:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:02,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 05:35:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:02,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:35:02,965 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-23 05:35:02,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-23 05:35:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:02,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 20 treesize of output 10 [2022-07-23 05:35:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:03,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:03,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2022-07-23 05:35:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:03,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:03,997 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-23 05:35:03,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-23 05:35:04,006 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:04,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2022-07-23 05:35:04,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:35:04,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-23 05:35:04,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:04,049 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:04,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 71 [2022-07-23 05:35:04,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-23 05:35:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:04,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049357762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:04,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:04,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2022-07-23 05:35:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844575247] [2022-07-23 05:35:04,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:04,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-23 05:35:04,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-23 05:35:04,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2209, Unknown=4, NotChecked=0, Total=2450 [2022-07-23 05:35:04,231 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:05,057 INFO L93 Difference]: Finished difference Result 266 states and 296 transitions. [2022-07-23 05:35:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-23 05:35:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-23 05:35:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:05,058 INFO L225 Difference]: With dead ends: 266 [2022-07-23 05:35:05,058 INFO L226 Difference]: Without dead ends: 254 [2022-07-23 05:35:05,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=502, Invalid=4464, Unknown=4, NotChecked=0, Total=4970 [2022-07-23 05:35:05,060 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:05,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 341 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 269 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-07-23 05:35:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-23 05:35:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 236. [2022-07-23 05:35:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.146551724137931) internal successors, (266), 235 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2022-07-23 05:35:05,063 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 37 [2022-07-23 05:35:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:05,063 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2022-07-23 05:35:05,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2022-07-23 05:35:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 05:35:05,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:05,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:05,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:05,275 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,SelfDestructingSolverStorable32 [2022-07-23 05:35:05,275 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 7 times [2022-07-23 05:35:05,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:05,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372338325] [2022-07-23 05:35:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:05,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372338325] [2022-07-23 05:35:05,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372338325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029728974] [2022-07-23 05:35:05,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:35:05,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:05,437 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) [2022-07-23 05:35:05,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:35:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-23 05:35:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:05,543 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:05,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:35:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:06,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:06,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029728974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:06,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:06,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2022-07-23 05:35:06,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454615148] [2022-07-23 05:35:06,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:06,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-23 05:35:06,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-23 05:35:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:35:06,644 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:08,169 INFO L93 Difference]: Finished difference Result 433 states and 470 transitions. [2022-07-23 05:35:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 05:35:08,169 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-23 05:35:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:08,170 INFO L225 Difference]: With dead ends: 433 [2022-07-23 05:35:08,170 INFO L226 Difference]: Without dead ends: 423 [2022-07-23 05:35:08,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-07-23 05:35:08,172 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 388 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:08,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1492 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1208 Invalid, 0 Unknown, 509 Unchecked, 0.5s Time] [2022-07-23 05:35:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-23 05:35:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2022-07-23 05:35:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.138996138996139) internal successors, (295), 262 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2022-07-23 05:35:08,176 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 39 [2022-07-23 05:35:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:08,176 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2022-07-23 05:35:08,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2022-07-23 05:35:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 05:35:08,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:08,177 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-07-23 05:35:08,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:08,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:08,398 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash -22467999, now seen corresponding path program 1 times [2022-07-23 05:35:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:08,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424484008] [2022-07-23 05:35:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:35:08,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:08,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424484008] [2022-07-23 05:35:08,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424484008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:08,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825983578] [2022-07-23 05:35:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:08,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:08,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:08,722 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) [2022-07-23 05:35:08,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:35:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-23 05:35:08,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:08,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:08,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:35:09,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 05:35:09,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:35:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:35:09,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:09,044 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:35:09,048 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-23 05:35:09,059 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-23 05:35:09,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:09,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-23 05:35:09,067 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:09,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-23 05:35:09,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:35:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-23 05:35:09,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825983578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:09,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:09,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 31 [2022-07-23 05:35:09,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075232307] [2022-07-23 05:35:09,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:09,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:35:09,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:35:09,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=648, Unknown=3, NotChecked=162, Total=930 [2022-07-23 05:35:09,228 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:09,727 INFO L93 Difference]: Finished difference Result 280 states and 311 transitions. [2022-07-23 05:35:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:35:09,727 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-23 05:35:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:09,728 INFO L225 Difference]: With dead ends: 280 [2022-07-23 05:35:09,728 INFO L226 Difference]: Without dead ends: 255 [2022-07-23 05:35:09,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=1317, Unknown=3, NotChecked=234, Total=1806 [2022-07-23 05:35:09,729 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:09,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 334 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 377 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-07-23 05:35:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-23 05:35:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2022-07-23 05:35:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.1411290322580645) internal successors, (283), 251 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2022-07-23 05:35:09,732 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 39 [2022-07-23 05:35:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:09,732 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2022-07-23 05:35:09,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2022-07-23 05:35:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 05:35:09,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:09,733 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:09,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:09,955 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash 224138538, now seen corresponding path program 8 times [2022-07-23 05:35:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:09,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242077704] [2022-07-23 05:35:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:10,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242077704] [2022-07-23 05:35:10,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242077704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:10,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164282884] [2022-07-23 05:35:10,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:10,144 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) [2022-07-23 05:35:10,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:35:10,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-23 05:35:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:10,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:10,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:35:10,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:35:10,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:35:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:10,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:10,534 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_622) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:35:10,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:10,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:35:10,546 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:10,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:35:10,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:35:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:10,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164282884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:10,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:10,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 31 [2022-07-23 05:35:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175658433] [2022-07-23 05:35:10,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:10,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:35:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:35:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2022-07-23 05:35:10,749 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:11,309 INFO L93 Difference]: Finished difference Result 491 states and 536 transitions. [2022-07-23 05:35:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:35:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-23 05:35:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:11,310 INFO L225 Difference]: With dead ends: 491 [2022-07-23 05:35:11,310 INFO L226 Difference]: Without dead ends: 457 [2022-07-23 05:35:11,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1590, Unknown=1, NotChecked=82, Total=1892 [2022-07-23 05:35:11,311 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 304 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:11,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1138 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 828 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-07-23 05:35:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-23 05:35:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 277. [2022-07-23 05:35:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 273 states have (on average 1.1428571428571428) internal successors, (312), 276 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 312 transitions. [2022-07-23 05:35:11,315 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 312 transitions. Word has length 41 [2022-07-23 05:35:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:11,315 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 312 transitions. [2022-07-23 05:35:11,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 312 transitions. [2022-07-23 05:35:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 05:35:11,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:11,316 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 05:35:11,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:11,531 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,SelfDestructingSolverStorable35 [2022-07-23 05:35:11,531 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2099498562, now seen corresponding path program 2 times [2022-07-23 05:35:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412132890] [2022-07-23 05:35:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:11,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:35:11,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:11,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412132890] [2022-07-23 05:35:11,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412132890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:11,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408659292] [2022-07-23 05:35:11,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:11,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:11,740 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) [2022-07-23 05:35:11,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:35:11,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:11,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:11,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:35:11,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:11,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:11,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:35:12,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-23 05:35:12,091 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-23 05:35:12,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-23 05:35:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:35:12,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:12,130 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|))) is different from false [2022-07-23 05:35:12,134 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-23 05:35:12,144 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-23 05:35:12,148 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:12,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-23 05:35:12,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:12,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-23 05:35:12,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:35:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2022-07-23 05:35:12,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408659292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:12,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:12,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-07-23 05:35:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947966746] [2022-07-23 05:35:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:35:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:35:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=708, Unknown=3, NotChecked=168, Total=992 [2022-07-23 05:35:12,267 INFO L87 Difference]: Start difference. First operand 277 states and 312 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:12,541 INFO L93 Difference]: Finished difference Result 474 states and 521 transitions. [2022-07-23 05:35:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:35:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-23 05:35:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:12,542 INFO L225 Difference]: With dead ends: 474 [2022-07-23 05:35:12,543 INFO L226 Difference]: Without dead ends: 367 [2022-07-23 05:35:12,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1212, Unknown=3, NotChecked=222, Total=1640 [2022-07-23 05:35:12,543 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:12,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 357 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 214 Unchecked, 0.1s Time] [2022-07-23 05:35:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-23 05:35:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 319. [2022-07-23 05:35:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 315 states have (on average 1.1365079365079365) internal successors, (358), 318 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 358 transitions. [2022-07-23 05:35:12,547 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 358 transitions. Word has length 43 [2022-07-23 05:35:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:12,547 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 358 transitions. [2022-07-23 05:35:12,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 358 transitions. [2022-07-23 05:35:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 05:35:12,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:12,548 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:12,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:12,765 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,SelfDestructingSolverStorable36 [2022-07-23 05:35:12,765 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 9 times [2022-07-23 05:35:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:12,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992776789] [2022-07-23 05:35:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992776789] [2022-07-23 05:35:12,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992776789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558629476] [2022-07-23 05:35:12,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:12,921 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) [2022-07-23 05:35:12,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:35:13,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-23 05:35:13,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 05:35:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:13,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:35:13,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:13,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:13,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:13,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558629476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:13,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:13,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-07-23 05:35:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316691601] [2022-07-23 05:35:13,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-23 05:35:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-23 05:35:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 05:35:13,793 INFO L87 Difference]: Start difference. First operand 319 states and 358 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:14,791 INFO L93 Difference]: Finished difference Result 571 states and 623 transitions. [2022-07-23 05:35:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 05:35:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-23 05:35:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:14,793 INFO L225 Difference]: With dead ends: 571 [2022-07-23 05:35:14,793 INFO L226 Difference]: Without dead ends: 551 [2022-07-23 05:35:14,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2022-07-23 05:35:14,794 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 685 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:14,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 850 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:35:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-23 05:35:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 348. [2022-07-23 05:35:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.130813953488372) internal successors, (389), 347 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 389 transitions. [2022-07-23 05:35:14,798 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 389 transitions. Word has length 45 [2022-07-23 05:35:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:14,799 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 389 transitions. [2022-07-23 05:35:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 389 transitions. [2022-07-23 05:35:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:35:14,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:14,799 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:14,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-23 05:35:15,012 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160992, now seen corresponding path program 10 times [2022-07-23 05:35:15,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:15,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871786382] [2022-07-23 05:35:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:15,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871786382] [2022-07-23 05:35:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871786382] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271166056] [2022-07-23 05:35:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:35:15,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:15,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:15,214 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) [2022-07-23 05:35:15,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:35:15,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:35:15,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-23 05:35:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:15,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:15,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:35:15,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:35:15,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:35:33,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:33,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 05:35:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 29 proven. 56 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:33,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:33,741 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:33,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-23 05:35:33,749 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:33,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-23 05:35:33,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-23 05:35:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:34,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:34,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271166056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:34,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:34,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-07-23 05:35:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577125594] [2022-07-23 05:35:34,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-23 05:35:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-23 05:35:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2505, Unknown=6, NotChecked=0, Total=2756 [2022-07-23 05:35:34,402 INFO L87 Difference]: Start difference. First operand 348 states and 389 transitions. Second operand has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:47,122 INFO L93 Difference]: Finished difference Result 726 states and 787 transitions. [2022-07-23 05:35:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-23 05:35:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-23 05:35:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:47,124 INFO L225 Difference]: With dead ends: 726 [2022-07-23 05:35:47,124 INFO L226 Difference]: Without dead ends: 656 [2022-07-23 05:35:47,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=543, Invalid=5771, Unknown=6, NotChecked=0, Total=6320 [2022-07-23 05:35:47,126 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 263 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:47,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2205 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1418 Invalid, 0 Unknown, 412 Unchecked, 0.5s Time] [2022-07-23 05:35:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-07-23 05:35:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 377. [2022-07-23 05:35:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 373 states have (on average 1.1313672922252012) internal successors, (422), 376 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 422 transitions. [2022-07-23 05:35:47,131 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 422 transitions. Word has length 47 [2022-07-23 05:35:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:47,131 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 422 transitions. [2022-07-23 05:35:47,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 422 transitions. [2022-07-23 05:35:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:35:47,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:47,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-23 05:35:47,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:47,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:47,332 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 599820123, now seen corresponding path program 3 times [2022-07-23 05:35:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389680153] [2022-07-23 05:35:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:35:47,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:47,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389680153] [2022-07-23 05:35:47,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389680153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:47,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442415425] [2022-07-23 05:35:47,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:47,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:47,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:47,465 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) [2022-07-23 05:35:47,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:35:47,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:35:47,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:35:47,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:35:47,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:47,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:35:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:35:47,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442415425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:47,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:47,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-23 05:35:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002299522] [2022-07-23 05:35:47,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:35:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:35:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:35:47,865 INFO L87 Difference]: Start difference. First operand 377 states and 422 transitions. Second operand has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:48,280 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2022-07-23 05:35:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:35:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-23 05:35:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:48,281 INFO L225 Difference]: With dead ends: 501 [2022-07-23 05:35:48,281 INFO L226 Difference]: Without dead ends: 501 [2022-07-23 05:35:48,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:35:48,282 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 421 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:48,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 315 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:35:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-23 05:35:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2022-07-23 05:35:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.1233933161953729) internal successors, (437), 392 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 437 transitions. [2022-07-23 05:35:48,286 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 437 transitions. Word has length 47 [2022-07-23 05:35:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:48,287 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 437 transitions. [2022-07-23 05:35:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 437 transitions. [2022-07-23 05:35:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:35:48,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:48,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2022-07-23 05:35:48,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-23 05:35:48,499 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,SelfDestructingSolverStorable39 [2022-07-23 05:35:48,500 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1568194937, now seen corresponding path program 1 times [2022-07-23 05:35:48,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:48,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181773217] [2022-07-23 05:35:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:48,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:48,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181773217] [2022-07-23 05:35:48,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181773217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:48,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639027392] [2022-07-23 05:35:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:48,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:48,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:48,636 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) [2022-07-23 