./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcat-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/cstrcat-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 bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:34:35,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:34:35,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:34:35,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:34:35,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:34:35,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:34:35,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:34:35,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:34:35,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:34:35,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:34:35,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:34:35,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:34:35,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:34:35,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:34:35,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:34:35,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:34:35,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:34:35,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:34:35,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:34:35,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:34:35,149 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:34:35,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:34:35,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:34:35,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:34:35,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:34:35,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:34:35,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:34:35,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:34:35,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:34:35,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:34:35,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:34:35,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:34:35,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:34:35,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:34:35,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:34:35,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:34:35,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:34:35,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:34:35,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:34:35,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:34:35,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:34:35,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:34:35,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:34:35,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:34:35,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:34:35,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:34:35,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:34:35,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:34:35,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:34:35,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:34:35,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:34:35,185 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:34:35,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:34:35,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:34:35,186 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:34:35,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:34:35,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:34:35,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:34:35,186 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:34:35,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:34:35,187 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:34:35,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:34:35,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:34:35,187 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:34:35,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:34:35,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:34:35,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:34:35,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:34:35,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:34:35,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:34:35,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:34:35,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:34:35,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:34:35,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2022-07-23 05:34:35,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:34:35,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:34:35,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:34:35,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:34:35,391 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:34:35,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2022-07-23 05:34:35,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ecaf615/0a2d3924cbcb45858481656d02491be6/FLAG6344453a9 [2022-07-23 05:34:35,888 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:34:35,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2022-07-23 05:34:35,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ecaf615/0a2d3924cbcb45858481656d02491be6/FLAG6344453a9 [2022-07-23 05:34:35,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ecaf615/0a2d3924cbcb45858481656d02491be6 [2022-07-23 05:34:35,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:34:35,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:34:35,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:34:35,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:34:35,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:34:35,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:34:35" (1/1) ... [2022-07-23 05:34:35,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98bc91f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:35, skipping insertion in model container [2022-07-23 05:34:35,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:34:35" (1/1) ... [2022-07-23 05:34:35,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:34:35,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:34:36,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:34:36,155 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:34:36,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:34:36,198 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:34:36,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36 WrapperNode [2022-07-23 05:34:36,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:34:36,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:34:36,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:34:36,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:34:36,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,237 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-07-23 05:34:36,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:34:36,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:34:36,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:34:36,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:34:36,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:34:36,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:34:36,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:34:36,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:34:36,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (1/1) ... [2022-07-23 05:34:36,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:34:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:36,284 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 05:34:36,285 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 05:34:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:34:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:34:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:34:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:34:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:34:36,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:34:36,369 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:34:36,370 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:34:36,524 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:34:36,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:34:36,529 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 05:34:36,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:34:36 BoogieIcfgContainer [2022-07-23 05:34:36,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:34:36,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:34:36,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:34:36,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:34:36,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:34:35" (1/3) ... [2022-07-23 05:34:36,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c281a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:34:36, skipping insertion in model container [2022-07-23 05:34:36,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:34:36" (2/3) ... [2022-07-23 05:34:36,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c281a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:34:36, skipping insertion in model container [2022-07-23 05:34:36,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:34:36" (3/3) ... [2022-07-23 05:34:36,546 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2022-07-23 05:34:36,557 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:34:36,558 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-23 05:34:36,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:34:36,599 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@3fe6ef0b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@48175583 [2022-07-23 05:34:36,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-23 05:34:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:34:36,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:36,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:36,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2022-07-23 05:34:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:36,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126846975] [2022-07-23 05:34:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:36,766 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 05:34:36,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:36,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126846975] [2022-07-23 05:34:36,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126846975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:36,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:36,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130681168] [2022-07-23 05:34:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:36,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:36,803 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 05:34:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:36,929 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2022-07-23 05:34:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 05:34:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:36,937 INFO L225 Difference]: With