05:35:48,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:35:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:35:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:48,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:35:48,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:49,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:49,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639027392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:49,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:49,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-07-23 05:35:49,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087194293] [2022-07-23 05:35:49,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-23 05:35:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-23 05:35:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:35:49,582 INFO L87 Difference]: Start difference. First operand 393 states and 437 transitions. Second operand has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:51,250 INFO L93 Difference]: Finished difference Result 626 states and 683 transitions. [2022-07-23 05:35:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-23 05:35:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-23 05:35:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:51,252 INFO L225 Difference]: With dead ends: 626 [2022-07-23 05:35:51,252 INFO L226 Difference]: Without dead ends: 620 [2022-07-23 05:35:51,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=882, Invalid=3810, Unknown=0, NotChecked=0, Total=4692 [2022-07-23 05:35:51,253 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 425 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:51,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 456 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:35:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-23 05:35:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 454. [2022-07-23 05:35:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 453 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 509 transitions. [2022-07-23 05:35:51,258 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 509 transitions. Word has length 50 [2022-07-23 05:35:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:51,258 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 509 transitions. [2022-07-23 05:35:51,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 509 transitions. [2022-07-23 05:35:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:35:51,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:51,259 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:51,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:51,475 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 11 times [2022-07-23 05:35:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:51,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294987305] [2022-07-23 05:35:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:51,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294987305] [2022-07-23 05:35:51,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294987305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779681445] [2022-07-23 05:35:51,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:35:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:51,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:51,677 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) [2022-07-23 05:35:51,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:35:51,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-23 05:35:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-23 05:35:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:51,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:51,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:35:51,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:52,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:52,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:52,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779681445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:52,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:52,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-07-23 05:35:52,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725878888] [2022-07-23 05:35:52,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:52,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:35:52,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:52,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:35:52,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:35:52,675 INFO L87 Difference]: Start difference. First operand 454 states and 509 transitions. Second operand has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:53,831 INFO L93 Difference]: Finished difference Result 904 states and 985 transitions. [2022-07-23 05:35:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 05:35:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 05:35:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:53,833 INFO L225 Difference]: With dead ends: 904 [2022-07-23 05:35:53,833 INFO L226 Difference]: Without dead ends: 884 [2022-07-23 05:35:53,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2022-07-23 05:35:53,836 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 558 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:53,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1560 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:35:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-23 05:35:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 504. [2022-07-23 05:35:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.124) internal successors, (562), 503 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2022-07-23 05:35:53,846 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 51 [2022-07-23 05:35:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:53,846 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2022-07-23 05:35:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2022-07-23 05:35:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:35:53,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:53,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-07-23 05:35:53,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:54,066 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash 620577460, now seen corresponding path program 3 times [2022-07-23 05:35:54,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:54,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679524155] [2022-07-23 05:35:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:54,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:54,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679524155] [2022-07-23 05:35:54,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679524155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817451455] [2022-07-23 05:35:54,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:54,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:54,594 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) [2022-07-23 05:35:54,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:35:54,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:35:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-23 05:35:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:54,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:35:55,186 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-23 05:35:55,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-23 05:35:55,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 05:35:55,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:55,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 20 treesize of output 10 [2022-07-23 05:35:55,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-23 05:35:55,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:55,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:55,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:55,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-23 05:35:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:55,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:55,638 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:35:55,642 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-23 05:35:55,691 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem5#1| 0)) is different from false [2022-07-23 05:35:55,700 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post4#1.base|) |c_ULTIMATE.start_cstrncat_#t~post4#1.offset|) 0)) is different from false [2022-07-23 05:35:55,705 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:35:55,858 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-23 05:35:55,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-23 05:35:55,868 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:55,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2022-07-23 05:35:55,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:35:55,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-23 05:35:55,924 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-23 05:35:55,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 71 [2022-07-23 05:35:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2022-07-23 05:35:56,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817451455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:56,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:56,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 57 [2022-07-23 05:35:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451058819] [2022-07-23 05:35:56,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:56,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-23 05:35:56,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-23 05:35:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2412, Unknown=6, NotChecked=520, Total=3192 [2022-07-23 05:35:56,395 INFO L87 Difference]: Start difference. First operand 504 states and 562 transitions. Second operand has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:57,391 INFO L93 Difference]: Finished difference Result 522 states and 579 transitions. [2022-07-23 05:35:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:35:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 05:35:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:57,393 INFO L225 Difference]: With dead ends: 522 [2022-07-23 05:35:57,393 INFO L226 Difference]: Without dead ends: 504 [2022-07-23 05:35:57,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=452, Invalid=4254, Unknown=6, NotChecked=690, Total=5402 [2022-07-23 05:35:57,394 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:57,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 487 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 399 Invalid, 0 Unknown, 622 Unchecked, 0.2s Time] [2022-07-23 05:35:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-23 05:35:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-07-23 05:35:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.122) internal successors, (561), 503 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 561 transitions. [2022-07-23 05:35:57,398 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 561 transitions. Word has length 51 [2022-07-23 05:35:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:57,399 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 561 transitions. [2022-07-23 05:35:57,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 561 transitions. [2022-07-23 05:35:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:35:57,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:57,400 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:57,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:57,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:57,621 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:57,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1125709994, now seen corresponding path program 12 times [2022-07-23 05:35:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:57,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113604233] [2022-07-23 05:35:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:57,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:57,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:57,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113604233] [2022-07-23 05:35:57,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113604233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011697816] [2022-07-23 05:35:57,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:35:57,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:57,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:57,940 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) [2022-07-23 05:35:57,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:35:58,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-23 05:35:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-23 05:35:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:58,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:35:58,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:35:58,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:35:58,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:35:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:58,497 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_980 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_980) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:35:58,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:58,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:35:58,507 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:58,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:35:58,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:35:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011697816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:58,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:58,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 37 [2022-07-23 05:35:58,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678894124] [2022-07-23 05:35:58,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:58,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-23 05:35:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-23 05:35:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1158, Unknown=1, NotChecked=68, Total=1332 [2022-07-23 05:35:58,729 INFO L87 Difference]: Start difference. First operand 504 states and 561 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:59,603 INFO L93 Difference]: Finished difference Result 1062 states and 1151 transitions. [2022-07-23 05:35:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:35:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-23 05:35:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:59,605 INFO L225 Difference]: With dead ends: 1062 [2022-07-23 05:35:59,605 INFO L226 Difference]: Without dead ends: 1003 [2022-07-23 05:35:59,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=1899, Unknown=1, NotChecked=88, Total=2162 [2022-07-23 05:35:59,606 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 265 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 2393 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:59,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 2393 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1710 Invalid, 0 Unknown, 325 Unchecked, 0.6s Time] [2022-07-23 05:35:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-23 05:35:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 537. [2022-07-23 05:35:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.125703564727955) internal successors, (600), 536 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 600 transitions. [2022-07-23 05:35:59,612 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 600 transitions. Word has length 53 [2022-07-23 05:35:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:59,612 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 600 transitions. [2022-07-23 05:35:59,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 600 transitions. [2022-07-23 05:35:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:35:59,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:59,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-07-23 05:35:59,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:59,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:59,827 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash -986319027, now seen corresponding path program 4 times [2022-07-23 05:35:59,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:59,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075804611] [2022-07-23 05:35:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075804611] [2022-07-23 05:36:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075804611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943273315] [2022-07-23 05:36:00,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:00,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:00,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:00,331 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) [2022-07-23 05:36:00,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:36:00,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-23 05:36:00,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:00,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:00,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:36:00,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:36:00,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 05:36:00,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 05:36:00,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:00,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-23 05:36:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:01,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:01,405 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:01,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-23 05:36:01,410 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:01,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-23 05:36:01,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-23 05:36:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:01,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943273315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:01,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:01,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 43 [2022-07-23 05:36:01,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333159271] [2022-07-23 05:36:01,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:01,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-23 05:36:01,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-23 05:36:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1634, Unknown=35, NotChecked=0, Total=1806 [2022-07-23 05:36:01,796 INFO L87 Difference]: Start difference. First operand 537 states and 600 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:02,701 INFO L93 Difference]: Finished difference Result 555 states and 617 transitions. [2022-07-23 05:36:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:36:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-23 05:36:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:02,703 INFO L225 Difference]: With dead ends: 555 [2022-07-23 05:36:02,703 INFO L226 Difference]: Without dead ends: 518 [2022-07-23 05:36:02,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=338, Invalid=3165, Unknown=37, NotChecked=0, Total=3540 [2022-07-23 05:36:02,704 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:02,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 519 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 406 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-07-23 05:36:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-23 05:36:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-07-23 05:36:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.1245136186770428) internal successors, (578), 517 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 578 transitions. [2022-07-23 05:36:02,708 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 578 transitions. Word has length 53 [2022-07-23 05:36:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:02,708 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 578 transitions. [2022-07-23 05:36:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 578 transitions. [2022-07-23 05:36:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 05:36:02,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:02,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:02,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:02,919 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,SelfDestructingSolverStorable44 [2022-07-23 05:36:02,919 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash 796337809, now seen corresponding path program 4 times [2022-07-23 05:36:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:02,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740311264] [2022-07-23 05:36:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:02,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:03,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740311264] [2022-07-23 05:36:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740311264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517687224] [2022-07-23 05:36:03,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:03,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:03,290 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) [2022-07-23 05:36:03,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:36:03,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:03,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:36:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:03,403 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:03,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:36:03,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:03,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:36:03,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 05:36:03,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-23 05:36:03,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:03,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-23 05:36:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:03,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:04,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:04,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-23 05:36:04,267 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:04,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-23 05:36:04,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-23 05:36:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:04,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517687224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:04,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:04,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 45 [2022-07-23 05:36:04,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779985478] [2022-07-23 05:36:04,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:04,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-23 05:36:04,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-23 05:36:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1783, Unknown=37, NotChecked=0, Total=1980 [2022-07-23 05:36:04,741 INFO L87 Difference]: Start difference. First operand 518 states and 578 transitions. Second operand has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:05,707 INFO L93 Difference]: Finished difference Result 671 states and 739 transitions. [2022-07-23 05:36:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:36:05,707 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-23 05:36:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:05,708 INFO L225 Difference]: With dead ends: 671 [2022-07-23 05:36:05,708 INFO L226 Difference]: Without dead ends: 599 [2022-07-23 05:36:05,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=485, Invalid=4306, Unknown=39, NotChecked=0, Total=4830 [2022-07-23 05:36:05,709 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 129 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:05,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 546 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 480 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-07-23 05:36:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-23 05:36:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 563. [2022-07-23 05:36:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 559 states have (on average 1.1234347048300537) internal successors, (628), 562 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 628 transitions. [2022-07-23 05:36:05,719 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 628 transitions. Word has length 55 [2022-07-23 05:36:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:05,719 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 628 transitions. [2022-07-23 05:36:05,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 628 transitions. [2022-07-23 05:36:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:36:05,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:05,720 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-07-23 05:36:05,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:05,935 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,SelfDestructingSolverStorable45 [2022-07-23 05:36:05,936 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:05,936 INFO L85 PathProgramCache]: Analyzing trace with hash 37563779, now seen corresponding path program 2 times [2022-07-23 05:36:05,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673417863] [2022-07-23 05:36:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:05,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673417863] [2022-07-23 05:36:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673417863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239034228] [2022-07-23 05:36:06,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:36:06,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:06,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:06,096 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) [2022-07-23 05:36:06,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:36:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:36:06,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-23 05:36:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:06,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:36:06,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:06,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:07,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:07,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239034228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:07,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:07,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2022-07-23 05:36:07,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090765938] [2022-07-23 05:36:07,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:07,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-23 05:36:07,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-23 05:36:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-07-23 05:36:07,205 INFO L87 Difference]: Start difference. First operand 563 states and 628 transitions. Second operand has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:08,988 INFO L93 Difference]: Finished difference Result 818 states and 891 transitions. [2022-07-23 05:36:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:36:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-23 05:36:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:08,990 INFO L225 Difference]: With dead ends: 818 [2022-07-23 05:36:08,990 INFO L226 Difference]: Without dead ends: 814 [2022-07-23 05:36:08,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2022-07-23 05:36:08,991 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 612 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:08,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 668 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:36:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-07-23 05:36:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 548. [2022-07-23 05:36:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 544 states have (on average 1.1286764705882353) internal successors, (614), 547 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 614 transitions. [2022-07-23 05:36:08,997 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 614 transitions. Word has length 56 [2022-07-23 05:36:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:08,997 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 614 transitions. [2022-07-23 05:36:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 614 transitions. [2022-07-23 05:36:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:36:08,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:08,998 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:09,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:09,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-23 05:36:09,211 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1540257805, now seen corresponding path program 13 times [2022-07-23 05:36:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803432779] [2022-07-23 05:36:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:09,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803432779] [2022-07-23 05:36:09,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803432779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887099788] [2022-07-23 05:36:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:36:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:09,455 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) [2022-07-23 05:36:09,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:36:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-23 05:36:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:09,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:36:09,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:10,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:10,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:10,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887099788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:10,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:10,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-07-23 05:36:10,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646155840] [2022-07-23 05:36:10,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:10,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-23 05:36:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:10,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-23 05:36:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2722, Unknown=0, NotChecked=0, Total=3080 [2022-07-23 05:36:10,726 INFO L87 Difference]: Start difference. First operand 548 states and 614 transitions. Second operand has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:12,373 INFO L93 Difference]: Finished difference Result 1083 states and 1178 transitions. [2022-07-23 05:36:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:36:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-23 05:36:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:12,375 INFO L225 Difference]: With dead ends: 1083 [2022-07-23 05:36:12,376 INFO L226 Difference]: Without dead ends: 1063 [2022-07-23 05:36:12,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1178, Invalid=5142, Unknown=0, NotChecked=0, Total=6320 [2022-07-23 05:36:12,376 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 692 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:12,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1571 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:36:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-07-23 05:36:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 598. [2022-07-23 05:36:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 594 states have (on average 1.1228956228956228) internal successors, (667), 597 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 667 transitions. [2022-07-23 05:36:12,383 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 667 transitions. Word has length 57 [2022-07-23 05:36:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:12,383 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 667 transitions. [2022-07-23 05:36:12,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 667 transitions. [2022-07-23 05:36:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-23 05:36:12,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:12,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:12,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-23 05:36:12,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:12,602 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:12,602 INFO L85 PathProgramCache]: Analyzing trace with hash 415651818, now seen corresponding path program 5 times [2022-07-23 05:36:12,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:12,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439151995] [2022-07-23 05:36:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:12,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:12,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439151995] [2022-07-23 05:36:12,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439151995] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590744598] [2022-07-23 05:36:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:12,967 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) [2022-07-23 05:36:12,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-23 05:36:13,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:36:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-23 05:36:13,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:13,136 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:13,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:36:13,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:36:13,516 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:13,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-23 05:36:13,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-23 05:36:13,747 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:13,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2022-07-23 05:36:13,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-23 05:36:13,911 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:13,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-07-23 05:36:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:14,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:15,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:15,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-23 05:36:15,029 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:15,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-23 05:36:15,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:36:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:15,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590744598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:15,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:15,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 60 [2022-07-23 05:36:15,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969210921] [2022-07-23 05:36:15,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:15,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-23 05:36:15,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-23 05:36:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3258, Unknown=3, NotChecked=0, Total=3540 [2022-07-23 05:36:15,626 INFO L87 Difference]: Start difference. First operand 598 states and 667 transitions. Second operand has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:18,121 INFO L93 Difference]: Finished difference Result 1183 states and 1263 transitions. [2022-07-23 05:36:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-23 05:36:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-23 05:36:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:18,123 INFO L225 Difference]: With dead ends: 1183 [2022-07-23 05:36:18,123 INFO L226 Difference]: Without dead ends: 938 [2022-07-23 05:36:18,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=992, Invalid=10976, Unknown=22, NotChecked=0, Total=11990 [2022-07-23 05:36:18,125 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 393 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:18,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 821 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 867 Invalid, 0 Unknown, 382 Unchecked, 0.4s Time] [2022-07-23 05:36:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-07-23 05:36:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 698. [2022-07-23 05:36:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 694 states have (on average 1.1123919308357348) internal successors, (772), 697 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 772 transitions. [2022-07-23 05:36:18,136 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 772 transitions. Word has length 57 [2022-07-23 05:36:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:18,136 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 772 transitions. [2022-07-23 05:36:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 772 transitions. [2022-07-23 05:36:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:36:18,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:18,137 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:18,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-23 05:36:18,345 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1575967116, now seen corresponding path program 14 times [2022-07-23 05:36:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893849899] [2022-07-23 05:36:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893849899] [2022-07-23 05:36:18,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893849899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437988981] [2022-07-23 05:36:18,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:36:18,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:18,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:18,668 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) [2022-07-23 05:36:18,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-23 05:36:18,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:36:18,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-23 05:36:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:18,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:19,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:36:19,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:36:19,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:36:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:19,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:19,313 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:36:19,318 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:19,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:36:19,323 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:19,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:36:19,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:36:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437988981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:19,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:19,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 40 [2022-07-23 05:36:19,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617705624] [2022-07-23 05:36:19,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:19,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-23 05:36:19,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-23 05:36:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1373, Unknown=1, NotChecked=74, Total=1560 [2022-07-23 05:36:19,537 INFO L87 Difference]: Start difference. First operand 698 states and 772 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:20,789 INFO L93 Difference]: Finished difference Result 1540 states and 1660 transitions. [2022-07-23 05:36:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-23 05:36:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-23 05:36:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:20,793 INFO L225 Difference]: With dead ends: 1540 [2022-07-23 05:36:20,793 INFO L226 Difference]: Without dead ends: 1475 [2022-07-23 05:36:20,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=2955, Unknown=1, NotChecked=110, Total=3306 [2022-07-23 05:36:20,793 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 344 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:20,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 2720 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2155 Invalid, 0 Unknown, 266 Unchecked, 0.8s Time] [2022-07-23 05:36:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2022-07-23 05:36:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 742. [2022-07-23 05:36:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 738 states have (on average 1.1165311653116532) internal successors, (824), 741 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 824 transitions. [2022-07-23 05:36:20,801 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 824 transitions. Word has length 59 [2022-07-23 05:36:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:20,802 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 824 transitions. [2022-07-23 05:36:20,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 824 transitions. [2022-07-23 05:36:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:36:20,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:20,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:20,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:21,011 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,SelfDestructingSolverStorable49 [2022-07-23 05:36:21,011 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -105949010, now seen corresponding path program 5 times [2022-07-23 05:36:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:21,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275563586] [2022-07-23 05:36:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:21,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:21,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:21,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275563586] [2022-07-23 05:36:21,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275563586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:21,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584203255] [2022-07-23 05:36:21,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:21,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:21,148 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) [2022-07-23 05:36:21,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-23 05:36:21,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:36:21,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:36:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:21,301 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:21,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:36:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:21,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:21,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584203255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:21,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:21,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-23 05:36:21,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574391918] [2022-07-23 05:36:21,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:21,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:36:21,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:36:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:36:21,916 INFO L87 Difference]: Start difference. First operand 742 states and 824 transitions. Second operand has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:22,403 INFO L93 Difference]: Finished difference Result 932 states and 1009 transitions. [2022-07-23 05:36:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:36:22,403 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-23 05:36:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:22,405 INFO L225 Difference]: With dead ends: 932 [2022-07-23 05:36:22,405 INFO L226 Difference]: Without dead ends: 932 [2022-07-23 05:36:22,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 05:36:22,406 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 231 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:22,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 419 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:36:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-07-23 05:36:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 727. [2022-07-23 05:36:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 723 states have (on average 1.1175656984785616) internal successors, (808), 726 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 808 transitions. [2022-07-23 05:36:22,411 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 808 transitions. Word has length 59 [2022-07-23 05:36:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:22,411 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 808 transitions. [2022-07-23 05:36:22,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 808 transitions. [2022-07-23 05:36:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-23 05:36:22,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:22,413 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-07-23 05:36:22,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-23 05:36:22,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:22,627 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 3 times [2022-07-23 05:36:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:22,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853022104] [2022-07-23 05:36:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853022104] [2022-07-23 05:36:22,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853022104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576928552] [2022-07-23 05:36:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:22,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:22,843 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) [2022-07-23 05:36:22,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-23 05:36:22,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 05:36:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:36:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:23,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:36:23,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:23,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576928552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:24,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:24,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-07-23 05:36:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602015212] [2022-07-23 05:36:24,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:36:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:36:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:36:24,181 INFO L87 Difference]: Start difference. First operand 727 states and 808 transitions. Second operand has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:27,365 INFO L93 Difference]: Finished difference Result 1232 states and 1324 transitions. [2022-07-23 05:36:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-23 05:36:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-23 05:36:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:27,368 INFO L225 Difference]: With dead ends: 1232 [2022-07-23 05:36:27,368 INFO L226 Difference]: Without dead ends: 1199 [2022-07-23 05:36:27,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1882, Invalid=8018, Unknown=0, NotChecked=0, Total=9900 [2022-07-23 05:36:27,370 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 708 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:27,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1004 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 05:36:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-07-23 05:36:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 695. [2022-07-23 05:36:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 691 states have (on average 1.1186685962373373) internal successors, (773), 694 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 773 transitions. [2022-07-23 05:36:27,377 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 773 transitions. Word has length 62 [2022-07-23 05:36:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:27,378 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 773 transitions. [2022-07-23 05:36:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 773 transitions. [2022-07-23 05:36:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-23 05:36:27,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:27,379 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:27,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:27,598 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1265880983, now seen corresponding path program 15 times [2022-07-23 05:36:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:27,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802949452] [2022-07-23 05:36:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802949452] [2022-07-23 05:36:28,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802949452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662765952] [2022-07-23 05:36:28,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:28,010 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) [2022-07-23 05:36:28,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-23 05:36:28,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-23 05:36:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-23 05:36:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:28,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:28,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:36:28,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:29,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 120 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:29,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662765952] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:29,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:29,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 64 [2022-07-23 05:36:29,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588877591] [2022-07-23 05:36:29,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:29,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-23 05:36:29,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-23 05:36:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3686, Unknown=0, NotChecked=0, Total=4160 [2022-07-23 05:36:29,707 INFO L87 Difference]: Start difference. First operand 695 states and 773 transitions. Second operand has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:33,559 INFO L93 Difference]: Finished difference Result 1624 states and 1747 transitions. [2022-07-23 05:36:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-23 05:36:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-23 05:36:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:33,563 INFO L225 Difference]: With dead ends: 1624 [2022-07-23 05:36:33,563 INFO L226 Difference]: Without dead ends: 1598 [2022-07-23 05:36:33,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2644, Invalid=10238, Unknown=0, NotChecked=0, Total=12882 [2022-07-23 05:36:33,564 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1232 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:33,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1579 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 05:36:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-07-23 05:36:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 759. [2022-07-23 05:36:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 755 states have (on average 1.1125827814569536) internal successors, (840), 758 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 840 transitions. [2022-07-23 05:36:33,572 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 840 transitions. Word has length 63 [2022-07-23 05:36:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:33,572 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 840 transitions. [2022-07-23 05:36:33,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 840 transitions. [2022-07-23 05:36:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-23 05:36:33,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:33,573 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:33,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-23 05:36:33,787 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,SelfDestructingSolverStorable52 [2022-07-23 05:36:33,788 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash -749215359, now seen corresponding path program 1 times [2022-07-23 05:36:33,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:33,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853771826] [2022-07-23 05:36:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:33,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:33,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:33,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853771826] [2022-07-23 05:36:33,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853771826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:33,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316184514] [2022-07-23 05:36:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:33,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:33,997 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) [2022-07-23 05:36:33,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-23 05:36:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-23 05:36:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:34,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:36:34,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:34,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:35,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:36:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316184514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:35,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 48 [2022-07-23 05:36:35,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945207502] [2022-07-23 05:36:35,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:35,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-23 05:36:35,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-23 05:36:35,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 05:36:35,489 INFO L87 Difference]: Start difference. First operand 759 states and 840 transitions. Second operand has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:37,468 INFO L93 Difference]: Finished difference Result 1201 states and 1293 transitions. [2022-07-23 05:36:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:36:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-23 05:36:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:37,471 INFO L225 Difference]: With dead ends: 1201 [2022-07-23 05:36:37,471 INFO L226 Difference]: Without dead ends: 1201 [2022-07-23 05:36:37,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1901, Invalid=6471, Unknown=0, NotChecked=0, Total=8372 [2022-07-23 05:36:37,472 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 787 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:37,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 369 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:36:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-07-23 05:36:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 771. [2022-07-23 05:36:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 767 states have (on average 1.1160365058670143) internal successors, (856), 770 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 856 transitions. [2022-07-23 05:36:37,478 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 856 transitions. Word has length 64 [2022-07-23 05:36:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:37,478 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 856 transitions. [2022-07-23 05:36:37,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 856 transitions. [2022-07-23 05:36:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-23 05:36:37,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:37,480 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:37,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:37,680 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1035879294, now seen corresponding path program 16 times [2022-07-23 05:36:37,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:37,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837913535] [2022-07-23 05:36:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:37,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 27 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:38,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837913535] [2022-07-23 05:36:38,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837913535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523729087] [2022-07-23 05:36:38,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:38,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:38,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:38,040 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) [2022-07-23 05:36:38,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-23 05:36:38,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 05:36:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:38,189 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:38,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:36:38,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:38,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-23 05:36:38,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-23 05:36:39,334 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:39,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-23 05:36:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:39,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:40,071 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:40,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-23 05:36:40,077 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:40,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-23 05:36:40,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-23 05:36:41,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:41,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 76 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:41,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523729087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:41,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:41,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 73 [2022-07-23 05:36:41,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113270287] [2022-07-23 05:36:41,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:41,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-23 05:36:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-23 05:36:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4799, Unknown=1, NotChecked=0, Total=5256 [2022-07-23 05:36:41,135 INFO L87 Difference]: Start difference. First operand 771 states and 856 transitions. Second operand has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:43,802 INFO L93 Difference]: Finished difference Result 1966 states and 2108 transitions. [2022-07-23 05:36:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-23 05:36:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-23 05:36:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:43,807 INFO L225 Difference]: With dead ends: 1966 [2022-07-23 05:36:43,807 INFO L226 Difference]: Without dead ends: 1872 [2022-07-23 05:36:43,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=931, Invalid=10840, Unknown=1, NotChecked=0, Total=11772 [2022-07-23 05:36:43,808 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 336 mSDsluCounter, 4912 mSDsCounter, 0 mSdLazyCounter, 3370 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 5061 SdHoareTripleChecker+Invalid, 3869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:43,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 5061 Invalid, 3869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3370 Invalid, 0 Unknown, 443 Unchecked, 1.3s Time] [2022-07-23 05:36:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-07-23 05:36:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 817. [2022-07-23 05:36:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.120541205412054) internal successors, (911), 816 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 911 transitions. [2022-07-23 05:36:43,817 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 911 transitions. Word has length 65 [2022-07-23 05:36:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:43,817 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 911 transitions. [2022-07-23 05:36:43,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 911 transitions. [2022-07-23 05:36:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-23 05:36:43,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:43,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:43,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:44,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-23 05:36:44,030 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash 229195360, now seen corresponding path program 6 times [2022-07-23 05:36:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:44,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240247808] [2022-07-23 05:36:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:44,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240247808] [2022-07-23 05:36:44,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240247808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:44,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075820581] [2022-07-23 05:36:44,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:36:44,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:44,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:44,584 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:44,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-23 05:36:44,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:36:44,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:44,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-23 05:36:44,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:44,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:36:45,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:36:45,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 05:36:45,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 05:36:45,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 05:36:45,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:45,548 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:45,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-23 05:36:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:45,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:45,562 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:36:45,567 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-23 05:36:45,577 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:36:45,623 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 3 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) 0) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)))) is different from false [2022-07-23 05:36:45,645 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|))) is different from false [2022-07-23 05:36:45,655 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:45,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-23 05:36:45,661 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:45,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-23 05:36:45,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:36:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 33 not checked. [2022-07-23 05:36:46,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075820581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:46,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:46,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 21] total 58 [2022-07-23 05:36:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636849355] [2022-07-23 05:36:46,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-23 05:36:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-23 05:36:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2486, Unknown=5, NotChecked=530, Total=3306 [2022-07-23 05:36:46,337 INFO L87 Difference]: Start difference. First operand 817 states and 911 transitions. Second operand has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:47,294 INFO L93 Difference]: Finished difference Result 841 states and 934 transitions. [2022-07-23 05:36:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:36:47,294 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-23 05:36:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:47,296 INFO L225 Difference]: With dead ends: 841 [2022-07-23 05:36:47,296 INFO L226 Difference]: Without dead ends: 817 [2022-07-23 05:36:47,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=445, Invalid=3992, Unknown=5, NotChecked=670, Total=5112 [2022-07-23 05:36:47,297 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:47,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 610 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 943 Invalid, 0 Unknown, 318 Unchecked, 0.4s Time] [2022-07-23 05:36:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-07-23 05:36:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-07-23 05:36:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.119311193111931) internal successors, (910), 816 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 910 transitions. [2022-07-23 05:36:47,303 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 910 transitions. Word has length 65 [2022-07-23 05:36:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:47,303 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 910 transitions. [2022-07-23 05:36:47,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 910 transitions. [2022-07-23 05:36:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 05:36:47,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:47,304 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:47,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:47,522 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash -85875271, now