dead ends: 124 [2022-07-23 05:34:36,937 INFO L226 Difference]: Without dead ends: 118 [2022-07-23 05:34:36,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:36,941 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:36,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-23 05:34:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2022-07-23 05:34:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-07-23 05:34:36,963 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2022-07-23 05:34:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:36,963 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-07-23 05:34:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 05:34:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-07-23 05:34:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:34:36,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:36,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:36,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:34:36,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2022-07-23 05:34:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:36,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309464799] [2022-07-23 05:34:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:36,983 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 05:34:36,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309464799] [2022-07-23 05:34:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309464799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:36,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:36,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:34:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705400020] [2022-07-23 05:34:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:36,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:34:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:34:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:36,987 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. 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 05:34:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,011 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-23 05:34:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:34:37,011 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 05:34:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,012 INFO L225 Difference]: With dead ends: 46 [2022-07-23 05:34:37,012 INFO L226 Difference]: Without dead ends: 45 [2022-07-23 05:34:37,013 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 05:34:37,014 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-23 05:34:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-07-23 05:34:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 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 05:34:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-23 05:34:37,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-07-23 05:34:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,017 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-23 05:34:37,017 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 05:34:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-23 05:34:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:37,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:34:37,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,018 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-23 05:34:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643420334] [2022-07-23 05:34:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,075 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 05:34:37,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643420334] [2022-07-23 05:34:37,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643420334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333992298] [2022-07-23 05:34:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:37,081 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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 05:34:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,107 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-07-23 05:34:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 05:34:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,109 INFO L225 Difference]: With dead ends: 76 [2022-07-23 05:34:37,110 INFO L226 Difference]: Without dead ends: 76 [2022-07-23 05:34:37,111 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 05:34:37,112 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-23 05:34:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2022-07-23 05:34:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-23 05:34:37,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2022-07-23 05:34:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,117 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-23 05:34:37,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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 05:34:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-23 05:34:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:37,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:34:37,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-23 05:34:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134680320] [2022-07-23 05:34:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,160 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 05:34:37,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134680320] [2022-07-23 05:34:37,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134680320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:37,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886166146] [2022-07-23 05:34:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:37,163 INFO L87 Difference]: Start difference. First operand 46 states and 54 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 05:34:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,206 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-07-23 05:34:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:37,207 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 05:34:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,208 INFO L225 Difference]: With dead ends: 82 [2022-07-23 05:34:37,208 INFO L226 Difference]: Without dead ends: 82 [2022-07-23 05:34:37,208 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 05:34:37,209 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 157 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-23 05:34:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2022-07-23 05:34:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-23 05:34:37,214 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2022-07-23 05:34:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,215 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-23 05:34:37,215 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 05:34:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-23 05:34:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:37,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:34:37,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2022-07-23 05:34:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918856279] [2022-07-23 05:34:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,270 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 05:34:37,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918856279] [2022-07-23 05:34:37,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918856279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:34:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048735407] [2022-07-23 05:34:37,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:34:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:34:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:37,273 INFO L87 Difference]: Start difference. First operand 46 states and 54 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 05:34:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,294 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-07-23 05:34:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:34:37,294 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 05:34:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,295 INFO L225 Difference]: With dead ends: 44 [2022-07-23 05:34:37,296 INFO L226 Difference]: Without dead ends: 44 [2022-07-23 05:34:37,296 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 05:34:37,298 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-23 05:34:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-23 05:34:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-07-23 05:34:37,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2022-07-23 05:34:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,307 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-07-23 05:34:37,308 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 05:34:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-07-23 05:34:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:34:37,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:34:37,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2022-07-23 05:34:37,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899189855] [2022-07-23 05:34:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,366 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 05:34:37,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899189855] [2022-07-23 05:34:37,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899189855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538355171] [2022-07-23 05:34:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:37,381 INFO L87 Difference]: Start difference. First operand 44 states and 52 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 05:34:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,455 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-07-23 05:34:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:37,456 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 05:34:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,456 INFO L225 Difference]: With dead ends: 77 [2022-07-23 05:34:37,456 INFO L226 Difference]: Without dead ends: 77 [2022-07-23 05:34:37,457 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 05:34:37,457 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-23 05:34:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2022-07-23 05:34:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-23 05:34:37,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2022-07-23 05:34:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,461 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-23 05:34:37,461 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 05:34:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-23 05:34:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:34:37,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:34:37,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2022-07-23 05:34:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517678929] [2022-07-23 05:34:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,500 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 05:34:37,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517678929] [2022-07-23 