seen corresponding path program 6 times [2022-07-23 05:36:47,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:47,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801153967] [2022-07-23 05:36:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:48,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801153967] [2022-07-23 05:36:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801153967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553932537] [2022-07-23 05:36:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:36:48,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:48,104 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:48,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-23 05:36:48,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:36:48,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 119 conjunts are in the unsatisfiable core [2022-07-23 05:36:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:48,300 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:48,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:36:48,312 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:36:48,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-07-23 05:36:48,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-23 05:36:49,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-23 05:36:49,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2022-07-23 05:36:49,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-23 05:36:49,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-07-23 05:36:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:49,711 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:49,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-07-23 05:36:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:49,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:50,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)))) is different from false [2022-07-23 05:36:50,284 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (< (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|))) is different from false [2022-07-23 05:36:50,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:50,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2022-07-23 05:36:50,922 INFO L356 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2022-07-23 05:36:50,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 32 treesize of output 37 [2022-07-23 05:36:50,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:50,940 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:50,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 44 [2022-07-23 05:36:50,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-23 05:36:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 23 not checked. [2022-07-23 05:36:52,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553932537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:52,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:52,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 27] total 78 [2022-07-23 05:36:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60983106] [2022-07-23 05:36:52,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-23 05:36:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-23 05:36:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=5320, Unknown=2, NotChecked=298, Total=6006 [2022-07-23 05:36:52,559 INFO L87 Difference]: Start difference. First operand 817 states and 910 transitions. Second operand has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:59,070 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (< (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|))))) (and .cse0 (or .cse0 (not (= (select |c_#valid| |c_ULTIMATE.start_cstrncat_#t~post4#1.base|) 1))))) is different from false [2022-07-23 05:37:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:03,255 INFO L93 Difference]: Finished difference Result 1023 states and 1116 transitions. [2022-07-23 05:37:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-23 05:37:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-23 05:37:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:03,257 INFO L225 Difference]: With dead ends: 1023 [2022-07-23 05:37:03,257 INFO L226 Difference]: Without dead ends: 926 [2022-07-23 05:37:03,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4313 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1654, Invalid=16443, Unknown=5, NotChecked=804, Total=18906 [2022-07-23 05:37:03,257 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 579 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1009 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:03,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1085 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1818 Invalid, 0 Unknown, 1009 Unchecked, 0.9s Time] [2022-07-23 05:37:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-07-23 05:37:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 843. [2022-07-23 05:37:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 839 states have (on average 1.1108462455303934) internal successors, (932), 842 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 932 transitions. [2022-07-23 05:37:03,264 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 932 transitions. Word has length 67 [2022-07-23 05:37:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:03,264 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 932 transitions. [2022-07-23 05:37:03,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 932 transitions. [2022-07-23 05:37:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 05:37:03,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:03,265 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 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] [2022-07-23 05:37:03,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:03,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-23 05:37:03,479 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1839858857, now seen corresponding path program 4 times [2022-07-23 05:37:03,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:03,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838172460] [2022-07-23 05:37:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:37:03,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838172460] [2022-07-23 05:37:03,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838172460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722203555] [2022-07-23 05:37:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:37:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:03,680 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:37:03,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-23 05:37:03,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:37:03,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:03,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-23 05:37:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:03,816 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:03,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:04,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-23 05:37:04,139 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:04,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-07-23 05:37:04,143 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-23 05:37:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:04,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-23 05:37:04,344 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:298) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:284) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-23 05:37:04,347 INFO L158 Benchmark]: Toolchain (without parser) took 141393.79ms. Allocated memory was 121.6MB in the beginning and 255.9MB in the end (delta: 134.2MB). Free memory was 93.3MB in the beginning and 99.4MB in the end (delta: -6.0MB). Peak memory consumption was 128.5MB. Max. memory is 16.1GB. [2022-07-23 05:37:04,347 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 79.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 05:37:04,347 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.56ms. Allocated memory is still 121.6MB. Free memory was 93.1MB in the beginning and 90.3MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-23 05:37:04,347 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.79ms. Allocated memory is still 121.6MB. Free memory was 90.3MB in the beginning and 88.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 05:37:04,348 INFO L158 Benchmark]: Boogie Preprocessor took 25.02ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 86.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 05:37:04,348 INFO L158 Benchmark]: RCFGBuilder took 469.54ms. Allocated memory is still 121.6MB. Free memory was 86.8MB in the beginning and 72.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-23 05:37:04,348 INFO L158 Benchmark]: TraceAbstraction took 140502.48ms. Allocated memory was 121.6MB in the beginning and 255.9MB in the end (delta: 134.2MB). Free memory was 71.7MB in the beginning and 99.4MB in the end (delta: -27.7MB). Peak memory consumption was 109.2MB. Max. memory is 16.1GB. [2022-07-23 05:37:04,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 79.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.56ms. Allocated memory is still 121.6MB. Free memory was 93.1MB in the beginning and 90.3MB in the end (delta: 2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.79ms. Allocated memory is still 121.6MB. Free memory was 90.3MB in the beginning and 88.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.02ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 86.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 469.54ms. Allocated memory is still 121.6MB. Free memory was 86.8MB in the beginning and 72.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 140502.48ms. Allocated memory was 121.6MB in the beginning and 255.9MB in the end (delta: 134.2MB). Free memory was 71.7MB in the beginning and 99.4MB in the end (delta: -27.7MB). Peak memory consumption was 109.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-23 05:37:04,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:37:06,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:37:06,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:37:06,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:37:06,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:37:06,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:37:06,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:37:06,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:37:06,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:37:06,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:37:06,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:37:06,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:37:06,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:37:06,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:37:06,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:37:06,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:37:06,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:37:06,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:37:06,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:37:06,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:37:06,103 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:37:06,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:37:06,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:37:06,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:37:06,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:37:06,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:37:06,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:37:06,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:37:06,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:37:06,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:37:06,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:37:06,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:37:06,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:37:06,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:37:06,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:37:06,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:37:06,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:37:06,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:37:06,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:37:06,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:37:06,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:37:06,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:37:06,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 05:37:06,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:37:06,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:37:06,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:37:06,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:37:06,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:37:06,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:37:06,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:37:06,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:37:06,150 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:37:06,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:37:06,151 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:37:06,151 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:37:06,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:37:06,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:37:06,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:37:06,152 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:37:06,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:37:06,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:37:06,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:37:06,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:37:06,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:37:06,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:37:06,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:37:06,160 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 05:37:06,160 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 05:37:06,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 05:37:06,161 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2022-07-23 05:37:06,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:37:06,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:37:06,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:37:06,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:37:06,470 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:37:06,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-23 05:37:06,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2e38dcf/681dae69be384abb8721075361a64551/FLAGe043d5582 [2022-07-23 05:37:06,917 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:37:06,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-23 05:37:06,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2e38dcf/681dae69be384abb8721075361a64551/FLAGe043d5582 [2022-07-23 05:37:06,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2e38dcf/681dae69be384abb8721075361a64551 [2022-07-23 05:37:06,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:37:06,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:37:06,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:37:06,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:37:06,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:37:06,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:37:06" (1/1) ... [2022-07-23 05:37:06,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a99f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:06, skipping insertion in model container [2022-07-23 05:37:06,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:37:06" (1/1) ... [2022-07-23 05:37:06,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:37:06,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:37:07,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:37:07,224 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:37:07,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:37:07,290 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:37:07,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07 WrapperNode [2022-07-23 05:37:07,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:37:07,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:37:07,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:37:07,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:37:07,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,350 INFO L137 Inliner]: procedures = 118, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-23 05:37:07,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:37:07,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:37:07,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:37:07,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:37:07,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:37:07,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:37:07,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:37:07,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:37:07,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (1/1) ... [2022-07-23 05:37:07,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:37:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:07,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 05:37:07,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 05:37:07,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 05:37:07,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:37:07,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-23 05:37:07,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:37:07,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:37:07,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:37:07,574 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:37:07,576 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:37:07,843 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:37:07,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:37:07,848 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 05:37:07,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:37:07 BoogieIcfgContainer [2022-07-23 05:37:07,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:37:07,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:37:07,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:37:07,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:37:07,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:37:06" (1/3) ... [2022-07-23 05:37:07,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718e33fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:37:07, skipping insertion in model container [2022-07-23 05:37:07,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:37:07" (2/3) ... [2022-07-23 05:37:07,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718e33fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:37:07, skipping insertion in model container [2022-07-23 05:37:07,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:37:07" (3/3) ... [2022-07-23 05:37:07,854 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2022-07-23 05:37:07,864 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:37:07,865 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-23 05:37:07,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:37:07,908 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6f9441de, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71893de0 [2022-07-23 05:37:07,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-23 05:37:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:37:07,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:07,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:07,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:07,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2022-07-23 05:37:07,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791557550] [2022-07-23 05:37:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:07,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:07,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:07,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 05:37:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 05:37:08,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:08,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:08,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791557550] [2022-07-23 05:37:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791557550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:08,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:08,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:37:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97682329] [2022-07-23 05:37:08,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:08,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:37:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:37:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:37:08,067 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:08,145 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-23 05:37:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:37:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:37:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:08,153 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:37:08,153 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:37:08,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:37:08,158 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:08,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:37:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:37:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-23 05:37:08,188 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-23 05:37:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:08,188 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-23 05:37:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-23 05:37:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:37:08,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:08,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:08,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:08,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-23 05:37:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:08,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953875871] [2022-07-23 05:37:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:08,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:08,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:08,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 05:37:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:37:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:08,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:08,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953875871] [2022-07-23 05:37:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953875871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:08,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:08,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:08,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607234120] [2022-07-23 05:37:08,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:08,508 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:08,612 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2022-07-23 05:37:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:37:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:08,615 INFO L225 Difference]: With dead ends: 147 [2022-07-23 05:37:08,615 INFO L226 Difference]: Without dead ends: 146 [2022-07-23 05:37:08,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:08,616 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:08,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 187 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-23 05:37:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 53. [2022-07-23 05:37:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-23 05:37:08,622 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 8 [2022-07-23 05:37:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:08,622 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-23 05:37:08,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-23 05:37:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:37:08,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:08,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:08,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:08,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:08,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 121448497, now seen corresponding path program 1 times [2022-07-23 05:37:08,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:08,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859220988] [2022-07-23 05:37:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:08,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:08,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:08,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 05:37:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:37:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:08,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:08,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859220988] [2022-07-23 05:37:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859220988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:08,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:08,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:08,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483140953] [2022-07-23 05:37:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:08,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:08,915 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:09,010 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-23 05:37:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:37:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:09,011 INFO L225 Difference]: With dead ends: 95 [2022-07-23 05:37:09,012 INFO L226 Difference]: Without dead ends: 95 [2022-07-23 05:37:09,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:09,013 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 47 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:09,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 198 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-23 05:37:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2022-07-23 05:37:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-07-23 05:37:09,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 8 [2022-07-23 05:37:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:09,018 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-07-23 05:37:09,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-07-23 05:37:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:37:09,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:09,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:09,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:09,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:09,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-23 05:37:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:09,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271032770] [2022-07-23 05:37:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:09,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:09,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:09,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 05:37:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:37:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:09,289 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 05:37:09,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-07-23 05:37:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:09,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:09,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:09,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271032770] [2022-07-23 05:37:09,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271032770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:09,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:09,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:37:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258138846] [2022-07-23 05:37:09,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:37:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:37:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:37:09,323 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:09,398 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-07-23 05:37:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:37:09,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:37:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:09,399 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:37:09,399 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:37:09,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:37:09,400 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:09,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:37:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-23 05:37:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-23 05:37:09,403 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 8 [2022-07-23 05:37:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:09,404 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-23 05:37:09,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-23 05:37:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:37:09,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:09,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:09,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-23 05:37:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:09,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-23 05:37:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930953633] [2022-07-23 05:37:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:09,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:09,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:09,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 05:37:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:09,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:37:09,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:09,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:09,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:09,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:09,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:09,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930953633] [2022-07-23 05:37:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930953633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:09,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:09,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:37:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265955663] [2022-07-23 05:37:09,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:37:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:37:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:37:09,732 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:09,914 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2022-07-23 05:37:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:37:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:37:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:09,915 INFO L225 Difference]: With dead ends: 96 [2022-07-23 05:37:09,915 INFO L226 Difference]: Without dead ends: 96 [2022-07-23 05:37:09,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:09,916 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 142 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:09,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:37:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-23 05:37:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 56. [2022-07-23 05:37:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-07-23 05:37:09,920 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 8 [2022-07-23 05:37:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:09,920 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-07-23 05:37:09,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-07-23 05:37:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:09,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:09,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:09,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-23 05:37:10,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:10,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash 747838313, now seen corresponding path program 1 times [2022-07-23 05:37:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:10,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318207957] [2022-07-23 05:37:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:10,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:10,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:10,126 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:10,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 05:37:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:10,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:37:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:10,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:10,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:10,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318207957] [2022-07-23 05:37:10,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318207957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:10,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:10,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:10,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859870573] [2022-07-23 05:37:10,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:10,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:10,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:10,218 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:10,278 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-23 05:37:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:10,280 INFO L225 Difference]: With dead ends: 95 [2022-07-23 05:37:10,280 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 05:37:10,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:10,281 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:10,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 145 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 05:37:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-07-23 05:37:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-23 05:37:10,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 10 [2022-07-23 05:37:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:10,289 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-23 05:37:10,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-23 05:37:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:10,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:10,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:10,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:10,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:10,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1829379923, now seen corresponding path program 1 times [2022-07-23 05:37:10,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:10,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388056345] [2022-07-23 05:37:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:10,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:10,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:10,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 05:37:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:37:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:10,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:10,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:10,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388056345] [2022-07-23 05:37:10,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388056345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:10,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:10,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921252232] [2022-07-23 05:37:10,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:10,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:10,565 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:10,633 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-07-23 05:37:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:10,634 INFO L225 Difference]: With dead ends: 94 [2022-07-23 05:37:10,634 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 05:37:10,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:10,635 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:10,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 176 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 05:37:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-07-23 05:37:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-23 05:37:10,638 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 10 [2022-07-23 05:37:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:10,638 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-23 05:37:10,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-23 05:37:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:10,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:10,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:10,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:10,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:10,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121621, now seen corresponding path program 1 times [2022-07-23 05:37:10,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:10,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220618417] [2022-07-23 05:37:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:10,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:10,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:10,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 05:37:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:10,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:37:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:10,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:10,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220618417] [2022-07-23 05:37:10,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220618417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808605541] [2022-07-23 05:37:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:10,924 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:10,954 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-07-23 05:37:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:10,956 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:37:10,956 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:37:10,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:10,957 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:10,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 106 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:37:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:37:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-23 05:37:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-23 05:37:10,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 10 [2022-07-23 05:37:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:10,959 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-23 05:37:10,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-23 05:37:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:10,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:10,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:10,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-23 05:37:11,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:11,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:11,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-23 05:37:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:11,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186053017] [2022-07-23 05:37:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:11,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:11,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:11,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:11,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 05:37:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:11,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:37:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:11,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:11,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:11,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:11,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186053017] [2022-07-23 05:37:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186053017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:11,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:11,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:37:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374296037] [2022-07-23 05:37:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:37:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:37:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:37:11,398 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:11,907 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2022-07-23 05:37:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:37:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:11,908 INFO L225 Difference]: With dead ends: 183 [2022-07-23 05:37:11,908 INFO L226 Difference]: Without dead ends: 183 [2022-07-23 05:37:11,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:37:11,909 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 380 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:11,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 213 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:37:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-23 05:37:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 60. [2022-07-23 05:37:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.697674418604651) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-07-23 05:37:11,912 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 10 [2022-07-23 05:37:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:11,912 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-07-23 05:37:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-07-23 05:37:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:11,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:11,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:11,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-23 05:37:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:12,119 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2022-07-23 05:37:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:12,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204230681] [2022-07-23 05:37:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:12,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:12,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:12,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 05:37:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:37:12,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:12,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:12,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:12,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204230681] [2022-07-23 05:37:12,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204230681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:12,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:12,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:37:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232431775] [2022-07-23 05:37:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:37:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:37:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:37:12,193 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:12,232 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-07-23 05:37:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:37:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:12,233 INFO L225 Difference]: With dead ends: 98 [2022-07-23 05:37:12,233 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:37:12,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:37:12,234 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:12,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:37:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:37:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2022-07-23 05:37:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-23 05:37:12,237 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 10 [2022-07-23 05:37:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:12,237 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-23 05:37:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-23 05:37:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:12,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:12,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:12,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:12,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:12,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash -61508313, now seen corresponding path program 1 times [2022-07-23 05:37:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:12,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089032895] [2022-07-23 05:37:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:12,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:12,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 05:37:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:37:12,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:12,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:12,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:12,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:12,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089032895] [2022-07-23 05:37:12,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089032895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:12,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:12,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:37:12,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914461054] [2022-07-23 05:37:12,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:12,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:37:12,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:37:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:37:12,703 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:13,145 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2022-07-23 05:37:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:37:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:13,147 INFO L225 Difference]: With dead ends: 132 [2022-07-23 05:37:13,147 INFO L226 Difference]: Without dead ends: 132 [2022-07-23 05:37:13,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:37:13,148 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 208 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:13,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 218 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:37:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-23 05:37:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 64. [2022-07-23 05:37:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-07-23 05:37:13,150 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2022-07-23 05:37:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:13,150 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-07-23 05:37:13,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-07-23 05:37:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:13,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:13,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:13,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:13,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240747, now seen corresponding path program 1 times [2022-07-23 05:37:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605969740] [2022-07-23 05:37:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:13,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:13,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:13,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 05:37:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:37:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:13,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:13,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:13,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:13,707 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:13,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605969740] [2022-07-23 05:37:13,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605969740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:13,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:13,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:37:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563948045] [2022-07-23 05:37:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:13,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:37:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:37:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:37:13,708 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:14,221 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2022-07-23 05:37:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:37:14,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:14,222 INFO L225 Difference]: With dead ends: 158 [2022-07-23 05:37:14,222 INFO L226 Difference]: Without dead ends: 158 [2022-07-23 05:37:14,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:37:14,223 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 188 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:14,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 197 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-23 05:37:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-23 05:37:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 66. [2022-07-23 05:37:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-23 05:37:14,225 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 10 [2022-07-23 05:37:14,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:14,225 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-23 05:37:14,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-23 05:37:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:37:14,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:14,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:14,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:14,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1713499049, now seen corresponding path program 1 times [2022-07-23 05:37:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:14,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801885717] [2022-07-23 05:37:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:14,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:14,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:14,428 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:14,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 05:37:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:37:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:14,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:14,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:14,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:14,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801885717] [2022-07-23 05:37:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801885717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:14,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:14,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:37:14,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37983125] [2022-07-23 05:37:14,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:14,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:37:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:37:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:37:14,863 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:15,211 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-07-23 05:37:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:37:15,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:37:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:15,213 INFO L225 Difference]: With dead ends: 111 [2022-07-23 05:37:15,213 INFO L226 Difference]: Without dead ends: 111 [2022-07-23 05:37:15,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:37:15,214 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 110 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:15,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 161 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-07-23 05:37:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-23 05:37:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2022-07-23 05:37:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-07-23 05:37:15,216 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2022-07-23 05:37:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:15,216 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-07-23 05:37:15,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-07-23 05:37:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:37:15,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:15,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:15,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:15,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2022-07-23 05:37:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130904169] [2022-07-23 05:37:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:15,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:15,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:15,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 05:37:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:15,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:37:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:15,473 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:37:15,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-23 05:37:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:15,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:15,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:15,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130904169] [2022-07-23 05:37:15,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130904169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:15,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:15,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:37:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774872552] [2022-07-23 05:37:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:15,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:37:15,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:37:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:37:15,485 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:15,546 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-07-23 05:37:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:37:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:37:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:15,546 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:37:15,546 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:37:15,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:37:15,547 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:15,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:37:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-23 05:37:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.574468085106383) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-07-23 05:37:15,549 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2022-07-23 05:37:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:15,549 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-07-23 05:37:15,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-07-23 05:37:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:37:15,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:15,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:15,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:15,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:15,756 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2022-07-23 05:37:15,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:15,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536834894] [2022-07-23 05:37:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:15,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:15,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:15,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:15,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 05:37:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:37:15,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:15,817 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:15,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:15,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:15,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536834894] [2022-07-23 05:37:15,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536834894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:15,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:15,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:37:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997943805] [2022-07-23 05:37:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:37:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:15,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:37:15,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:37:15,849 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:15,911 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-23 05:37:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:37:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:37:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:15,912 INFO L225 Difference]: With dead ends: 95 [2022-07-23 05:37:15,912 INFO L226 Difference]: Without dead ends: 95 [2022-07-23 05:37:15,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:37:15,913 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:15,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 84 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-23 05:37:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2022-07-23 05:37:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-07-23 05:37:15,915 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 11 [2022-07-23 05:37:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:15,915 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-07-23 05:37:15,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-07-23 05:37:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:37:15,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:15,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:15,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:16,123 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -196144391, now seen corresponding path program 1 times [2022-07-23 05:37:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:16,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862157739] [2022-07-23 05:37:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:16,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:16,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:16,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:16,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 05:37:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:37:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:16,210 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:16,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:16,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:16,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862157739] [2022-07-23 05:37:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862157739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:16,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:16,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:37:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957924268] [2022-07-23 05:37:16,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:37:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:37:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:37:16,342 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:16,512 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-07-23 05:37:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:37:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:37:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:16,514 INFO L225 Difference]: With dead ends: 102 [2022-07-23 05:37:16,514 INFO L226 Difference]: Without dead ends: 102 [2022-07-23 05:37:16,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:37:16,515 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 57 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:16,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 139 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-07-23 05:37:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-23 05:37:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2022-07-23 05:37:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.537037037037037) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-23 05:37:16,517 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 11 [2022-07-23 05:37:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:16,518 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-23 05:37:16,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-23 05:37:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:37:16,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:16,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:16,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:16,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1578862971, now seen corresponding path program 1 times [2022-07-23 05:37:16,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:16,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482335594] [2022-07-23 05:37:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:16,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:16,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:16,726 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:16,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 05:37:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:16,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:37:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:16,787 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:16,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:16,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:16,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:16,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482335594] [2022-07-23 05:37:16,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482335594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:16,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:16,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197204969] [2022-07-23 05:37:16,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:37:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:37:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:37:16,850 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:17,035 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2022-07-23 05:37:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:37:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-23 05:37:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:17,037 INFO L225 Difference]: With dead ends: 101 [2022-07-23 05:37:17,037 INFO L226 Difference]: Without dead ends: 101 [2022-07-23 05:37:17,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:37:17,038 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:17,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:37:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-23 05:37:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-07-23 05:37:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-23 05:37:17,040 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 11 [2022-07-23 05:37:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:17,040 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-23 05:37:17,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-23 05:37:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:37:17,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:17,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:17,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:17,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:17,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-23 05:37:17,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:17,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755094755] [2022-07-23 05:37:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:17,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:17,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:17,248 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:17,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 05:37:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:17,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:37:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:17,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:17,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:17,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:18,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755094755] [2022-07-23 05:37:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755094755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:18,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:18,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-23 05:37:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9174427] [2022-07-23 05:37:18,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:37:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:37:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:37:18,166 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:20,713 INFO L93 Difference]: Finished difference Result 283 states and 330 transitions. [2022-07-23 05:37:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:37:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-23 