05:34:37,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517678929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:37,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182194219] [2022-07-23 05:34:37,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:37,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:37,502 INFO L87 Difference]: Start difference. First operand 46 states and 55 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 05:34:37,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,514 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-23 05:34:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:37,515 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 05:34:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,516 INFO L225 Difference]: With dead ends: 52 [2022-07-23 05:34:37,516 INFO L226 Difference]: Without dead ends: 52 [2022-07-23 05:34:37,516 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 05:34:37,516 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-23 05:34:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-23 05:34:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 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 05:34:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-23 05:34:37,519 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 10 [2022-07-23 05:34:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,520 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-23 05:34:37,520 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 05:34:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-23 05:34:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:34:37,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:34:37,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2022-07-23 05:34:37,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138923699] [2022-07-23 05:34:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,541 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 05:34:37,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138923699] [2022-07-23 05:34:37,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138923699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:34:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647985841] [2022-07-23 05:34:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:34:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:34:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:34:37,543 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 05:34:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,565 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-07-23 05:34:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:34:37,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 05:34:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,566 INFO L225 Difference]: With dead ends: 45 [2022-07-23 05:34:37,566 INFO L226 Difference]: Without dead ends: 45 [2022-07-23 05:34:37,566 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 05:34:37,567 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-23 05:34:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-23 05:34:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-07-23 05:34:37,569 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2022-07-23 05:34:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,570 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-07-23 05:34:37,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 05:34:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-07-23 05:34:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:34:37,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:34:37,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2022-07-23 05:34:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547866399] [2022-07-23 05:34:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,612 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 05:34:37,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547866399] [2022-07-23 05:34:37,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547866399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:37,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:37,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232301254] [2022-07-23 05:34:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:37,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:37,614 INFO L87 Difference]: Start difference. First operand 45 states and 54 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 05:34:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:37,654 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-07-23 05:34:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:37,655 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 05:34:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:37,655 INFO L225 Difference]: With dead ends: 48 [2022-07-23 05:34:37,655 INFO L226 Difference]: Without dead ends: 48 [2022-07-23 05:34:37,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 05:34:37,658 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:37,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-23 05:34:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-07-23 05:34:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-23 05:34:37,666 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2022-07-23 05:34:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-23 05:34:37,667 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 05:34:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-23 05:34:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:34:37,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:37,668 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:34:37,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2022-07-23 05:34:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:37,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064674413] [2022-07-23 05:34:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,728 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 05:34:37,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:37,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064674413] [2022-07-23 05:34:37,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064674413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:37,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613657711] [2022-07-23 05:34:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:37,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:37,735 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 05:34:37,738 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 05:34:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:37,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:34:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:37,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:37,883 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 05:34:37,888 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 05:34:37,946 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 05:34:37,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:38,115 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 05:34:38,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613657711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:38,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:38,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-23 05:34:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368636329] [2022-07-23 05:34:38,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:38,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:34:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:34:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:38,119 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 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 05:34:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:38,252 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2022-07-23 05:34:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:34:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 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 12 [2022-07-23 05:34:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:38,253 INFO L225 Difference]: With dead ends: 106 [2022-07-23 05:34:38,253 INFO L226 Difference]: Without dead ends: 106 [2022-07-23 05:34:38,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:34:38,254 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:38,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 168 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-23 05:34:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 43. [2022-07-23 05:34:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-23 05:34:38,263 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2022-07-23 05:34:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:38,263 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-23 05:34:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 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 05:34:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-23 05:34:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:34:38,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:38,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:38,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:34:38,479 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 05:34:38,480 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382830, now seen corresponding path program 1 times [2022-07-23 05:34:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:38,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900306814] [2022-07-23 05:34:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:38,568 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 05:34:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900306814] [2022-07-23 05:34:38,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900306814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:38,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:38,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:38,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388313082] [2022-07-23 05:34:38,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:38,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:34:38,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:38,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:34:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:38,574 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:38,652 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-07-23 05:34:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:34:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:38,657 INFO L225 Difference]: With dead ends: 74 [2022-07-23 05:34:38,657 INFO L226 Difference]: Without dead ends: 74 [2022-07-23 05:34:38,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:34:38,658 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:38,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 135 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-23 05:34:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2022-07-23 05:34:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 53 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 05:34:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-23 05:34:38,664 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 14 [2022-07-23 05:34:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:38,665 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-23 05:34:38,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-23 05:34:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:34:38,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:38,666 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:38,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:34:38,666 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2022-07-23 05:34:38,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932678770] [2022-07-23 05:34:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:38,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:38,711 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 05:34:38,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932678770] [2022-07-23 05:34:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932678770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:38,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996801695] [2022-07-23 05:34:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:38,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:38,714 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 05:34:38,715 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 05:34:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:34:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:38,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:34:38,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996801695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:38,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:34:38,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-23 05:34:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862393738] [2022-07-23 05:34:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:38,801 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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 05:34:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:38,815 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2022-07-23 05:34:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 05:34:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:38,816 INFO L225 Difference]: With dead ends: 91 [2022-07-23 05:34:38,816 INFO L226 Difference]: Without dead ends: 91 [2022-07-23 05:34:38,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:38,817 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 51 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:38,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 109 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-23 05:34:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2022-07-23 05:34:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-07-23 05:34:38,820 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 14 [2022-07-23 05:34:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:38,821 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-07-23 05:34:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) 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 05:34:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-07-23 05:34:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:34:38,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:38,821 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:38,841 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 05:34:39,035 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,SelfDestructingSolverStorable11 [2022-07-23 05:34:39,036 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2022-07-23 05:34:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021039399] [2022-07-23 05:34:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,103 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 05:34:39,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021039399] [2022-07-23 05:34:39,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021039399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:39,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910923112] [2022-07-23 05:34:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:39,105 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 05:34:39,106 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 05:34:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:34:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:39,176 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:39,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 05:34:39,228 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 05:34:39,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:39,318 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 05:34:39,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910923112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:39,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:39,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-23 05:34:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474933912] [2022-07-23 05:34:39,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:34:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:34:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:34:39,320 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:39,412 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2022-07-23 05:34:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:34:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 05:34:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:39,413 INFO L225 Difference]: With dead ends: 96 [2022-07-23 05:34:39,413 INFO L226 Difference]: Without dead ends: 96 [2022-07-23 05:34:39,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:34:39,414 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:39,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-23 05:34:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2022-07-23 05:34:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-23 05:34:39,417 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 14 [2022-07-23 05:34:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:39,417 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-23 05:34:39,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-23 05:34:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:34:39,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:39,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:39,437 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 05:34:39,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:39,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1460548268, now seen corresponding path program 1 times [2022-07-23 05:34:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619229837] [2022-07-23 05:34:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,662 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 05:34:39,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619229837] [2022-07-23 05:34:39,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619229837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:39,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:39,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:39,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628155333] [2022-07-23 05:34:39,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:39,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:39,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:39,664 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 05:34:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:39,685 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-07-23 05:34:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 05:34:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:39,686 INFO L225 Difference]: With dead ends: 65 [2022-07-23 05:34:39,686 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 05:34:39,686 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 05:34:39,687 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:39,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 05:34:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-07-23 05:34:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 48 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 05:34:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-07-23 05:34:39,689 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2022-07-23 05:34:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:39,689 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-07-23 05:34:39,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 05:34:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-07-23 05:34:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:34:39,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:39,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-23 05:34:39,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2022-07-23 05:34:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216118616] [2022-07-23 05:34:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,737 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 05:34:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216118616] [2022-07-23 05:34:39,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216118616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:39,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:39,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589200400] [2022-07-23 05:34:39,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:39,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:39,740 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:39,772 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2022-07-23 05:34:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:34:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:39,773 INFO L225 Difference]: With dead ends: 89 [2022-07-23 05:34:39,773 INFO L226 Difference]: Without dead ends: 89 [2022-07-23 05:34:39,773 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 05:34:39,774 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:39,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-23 05:34:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2022-07-23 05:34:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 71 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 05:34:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-07-23 05:34:39,776 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 15 [2022-07-23 05:34:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:39,776 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-07-23 05:34:39,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-07-23 05:34:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:34:39,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:39,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:39,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-23 05:34:39,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2022-07-23 05:34:39,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676623509] [2022-07-23 05:34:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,802 