05:37:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:20,715 INFO L225 Difference]: With dead ends: 283 [2022-07-23 05:37:20,715 INFO L226 Difference]: Without dead ends: 283 [2022-07-23 05:37:20,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:37:20,716 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 680 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:20,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 355 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-23 05:37:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-23 05:37:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 98. [2022-07-23 05:37:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 97 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2022-07-23 05:37:20,719 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 12 [2022-07-23 05:37:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:20,719 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2022-07-23 05:37:20,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2022-07-23 05:37:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:37:20,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:20,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:20,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:20,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:20,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:20,921 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2022-07-23 05:37:20,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:20,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776463517] [2022-07-23 05:37:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:20,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:20,922 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:20,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 05:37:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:37:20,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:20,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:20,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776463517] [2022-07-23 05:37:20,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776463517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:20,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:20,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:37:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696093845] [2022-07-23 05:37:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:20,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:37:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:37:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:37:20,989 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:21,052 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-07-23 05:37:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:37:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:37:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:21,052 INFO L225 Difference]: With dead ends: 94 [2022-07-23 05:37:21,052 INFO L226 Difference]: Without dead ends: 94 [2022-07-23 05:37:21,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:21,053 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:21,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-23 05:37:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-23 05:37:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 93 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-07-23 05:37:21,055 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 13 [2022-07-23 05:37:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:21,055 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-07-23 05:37:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-07-23 05:37:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:37:21,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:21,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:21,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:21,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:21,264 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2022-07-23 05:37:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133450996] [2022-07-23 05:37:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:21,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:21,265 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:21,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 05:37:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:37:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:21,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:21,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:21,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133450996] [2022-07-23 05:37:21,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133450996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:21,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:21,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:37:21,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10454347] [2022-07-23 05:37:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:21,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:37:21,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:37:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:37:21,425 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:21,511 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2022-07-23 05:37:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:37:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:37:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:21,512 INFO L225 Difference]: With dead ends: 131 [2022-07-23 05:37:21,512 INFO L226 Difference]: Without dead ends: 131 [2022-07-23 05:37:21,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:37:21,513 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:21,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 165 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-07-23 05:37:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-23 05:37:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-07-23 05:37:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 118 states have (on average 1.3728813559322033) internal successors, (162), 127 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-07-23 05:37:21,515 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 13 [2022-07-23 05:37:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:21,515 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-07-23 05:37:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-07-23 05:37:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:37:21,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:21,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:21,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:21,719 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1556886882, now seen corresponding path program 1 times [2022-07-23 05:37:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333331479] [2022-07-23 05:37:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:21,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:21,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:21,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 05:37:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:37:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:21,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:21,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333331479] [2022-07-23 05:37:21,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333331479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:21,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:21,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:37:21,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236191793] [2022-07-23 05:37:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:21,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:21,895 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:21,910 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2022-07-23 05:37:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:37:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:21,911 INFO L225 Difference]: With dead ends: 129 [2022-07-23 05:37:21,911 INFO L226 Difference]: Without dead ends: 129 [2022-07-23 05:37:21,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:21,912 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:21,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 108 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-07-23 05:37:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-23 05:37:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2022-07-23 05:37:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 85 states have (on average 1.4) internal successors, (119), 94 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2022-07-23 05:37:21,914 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 13 [2022-07-23 05:37:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:21,915 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2022-07-23 05:37:21,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2022-07-23 05:37:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:37:21,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:21,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:21,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-23 05:37:22,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:22,122 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 447033770, now seen corresponding path program 1 times [2022-07-23 05:37:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:22,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744038935] [2022-07-23 05:37:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:22,123 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:22,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 05:37:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:37:22,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:22,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:22,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:22,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:23,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:23,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744038935] [2022-07-23 05:37:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744038935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:23,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:23,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-23 05:37:23,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394618405] [2022-07-23 05:37:23,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:37:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:37:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:37:23,333 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:24,227 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2022-07-23 05:37:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:37:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:37:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:24,229 INFO L225 Difference]: With dead ends: 170 [2022-07-23 05:37:24,229 INFO L226 Difference]: Without dead ends: 170 [2022-07-23 05:37:24,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:37:24,229 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 288 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:24,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 168 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:37:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-23 05:37:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 83. [2022-07-23 05:37:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 82 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2022-07-23 05:37:24,231 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 14 [2022-07-23 05:37:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:24,231 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2022-07-23 05:37:24,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2022-07-23 05:37:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:37:24,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:24,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:24,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:24,438 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2022-07-23 05:37:24,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:24,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812892537] [2022-07-23 05:37:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:24,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:24,440 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:24,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 05:37:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:37:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:24,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:24,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:24,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:25,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:25,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:25,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812892537] [2022-07-23 05:37:25,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812892537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:25,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:25,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-23 05:37:25,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498233652] [2022-07-23 05:37:25,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:25,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:37:25,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:37:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:37:25,334 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:26,239 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-07-23 05:37:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:37:26,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:37:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:26,241 INFO L225 Difference]: With dead ends: 185 [2022-07-23 05:37:26,241 INFO L226 Difference]: Without dead ends: 185 [2022-07-23 05:37:26,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:37:26,241 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 552 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:26,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 208 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:37:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-23 05:37:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 127. [2022-07-23 05:37:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.3949579831932772) internal successors, (166), 126 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-07-23 05:37:26,244 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 15 [2022-07-23 05:37:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:26,244 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-07-23 05:37:26,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-07-23 05:37:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:37:26,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:26,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:26,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:26,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:26,452 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1519675195, now seen corresponding path program 1 times [2022-07-23 05:37:26,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:26,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937123727] [2022-07-23 05:37:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:26,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:26,453 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:26,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 05:37:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 05:37:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:26,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:26,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:26,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:26,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:26,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937123727] [2022-07-23 05:37:26,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937123727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:26,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:26,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-23 05:37:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326895001] [2022-07-23 05:37:26,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:26,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:37:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:37:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:37:26,984 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:27,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:27,115 INFO L93 Difference]: Finished difference Result 160 states and 209 transitions. [2022-07-23 05:37:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:37:27,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:37:27,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:27,116 INFO L225 Difference]: With dead ends: 160 [2022-07-23 05:37:27,117 INFO L226 Difference]: Without dead ends: 160 [2022-07-23 05:37:27,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:37:27,118 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:27,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 279 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-23 05:37:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-23 05:37:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2022-07-23 05:37:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.380952380952381) internal successors, (174), 133 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2022-07-23 05:37:27,122 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 15 [2022-07-23 05:37:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:27,122 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2022-07-23 05:37:27,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2022-07-23 05:37:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:37:27,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:27,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:27,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:27,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:27,330 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1777840633, now seen corresponding path program 1 times [2022-07-23 05:37:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059463944] [2022-07-23 05:37:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:27,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:27,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:27,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 05:37:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:27,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 05:37:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:27,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:27,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:27,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:28,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:28,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:28,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059463944] [2022-07-23 05:37:28,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059463944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:28,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:28,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-23 05:37:28,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594752891] [2022-07-23 05:37:28,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:28,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:37:28,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:37:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:37:28,226 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:28,940 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2022-07-23 05:37:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:37:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:37:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:28,941 INFO L225 Difference]: With dead ends: 168 [2022-07-23 05:37:28,941 INFO L226 Difference]: Without dead ends: 168 [2022-07-23 05:37:28,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:37:28,951 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 97 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:28,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 314 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-07-23 05:37:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-23 05:37:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2022-07-23 05:37:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.380952380952381) internal successors, (174), 133 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2022-07-23 05:37:28,954 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 15 [2022-07-23 05:37:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:28,954 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2022-07-23 05:37:28,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2022-07-23 05:37:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:37:28,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:28,955 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:28,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:29,162 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash 151290486, now seen corresponding path program 1 times [2022-07-23 05:37:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:29,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501849389] [2022-07-23 05:37:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:29,163 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:29,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 05:37:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:37:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:29,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:29,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:29,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:29,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:30,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:30,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:30,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501849389] [2022-07-23 05:37:30,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501849389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:30,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:30,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-23 05:37:30,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390201498] [2022-07-23 05:37:30,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:30,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:37:30,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:37:30,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:37:30,367 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:31,032 INFO L93 Difference]: Finished difference Result 182 states and 236 transitions. [2022-07-23 05:37:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:37:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-23 05:37:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:31,034 INFO L225 Difference]: With dead ends: 182 [2022-07-23 05:37:31,034 INFO L226 Difference]: Without dead ends: 182 [2022-07-23 05:37:31,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:37:31,035 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:31,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 275 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 37 Unchecked, 0.6s Time] [2022-07-23 05:37:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-23 05:37:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2022-07-23 05:37:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 134 states have (on average 1.373134328358209) internal successors, (184), 141 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 184 transitions. [2022-07-23 05:37:31,038 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 184 transitions. Word has length 16 [2022-07-23 05:37:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:31,038 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 184 transitions. [2022-07-23 05:37:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 184 transitions. [2022-07-23 05:37:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:37:31,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:31,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:31,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:31,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:31,239 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2022-07-23 05:37:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:31,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528932072] [2022-07-23 05:37:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:31,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:31,240 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:31,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 05:37:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:37:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:31,325 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:37:31,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-23 05:37:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:31,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:31,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:31,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528932072] [2022-07-23 05:37:31,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528932072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:31,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:31,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:37:31,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556366466] [2022-07-23 05:37:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:31,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:37:31,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:37:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:37:31,346 INFO L87 Difference]: Start difference. First operand 142 states and 184 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:31,418 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-07-23 05:37:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:37:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:37:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:31,419 INFO L225 Difference]: With dead ends: 143 [2022-07-23 05:37:31,419 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 05:37:31,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:37:31,419 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 05:37:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-07-23 05:37:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 140 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2022-07-23 05:37:31,422 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 17 [2022-07-23 05:37:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:31,422 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2022-07-23 05:37:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2022-07-23 05:37:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:37:31,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:31,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:31,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:31,629 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2022-07-23 05:37:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964184949] [2022-07-23 05:37:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:31,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:31,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:31,631 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:31,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 05:37:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:37:31,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:31,698 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:31,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:31,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:31,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964184949] [2022-07-23 05:37:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964184949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:31,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:31,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:31,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242636377] [2022-07-23 05:37:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:31,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:37:31,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:37:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:37:31,749 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:31,941 INFO L93 Difference]: Finished difference Result 214 states and 269 transitions. [2022-07-23 05:37:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:37:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:37:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:31,943 INFO L225 Difference]: With dead ends: 214 [2022-07-23 05:37:31,943 INFO L226 Difference]: Without dead ends: 214 [2022-07-23 05:37:31,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:37:31,943 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:31,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 161 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:37:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-23 05:37:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 173. [2022-07-23 05:37:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 166 states have (on average 1.3433734939759037) internal successors, (223), 172 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 223 transitions. [2022-07-23 05:37:31,946 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 223 transitions. Word has length 17 [2022-07-23 05:37:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:31,946 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 223 transitions. [2022-07-23 05:37:31,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 223 transitions. [2022-07-23 05:37:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:37:31,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:31,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:31,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:32,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:32,153 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2022-07-23 05:37:32,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:32,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242541749] [2022-07-23 05:37:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:32,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:32,155 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:32,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 05:37:32,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:32,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:32,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:37:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:32,260 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:32,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:32,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:32,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:37:32,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:37:32,398 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:32,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-07-23 05:37:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:32,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:33,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:33,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:37:33,297 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:33,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:37:33,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-23 05:37:33,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:33,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:33,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242541749] [2022-07-23 05:37:33,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242541749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:33,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:33,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-23 05:37:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032626369] [2022-07-23 05:37:33,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:37:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:37:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=359, Unknown=1, NotChecked=0, Total=420 [2022-07-23 05:37:33,632 INFO L87 Difference]: Start difference. First operand 173 states and 223 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:37,476 INFO L93 Difference]: Finished difference Result 420 states and 510 transitions. [2022-07-23 05:37:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 05:37:37,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:37:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:37,477 INFO L225 