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 05:34:39,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676623509] [2022-07-23 05:34:39,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676623509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:39,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:39,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880537918] [2022-07-23 05:34:39,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:39,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:39,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:39,805 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:39,816 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2022-07-23 05:34:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:34:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:39,817 INFO L225 Difference]: With dead ends: 71 [2022-07-23 05:34:39,817 INFO L226 Difference]: Without dead ends: 71 [2022-07-23 05:34:39,818 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 05:34:39,818 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:39,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-23 05:34:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2022-07-23 05:34:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-23 05:34:39,820 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 15 [2022-07-23 05:34:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:39,820 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-23 05:34:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-23 05:34:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:34:39,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:39,821 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 05:34:39,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-23 05:34:39,821 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,822 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2022-07-23 05:34:39,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089118604] [2022-07-23 05:34:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089118604] [2022-07-23 05:34:39,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089118604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:39,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:39,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:39,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924139277] [2022-07-23 05:34:39,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:39,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:39,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:39,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:39,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:39,843 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 05:34:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:39,861 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-07-23 05:34:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 05:34:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:39,862 INFO L225 Difference]: With dead ends: 47 [2022-07-23 05:34:39,862 INFO L226 Difference]: Without dead ends: 47 [2022-07-23 05:34:39,863 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 05:34:39,863 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:39,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-23 05:34:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-23 05:34:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 46 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 05:34:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-23 05:34:39,865 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2022-07-23 05:34:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:39,865 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-23 05:34:39,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 05:34:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-23 05:34:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:34:39,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:39,866 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 05:34:39,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-23 05:34:39,866 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2022-07-23 05:34:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536758232] [2022-07-23 05:34:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,907 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 05:34:39,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536758232] [2022-07-23 05:34:39,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536758232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:39,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:39,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:39,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545443543] [2022-07-23 05:34:39,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:39,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:34:39,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:34:39,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:39,909 INFO L87 Difference]: Start difference. First operand 47 states and 56 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 05:34:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:39,934 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-07-23 05:34:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:39,935 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 05:34:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:39,935 INFO L225 Difference]: With dead ends: 50 [2022-07-23 05:34:39,935 INFO L226 Difference]: Without dead ends: 50 [2022-07-23 05:34:39,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:39,936 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:39,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-23 05:34:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-23 05:34:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-23 05:34:39,938 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 17 [2022-07-23 05:34:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:39,938 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-23 05:34:39,938 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 05:34:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-23 05:34:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:34:39,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:39,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:39,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-23 05:34:39,939 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2022-07-23 05:34:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519108117] [2022-07-23 05:34:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:39,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:39,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519108117] [2022-07-23 05:34:39,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519108117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:39,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357757497] [2022-07-23 05:34:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:39,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:39,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:39,991 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 05:34:39,992 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 05:34:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:34:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:40,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-23 05:34:40,129 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 05:34:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:40,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:34:40,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357757497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:40,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:34:40,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-07-23 05:34:40,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821354980] [2022-07-23 05:34:40,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:40,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:34:40,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:34:40,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:34:40,142 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:40,211 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-07-23 05:34:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:34:40,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-23 05:34:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:40,213 INFO L225 Difference]: With dead ends: 93 [2022-07-23 05:34:40,213 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 05:34:40,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:34:40,214 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:40,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 186 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 05:34:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2022-07-23 05:34:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.25) internal successors, (85), 73 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 05:34:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-23 05:34:40,217 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 19 [2022-07-23 05:34:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:40,217 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-23 05:34:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-23 05:34:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:34:40,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:40,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:40,247 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 05:34:40,419 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 05:34:40,419 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1814130006, now seen corresponding path program 1 times [2022-07-23 05:34:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252158025] [2022-07-23 05:34:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:40,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252158025] [2022-07-23 05:34:40,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252158025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:40,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969198201] [2022-07-23 05:34:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:40,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:40,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:40,500 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 05:34:40,501 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 05:34:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:34:40,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:40,583 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:40,583 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 05:34:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:40,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969198201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:40,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:40,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-23 05:34:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821274472] [2022-07-23 05:34:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:34:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:34:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:34:40,709 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:40,774 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2022-07-23 05:34:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:34:40,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 05:34:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:40,775 INFO L225 Difference]: With dead ends: 91 [2022-07-23 05:34:40,775 INFO L226 Difference]: Without dead ends: 91 [2022-07-23 05:34:40,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:34:40,776 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:40,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 117 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-23 05:34:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2022-07-23 05:34:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-07-23 05:34:40,778 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 19 [2022-07-23 05:34:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:40,778 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-07-23 05:34:40,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-07-23 05:34:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:34:40,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:40,779 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] [2022-07-23 05:34:40,801 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 05:34:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:40,996 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2022-07-23 05:34:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278292581] [2022-07-23 05:34:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,019 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 05:34:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278292581] [2022-07-23 05:34:41,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278292581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:41,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:41,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:34:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294098541] [2022-07-23 05:34:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:34:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:34:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:34:41,021 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:41,048 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-07-23 05:34:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:34:41,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 05:34:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:41,050 INFO L225 Difference]: With dead ends: 75 [2022-07-23 05:34:41,050 INFO L226 Difference]: Without dead ends: 75 [2022-07-23 05:34:41,050 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 05:34:41,050 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:41,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-23 05:34:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-23 05:34:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-07-23 05:34:41,053 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 20 [2022-07-23 05:34:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:41,053 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-07-23 05:34:41,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-07-23 05:34:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:34:41,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:41,054 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] [2022-07-23 05:34:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-23 05:34:41,054 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2022-07-23 05:34:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:41,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060809887] [2022-07-23 05:34:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,096 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 05:34:41,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:41,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060809887] [2022-07-23 05:34:41,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060809887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:41,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:41,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:34:41,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872776153] [2022-07-23 05:34:41,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:34:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:34:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:34:41,098 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:41,151 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-23 05:34:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:34:41,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 05:34:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:41,153 INFO L225 Difference]: With dead ends: 81 [2022-07-23 05:34:41,153 INFO L226 Difference]: Without dead ends: 81 [2022-07-23 05:34:41,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:34:41,154 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:41,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 77 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-23 05:34:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-07-23 05:34:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 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 05:34:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-07-23 05:34:41,156 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2022-07-23 05:34:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:41,156 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-07-23 05:34:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-07-23 05:34:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:34:41,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:41,157 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] [2022-07-23 05:34:41,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-23 05:34:41,157 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2022-07-23 05:34:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:41,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199387880] [2022-07-23 05:34:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:41,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,175 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 05:34:41,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:41,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199387880] [2022-07-23 05:34:41,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199387880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:41,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:41,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822529780] [2022-07-23 05:34:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:41,177 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 05:34:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:41,198 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-07-23 05:34:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:41,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 05:34:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:41,199 INFO L225 Difference]: With dead ends: 76 [2022-07-23 05:34:41,199 INFO L226 Difference]: Without dead ends: 76 [2022-07-23 05:34:41,199 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 05:34:41,200 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:41,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-23 05:34:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-23 05:34:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-07-23 05:34:41,202 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 21 [2022-07-23 05:34:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:41,202 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-07-23 05:34:41,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 05:34:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-07-23 05:34:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:34:41,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:41,203 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] [2022-07-23 05:34:41,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-23 05:34:41,203 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2022-07-23 05:34:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379653482] [2022-07-23 05:34:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:41,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,258 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 05:34:41,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:41,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379653482] [2022-07-23 05:34:41,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379653482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:41,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:41,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:34:41,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74155199] [2022-07-23 05:34:41,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:41,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:34:41,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:34:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:34:41,260 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 05:34:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:41,312 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-23 05:34:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:34:41,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 05:34:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:41,313 INFO L225 Difference]: With dead ends: 80 [2022-07-23 05:34:41,313 INFO L226 Difference]: Without dead ends: 80 [2022-07-23 05:34:41,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:41,314 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:41,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-23 05:34:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-07-23 05:34:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-07-23 05:34:41,317 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 21 [2022-07-23 05:34:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:41,317 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-07-23 05:34:41,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 05:34:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-07-23 05:34:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:34:41,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:41,318 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 05:34:41,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-23 05:34:41,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash -377785809, now seen corresponding path program 2 times [2022-07-23 05:34:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:41,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533926413] [2022-07-23 05:34:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:34:41,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533926413] [2022-07-23 