Difference]: With dead ends: 420 [2022-07-23 05:37:37,477 INFO L226 Difference]: Without dead ends: 420 [2022-07-23 05:37:37,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=554, Invalid=1607, Unknown=1, NotChecked=0, Total=2162 [2022-07-23 05:37:37,478 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 640 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:37,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 489 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 354 Invalid, 0 Unknown, 43 Unchecked, 0.9s Time] [2022-07-23 05:37:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-07-23 05:37:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 181. [2022-07-23 05:37:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.3505747126436782) internal successors, (235), 180 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 235 transitions. [2022-07-23 05:37:37,482 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 235 transitions. Word has length 17 [2022-07-23 05:37:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:37,483 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 235 transitions. [2022-07-23 05:37:37,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 235 transitions. [2022-07-23 05:37:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:37:37,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:37,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:37,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-23 05:37:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:37,690 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash 118982356, now seen corresponding path program 2 times [2022-07-23 05:37:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:37,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951089357] [2022-07-23 05:37:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:37,692 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:37,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 05:37:37,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:37,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:37,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:37:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:37,823 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:37,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:37,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:37,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-23 05:37:37,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-23 05:37:38,112 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:38,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-07-23 05:37:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:38,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:39,172 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:39,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:37:39,193 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:39,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:37:39,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-23 05:37:39,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:39,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:39,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:39,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951089357] [2022-07-23 05:37:39,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951089357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:39,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:39,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-23 05:37:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319955759] [2022-07-23 05:37:39,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 05:37:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 05:37:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=394, Unknown=1, NotChecked=0, Total=462 [2022-07-23 05:37:39,649 INFO L87 Difference]: Start difference. First operand 181 states and 235 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:40,924 INFO L93 Difference]: Finished difference Result 197 states and 251 transitions. [2022-07-23 05:37:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 05:37:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:37:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:40,926 INFO L225 Difference]: With dead ends: 197 [2022-07-23 05:37:40,926 INFO L226 Difference]: Without dead ends: 197 [2022-07-23 05:37:40,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=122, Invalid=633, Unknown=1, NotChecked=0, Total=756 [2022-07-23 05:37:40,927 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:40,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 434 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-07-23 05:37:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-23 05:37:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 178. [2022-07-23 05:37:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 171 states have (on average 1.3625730994152048) internal successors, (233), 177 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 233 transitions. [2022-07-23 05:37:40,930 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 233 transitions. Word has length 17 [2022-07-23 05:37:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:40,930 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 233 transitions. [2022-07-23 05:37:40,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 233 transitions. [2022-07-23 05:37:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:37:40,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:40,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:40,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:41,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:41,138 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash -305374680, now seen corresponding path program 1 times [2022-07-23 05:37:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:41,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033358029] [2022-07-23 05:37:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:41,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:41,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:41,140 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:41,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 05:37:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:37:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:41,217 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:41,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:41,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:41,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:41,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033358029] [2022-07-23 05:37:41,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033358029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:41,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:41,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:37:41,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238404091] [2022-07-23 05:37:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:41,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:37:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:37:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:37:41,265 INFO L87 Difference]: Start difference. First operand 178 states and 233 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:41,412 INFO L93 Difference]: Finished difference Result 201 states and 261 transitions. [2022-07-23 05:37:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:37:41,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:37:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:41,413 INFO L225 Difference]: With dead ends: 201 [2022-07-23 05:37:41,413 INFO L226 Difference]: Without dead ends: 201 [2022-07-23 05:37:41,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:37:41,414 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:41,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 84 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:37:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-23 05:37:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 159. [2022-07-23 05:37:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 152 states have (on average 1.355263157894737) internal successors, (206), 158 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2022-07-23 05:37:41,416 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 17 [2022-07-23 05:37:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:41,417 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2022-07-23 05:37:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2022-07-23 05:37:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:37:41,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:41,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:41,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-23 05:37:41,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:41,624 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash -892134894, now seen corresponding path program 2 times [2022-07-23 05:37:41,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:41,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214928322] [2022-07-23 05:37:41,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:41,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:41,626 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:41,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 05:37:41,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:37:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:41,752 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:41,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:41,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:41,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-23 05:37:42,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-23 05:37:42,186 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:42,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-07-23 05:37:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:42,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:43,548 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:43,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-23 05:37:43,561 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:43,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-07-23 05:37:43,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-23 05:37:44,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:44,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:44,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:44,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214928322] [2022-07-23 05:37:44,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214928322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:44,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:44,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-23 05:37:44,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438077942] [2022-07-23 05:37:44,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:44,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:37:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:37:44,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=551, Unknown=1, NotChecked=0, Total=650 [2022-07-23 05:37:44,435 INFO L87 Difference]: Start difference. First operand 159 states and 206 transitions. Second operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:47,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 05:37:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:51,073 INFO L93 Difference]: Finished difference Result 235 states and 295 transitions. [2022-07-23 05:37:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 05:37:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:37:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:51,078 INFO L225 Difference]: With dead ends: 235 [2022-07-23 05:37:51,078 INFO L226 Difference]: Without dead ends: 235 [2022-07-23 05:37:51,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=322, Invalid=1657, Unknown=1, NotChecked=0, Total=1980 [2022-07-23 05:37:51,079 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 222 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:51,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 322 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 307 Invalid, 1 Unknown, 160 Unchecked, 3.1s Time] [2022-07-23 05:37:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-23 05:37:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 151. [2022-07-23 05:37:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 144 states have (on average 1.375) internal successors, (198), 150 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-07-23 05:37:51,082 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 17 [2022-07-23 05:37:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:51,082 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-07-23 05:37:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-07-23 05:37:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:37:51,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:51,083 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:51,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:51,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:51,290 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-23 05:37:51,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:51,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644924039] [2022-07-23 05:37:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:51,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:51,291 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 05:37:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:37:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:51,353 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:51,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:51,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:51,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644924039] [2022-07-23 05:37:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644924039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:51,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:51,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-07-23 05:37:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820125826] [2022-07-23 05:37:51,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:51,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:37:51,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:37:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:37:51,866 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:52,561 INFO L93 Difference]: Finished difference Result 276 states and 360 transitions. [2022-07-23 05:37:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:37:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-23 05:37:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:52,563 INFO L225 Difference]: With dead ends: 276 [2022-07-23 05:37:52,563 INFO L226 Difference]: Without dead ends: 276 [2022-07-23 05:37:52,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:37:52,564 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 362 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:52,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 160 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:37:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-23 05:37:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 146. [2022-07-23 05:37:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.3571428571428572) internal successors, (190), 145 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2022-07-23 05:37:52,566 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 18 [2022-07-23 05:37:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:52,567 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2022-07-23 05:37:52,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2022-07-23 05:37:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:37:52,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:52,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:52,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:52,774 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1622072275, now seen corresponding path program 3 times [2022-07-23 05:37:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021232458] [2022-07-23 05:37:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:37:52,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:52,776 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:52,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-23 05:37:52,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:37:52,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 05:37:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:52,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:52,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:53,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2022-07-23 05:37:53,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:37:53,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:37:53,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:53,272 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:53,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-07-23 05:37:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:37:53,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:53,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021232458] [2022-07-23 05:37:53,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021232458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:53,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:53,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:37:53,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496358408] [2022-07-23 05:37:53,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:53,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:37:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:37:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:37:53,291 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:53,590 INFO L93 Difference]: Finished difference Result 169 states and 212 transitions. [2022-07-23 05:37:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:37:53,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-23 05:37:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:53,591 INFO L225 Difference]: With dead ends: 169 [2022-07-23 05:37:53,591 INFO L226 Difference]: Without dead ends: 169 [2022-07-23 05:37:53,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:37:53,592 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:53,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 176 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-23 05:37:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-23 05:37:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2022-07-23 05:37:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 159 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2022-07-23 05:37:53,594 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 19 [2022-07-23 05:37:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:53,594 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2022-07-23 05:37:53,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2022-07-23 05:37:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:37:53,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:53,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:53,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:53,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:53,795 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1651826667, now seen corresponding path program 3 times [2022-07-23 05:37:53,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:53,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555443189] [2022-07-23 05:37:53,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:37:53,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:53,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:53,797 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:53,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 05:37:53,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:37:53,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:37:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:53,924 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:53,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:37:53,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:54,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2022-07-23 05:37:54,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:37:54,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-23 05:37:54,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:54,301 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:54,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-07-23 05:37:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:37:54,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:37:54,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:54,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555443189] [2022-07-23 05:37:54,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555443189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:37:54,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:37:54,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:37:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105297149] [2022-07-23 05:37:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:37:54,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:37:54,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:37:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:37:54,321 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:54,650 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-07-23 05:37:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:37:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-23 05:37:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:54,651 INFO L225 Difference]: With dead ends: 174 [2022-07-23 05:37:54,651 INFO L226 Difference]: Without dead ends: 174 [2022-07-23 05:37:54,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:37:54,652 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:54,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 217 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-07-23 05:37:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-23 05:37:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2022-07-23 05:37:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 159 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2022-07-23 05:37:54,658 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 19 [2022-07-23 05:37:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:54,658 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2022-07-23 05:37:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2022-07-23 05:37:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:37:54,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:54,659 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:54,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:54,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:37:54,866 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash 359108793, now seen corresponding path program 2 times [2022-07-23 05:37:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:37:54,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077636304] [2022-07-23 05:37:54,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:54,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:37:54,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:37:54,868 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:37:54,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 05:37:54,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:37:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:54,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:54,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:37:54,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:37:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:55,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:56,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:56,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:37:56,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077636304] [2022-07-23 05:37:56,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077636304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:56,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:37:56,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-23 05:37:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266266161] [2022-07-23 05:37:56,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:37:56,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:37:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:37:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:37:56,731 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:01,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:01,676 INFO L93 Difference]: Finished difference Result 608 states and 778 transitions. [2022-07-23 05:38:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:38:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-23 05:38:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:01,683 INFO L225 Difference]: With dead ends: 608 [2022-07-23 05:38:01,684 INFO L226 Difference]: Without dead ends: 608 [2022-07-23 05:38:01,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:38:01,684 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 742 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:01,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 502 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 401 Invalid, 0 Unknown, 66 Unchecked, 2.3s Time] [2022-07-23 05:38:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-07-23 05:38:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 216. [2022-07-23 05:38:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.3047619047619048) internal successors, (274), 215 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 274 transitions. [2022-07-23 05:38:01,691 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 274 transitions. Word has length 20 [2022-07-23 05:38:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:01,691 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 274 transitions. [2022-07-23 05:38:01,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 274 transitions. [2022-07-23 05:38:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:38:01,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:01,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:01,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:01,899 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1184909859, now seen corresponding path program 1 times [2022-07-23 05:38:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:01,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259699777] [2022-07-23 05:38:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:01,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:01,901 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:01,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-23 05:38:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:38:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:38:01,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:38:01,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:01,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259699777] [2022-07-23 05:38:01,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259699777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:38:01,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:38:01,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:38:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305832910] [2022-07-23 05:38:01,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:38:01,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:38:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:38:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:38:01,999 INFO L87 Difference]: Start difference. First operand 216 states and 274 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:02,047 INFO L93 Difference]: Finished difference Result 220 states and 273 transitions. [2022-07-23 05:38:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:38:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-23 05:38:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:02,048 INFO L225 Difference]: With dead ends: 220 [2022-07-23 05:38:02,048 INFO L226 Difference]: Without dead ends: 220 [2022-07-23 05:38:02,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:38:02,049 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:02,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:38:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-23 05:38:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 210. [2022-07-23 05:38:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.2843137254901962) internal successors, (262), 209 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 262 transitions. [2022-07-23 05:38:02,051 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 262 transitions. Word has length 21 [2022-07-23 05:38:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:02,052 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 262 transitions. [2022-07-23 05:38:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 262 transitions. [2022-07-23 05:38:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:38:02,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:02,052 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:02,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:02,259 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2022-07-23 05:38:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400675016] [2022-07-23 05:38:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:02,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:02,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:02,261 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:02,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-23 05:38:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 05:38:02,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:02,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:38:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:02,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:02,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400675016] [2022-07-23 05:38:02,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400675016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:02,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:38:02,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-23 05:38:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898640358] [2022-07-23 05:38:02,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:02,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:38:02,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:38:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:38:02,384 INFO L87 Difference]: Start difference. First operand 210 states and 262 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:02,453 INFO L93 Difference]: Finished difference Result 240 states and 290 transitions. [2022-07-23 05:38:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:38:02,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:38:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:02,455 INFO L225 Difference]: With dead ends: 240 [2022-07-23 05:38:02,455 INFO L226 Difference]: Without dead ends: 240 [2022-07-23 05:38:02,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:38:02,455 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 58 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:02,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 210 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:38:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-23 05:38:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2022-07-23 05:38:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.2697674418604652) internal successors, (273), 220 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 273 transitions. [2022-07-23 05:38:02,458 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 273 transitions. Word has length 23 [2022-07-23 05:38:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:02,458 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 273 transitions. [2022-07-23 05:38:02,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 273 transitions. [2022-07-23 05:38:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:38:02,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:02,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:02,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:02,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:02,660 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash 445238026, now seen corresponding path program 1 times [2022-07-23 05:38:02,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:02,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124724304] [2022-07-23 05:38:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:02,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:02,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:02,662 