05:34:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533926413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:41,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:34:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071510148] [2022-07-23 05:34:41,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:41,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:34:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:34:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:34:41,385 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 05:34:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:41,469 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2022-07-23 05:34:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:34:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 05:34:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:41,470 INFO L225 Difference]: With dead ends: 102 [2022-07-23 05:34:41,470 INFO L226 Difference]: Without dead ends: 102 [2022-07-23 05:34:41,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:34:41,474 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:41,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 148 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-23 05:34:41,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2022-07-23 05:34:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 70 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 05:34:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-07-23 05:34:41,476 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 21 [2022-07-23 05:34:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:41,476 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-07-23 05:34:41,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 05:34:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-07-23 05:34:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:34:41,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:41,478 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 05:34:41,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-23 05:34:41,478 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1923036781, now seen corresponding path program 1 times [2022-07-23 05:34:41,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:41,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604539108] [2022-07-23 05:34:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:41,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604539108] [2022-07-23 05:34:41,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604539108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768310450] [2022-07-23 05:34:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:41,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:41,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:41,616 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 05:34:41,631 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 05:34:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:41,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:34:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:41,796 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 05:34:41,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:41,886 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:41,886 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 05:34:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:41,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:41,946 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 13 treesize of output 11 [2022-07-23 05:34:41,949 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 20 treesize of output 18 [2022-07-23 05:34:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768310450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:42,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-07-23 05:34:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463236694] [2022-07-23 05:34:42,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:34:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:34:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:34:42,160 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:42,452 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-23 05:34:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:34:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 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 05:34:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:42,453 INFO L225 Difference]: With dead ends: 95 [2022-07-23 05:34:42,453 INFO L226 Difference]: Without dead ends: 95 [2022-07-23 05:34:42,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:34:42,453 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:42,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 301 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-07-23 05:34:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-23 05:34:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-07-23 05:34:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-07-23 05:34:42,455 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 21 [2022-07-23 05:34:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:42,455 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-07-23 05:34:42,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-07-23 05:34:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:34:42,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:42,456 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 05:34:42,475 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 05:34:42,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-23 05:34:42,656 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2022-07-23 05:34:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:42,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129708877] [2022-07-23 05:34:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:42,734 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 05:34:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:42,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129708877] [2022-07-23 05:34:42,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129708877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:42,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:42,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:34:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227191367] [2022-07-23 05:34:42,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:42,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:34:42,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:34:42,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:34:42,741 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 05:34:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:42,812 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2022-07-23 05:34:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:34:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 05:34:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:42,814 INFO L225 Difference]: With dead ends: 126 [2022-07-23 05:34:42,814 INFO L226 Difference]: Without dead ends: 126 [2022-07-23 05:34:42,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:34:42,814 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:42,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-23 05:34:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2022-07-23 05:34:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 119 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-07-23 05:34:42,817 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 24 [2022-07-23 05:34:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:42,817 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-07-23 05:34:42,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 05:34:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-07-23 05:34:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:34:42,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:42,818 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 05:34:42,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-23 05:34:42,819 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2022-07-23 05:34:42,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:42,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282158142] [2022-07-23 05:34:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:42,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:42,965 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 05:34:42,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:42,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282158142] [2022-07-23 05:34:42,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282158142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:42,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:42,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-23 05:34:42,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252080792] [2022-07-23 05:34:42,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:42,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:34:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:34:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:34:42,967 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 05:34:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:43,166 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2022-07-23 05:34:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:34:43,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 05:34:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:43,167 INFO L225 Difference]: With dead ends: 142 [2022-07-23 05:34:43,167 INFO L226 Difference]: Without dead ends: 142 [2022-07-23 05:34:43,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:34:43,168 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:43,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 199 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-23 05:34:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2022-07-23 05:34:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-07-23 05:34:43,170 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 24 [2022-07-23 05:34:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:43,170 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-07-23 05:34:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 05:34:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-07-23 05:34:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:34:43,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:43,170 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 05:34:43,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-23 05:34:43,171 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1709753857, now seen corresponding path program 1 times [2022-07-23 05:34:43,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053673663] [2022-07-23 05:34:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:43,317 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 05:34:43,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:43,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053673663] [2022-07-23 05:34:43,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053673663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:43,