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:02,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-23 05:38:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 05:38:02,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:02,761 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:38:02,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:38:02,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:38:03,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-23 05:38:03,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-23 05:38:03,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:03,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-07-23 05:38:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:38:04,990 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:04,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-23 05:38:05,036 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:05,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-23 05:38:05,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:38:06,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:06,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:38:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:06,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:06,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124724304] [2022-07-23 05:38:06,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124724304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:06,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:38:06,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-23 05:38:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042955310] [2022-07-23 05:38:06,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:38:06,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:06,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:38:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2022-07-23 05:38:06,578 INFO L87 Difference]: Start difference. First operand 221 states and 273 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:07,980 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2022-07-23 05:38:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:38:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:38:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:07,982 INFO L225 Difference]: With dead ends: 276 [2022-07-23 05:38:07,982 INFO L226 Difference]: Without dead ends: 276 [2022-07-23 05:38:07,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=126, Invalid=685, Unknown=1, NotChecked=0, Total=812 [2022-07-23 05:38:07,983 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 248 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:07,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 436 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 69 Unchecked, 0.7s Time] [2022-07-23 05:38:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-23 05:38:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 223. [2022-07-23 05:38:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.271889400921659) internal successors, (276), 222 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 276 transitions. [2022-07-23 05:38:07,986 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 276 transitions. Word has length 23 [2022-07-23 05:38:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:07,986 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 276 transitions. [2022-07-23 05:38:07,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 276 transitions. [2022-07-23 05:38:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:38:07,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:07,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:07,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-23 05:38:08,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:08,195 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:08,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2022-07-23 05:38:08,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768526749] [2022-07-23 05:38:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:08,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:08,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:08,197 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:08,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-23 05:38:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:38:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:08,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-23 05:38:08,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 05:38:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:08,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:38:08,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768526749] [2022-07-23 05:38:08,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768526749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:38:08,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:38:08,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:38:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534888340] [2022-07-23 05:38:08,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:38:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:38:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:38:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:38:08,337 INFO L87 Difference]: Start difference. First operand 223 states and 276 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:08,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:08,493 INFO L93 Difference]: Finished difference Result 288 states and 349 transitions. [2022-07-23 05:38:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:38:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:38:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:08,495 INFO L225 Difference]: With dead ends: 288 [2022-07-23 05:38:08,495 INFO L226 Difference]: Without dead ends: 288 [2022-07-23 05:38:08,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:38:08,495 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:08,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 260 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:38:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-23 05:38:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 214. [2022-07-23 05:38:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.2644230769230769) internal successors, (263), 213 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 263 transitions. [2022-07-23 05:38:08,498 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 263 transitions. Word has length 23 [2022-07-23 05:38:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:08,498 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 263 transitions. [2022-07-23 05:38:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 263 transitions. [2022-07-23 05:38:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 05:38:08,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:08,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:08,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:08,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:08,706 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2022-07-23 05:38:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:08,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811037542] [2022-07-23 05:38:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:08,708 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:08,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-23 05:38:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 05:38:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:08,795 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:38:08,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:38:08,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-23 05:38:08,927 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:08,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-23 05:38:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:09,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:38:09,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-23 05:38:09,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-07-23 05:38:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:09,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811037542] [2022-07-23 05:38:09,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811037542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:09,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:38:09,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-23 05:38:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878445433] [2022-07-23 05:38:09,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:38:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:38:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:38:09,802 INFO L87 Difference]: Start difference. First operand 214 states and 263 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:11,210 INFO L93 Difference]: Finished difference Result 234 states and 286 transitions. [2022-07-23 05:38:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:38:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-23 05:38:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:11,211 INFO L225 Difference]: With dead ends: 234 [2022-07-23 05:38:11,211 INFO L226 Difference]: Without dead ends: 234 [2022-07-23 05:38:11,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:38:11,215 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:11,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 291 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:38:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-23 05:38:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 219. [2022-07-23 05:38:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.267605633802817) internal successors, (270), 218 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 270 transitions. [2022-07-23 05:38:11,218 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 270 transitions. Word has length 23 [2022-07-23 05:38:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:11,218 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 270 transitions. [2022-07-23 05:38:11,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 270 transitions. [2022-07-23 05:38:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:38:11,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:11,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:11,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:11,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:11,423 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:11,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2055315217, now seen corresponding path program 1 times [2022-07-23 05:38:11,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:11,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724460628] [2022-07-23 05:38:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:11,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:11,425 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:11,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-23 05:38:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:38:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:11,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 05:38:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:12,356 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:12,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-07-23 05:38:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:12,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:38:12,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:12,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724460628] [2022-07-23 05:38:12,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724460628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:38:12,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:38:12,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-23 05:38:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100309272] [2022-07-23 05:38:12,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:38:12,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:38:12,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:38:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:38:12,581 INFO L87 Difference]: Start difference. First operand 219 states and 270 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:13,025 INFO L93 Difference]: Finished difference Result 237 states and 288 transitions. [2022-07-23 05:38:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:38:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-23 05:38:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:13,027 INFO L225 Difference]: With dead ends: 237 [2022-07-23 05:38:13,027 INFO L226 Difference]: Without dead ends: 237 [2022-07-23 05:38:13,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:38:13,028 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:13,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 189 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-07-23 05:38:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-23 05:38:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2022-07-23 05:38:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.2864321608040201) internal successors, (256), 204 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 256 transitions. [2022-07-23 05:38:13,030 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 256 transitions. Word has length 24 [2022-07-23 05:38:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:13,031 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 256 transitions. [2022-07-23 05:38:13,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 256 transitions. [2022-07-23 05:38:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:38:13,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:13,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:13,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:13,238 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2045687839, now seen corresponding path program 1 times [2022-07-23 05:38:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:13,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999935195] [2022-07-23 05:38:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:13,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:13,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:13,240 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:13,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-23 05:38:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:13,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 05:38:13,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:38:13,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-23 05:38:13,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:38:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:13,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:38:14,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:14,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:14,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999935195] [2022-07-23 05:38:14,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999935195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:14,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:38:14,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-23 05:38:14,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143610146] [2022-07-23 05:38:14,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:14,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 05:38:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 05:38:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:38:14,972 INFO L87 Difference]: Start difference. First operand 205 states and 256 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:20,085 INFO L93 Difference]: Finished difference Result 534 states and 621 transitions. [2022-07-23 05:38:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 05:38:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:38:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:20,088 INFO L225 Difference]: With dead ends: 534 [2022-07-23 05:38:20,088 INFO L226 Difference]: Without dead ends: 528 [2022-07-23 05:38:20,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=514, Invalid=1648, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:38:20,088 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 846 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:20,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 710 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-23 05:38:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-23 05:38:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 257. [2022-07-23 05:38:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.2749003984063745) internal successors, (320), 256 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 320 transitions. [2022-07-23 05:38:20,092 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 320 transitions. Word has length 25 [2022-07-23 05:38:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:20,092 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 320 transitions. [2022-07-23 05:38:20,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 320 transitions. [2022-07-23 05:38:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:38:20,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:20,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:20,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:20,300 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2022-07-23 05:38:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:20,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655773555] [2022-07-23 05:38:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:20,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:20,302 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:20,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-23 05:38:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:38:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:22,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:38:22,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655773555] [2022-07-23 05:38:22,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655773555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:38:22,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:38:22,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:38:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019711769] [2022-07-23 05:38:22,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:38:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:38:22,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:38:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:38:22,494 INFO L87 Difference]: Start difference. First operand 257 states and 320 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:22,506 INFO L93 Difference]: Finished difference Result 271 states and 334 transitions. [2022-07-23 05:38:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:38:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:38:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:22,507 INFO L225 Difference]: With dead ends: 271 [2022-07-23 05:38:22,507 INFO L226 Difference]: Without dead ends: 268 [2022-07-23 05:38:22,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2022-07-23 05:38:22,508 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:22,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 92 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-23 05:38:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-23 05:38:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-07-23 05:38:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.264367816091954) internal successors, (330), 266 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2022-07-23 05:38:22,511 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 25 [2022-07-23 05:38:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:22,511 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2022-07-23 05:38:22,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2022-07-23 05:38:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:38:22,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:22,511 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:22,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-07-23 05:38:22,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:22,712 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1622986013, now seen corresponding path program 2 times [2022-07-23 05:38:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:22,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461708438] [2022-07-23 05:38:22,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:38:22,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:22,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:22,714 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:22,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-23 05:38:22,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:38:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:38:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-23 05:38:22,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:22,841 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:38:22,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:38:22,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:38:23,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-23 05:38:23,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-23 05:38:23,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:23,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2022-07-23 05:38:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:38:25,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:38:26,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:26,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-23 05:38:26,925 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:26,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-23 05:38:26,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:38:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:38:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:28,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:28,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461708438] [2022-07-23 05:38:28,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461708438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:28,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:38:28,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-07-23 05:38:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712264430] [2022-07-23 05:38:28,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:28,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 05:38:28,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:28,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 05:38:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=611, Unknown=1, NotChecked=0, Total=702 [2022-07-23 05:38:28,342 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:45,223 INFO L93 Difference]: Finished difference Result 523 states and 597 transitions. [2022-07-23 05:38:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-23 05:38:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-23 05:38:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:45,224 INFO L225 Difference]: With dead ends: 523 [2022-07-23 05:38:45,224 INFO L226 Difference]: Without dead ends: 523 [2022-07-23 05:38:45,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=609, Invalid=4220, Unknown=1, NotChecked=0, Total=4830 [2022-07-23 05:38:45,225 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 359 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:45,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1681 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 945 Invalid, 0 Unknown, 235 Unchecked, 4.3s Time] [2022-07-23 05:38:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-23 05:38:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 281. [2022-07-23 05:38:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 275 states have (on average 1.269090909090909) internal successors, (349), 280 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 349 transitions. [2022-07-23 05:38:45,229 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 349 transitions. Word has length 25 [2022-07-23 05:38:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:45,229 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 349 transitions. [2022-07-23 05:38:45,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 349 transitions. [2022-07-23 05:38:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 05:38:45,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:45,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:45,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-07-23 05:38:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:45,437 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash -71391224, now seen corresponding path program 1 times [2022-07-23 05:38:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:45,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64198053] [2022-07-23 05:38:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:45,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:45,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:45,439 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:45,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-23 05:38:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:38:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:45,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-23 05:38:45,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 05:38:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:45,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:38:45,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64198053] [2022-07-23 05:38:45,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64198053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:38:45,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:38:45,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:38:45,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214660076] [2022-07-23 05:38:45,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:38:45,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:38:45,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:38:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:38:45,599 INFO L87 Difference]: Start difference. First operand 281 states and 349 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:45,674 INFO L93 Difference]: Finished difference Result 284 states and 351 transitions. [2022-07-23 05:38:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:38:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-23 05:38:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:45,675 INFO L225 Difference]: With dead ends: 284 [2022-07-23 05:38:45,675 INFO L226 Difference]: Without dead ends: 269 [2022-07-23 05:38:45,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:38:45,675 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:45,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-07-23 05:38:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-23 05:38:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-07-23 05:38:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 263 states have (on average 1.2699619771863118) internal successors, (334), 268 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 334 transitions. [2022-07-23 05:38:45,678 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 334 transitions. Word has length 26 [2022-07-23 05:38:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:45,679 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 334 transitions. [2022-07-23 05:38:45,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 334 transitions. [2022-07-23 05:38:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:38:45,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:45,679 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:45,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-07-23 05:38:45,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:45,886 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -750442950, now seen corresponding path program 1 times [2022-07-23 05:38:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622124908] [2022-07-23 05:38:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:45,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:45,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:45,888 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:45,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-07-23 05:38:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:38:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:46,007 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:38:46,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:38:46,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-23 05:38:46,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-23 05:38:46,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-23 05:38:46,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:46,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-07-23 05:38:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-23 05:38:46,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:38:48,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:48,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-23 05:38:48,832 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:38:48,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-23 05:38:48,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:38:50,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:38:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:38:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:38:50,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:38:50,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622124908] [2022-07-23 05:38:50,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622124908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:50,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:38:50,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 28 [2022-07-23 05:38:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571358643] [2022-07-23 05:38:50,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:50,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-23 05:38:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:38:50,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-23 05:38:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=659, Unknown=1, NotChecked=0, Total=756 [2022-07-23 05:38:50,666 INFO L87 Difference]: Start difference. First operand 269 states and 334 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:53,240 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2022-07-23 05:38:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:38:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 05:38:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:53,243 INFO L225 Difference]: With dead ends: 264 [2022-07-23 05:38:53,243 INFO L226 Difference]: Without dead ends: 264 [2022-07-23 05:38:53,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=146, Invalid=909, Unknown=1, NotChecked=0, Total=1056 [2022-07-23 05:38:53,244 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:53,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 454 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 257 Invalid, 0 Unknown, 59 Unchecked, 1.4s Time] [2022-07-23 05:38:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-23 05:38:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 251. [2022-07-23 05:38:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2530612244897958) internal successors, (307), 250 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 307 transitions. [2022-07-23 05:38:53,246 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 307 transitions. Word has length 27 [2022-07-23 05:38:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:53,247 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 307 transitions. [2022-07-23 05:38:53,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 307 transitions. [2022-07-23 05:38:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:38:53,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:53,248 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:53,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-07-23 05:38:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:38:53,455 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:38:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash -284268204, now seen corresponding path program 1 times [2022-07-23 05:38:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:38:53,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963964668] [2022-07-23 05:38:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:53,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:38:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:38:53,457 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:38:53,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-23 05:38:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:38:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates...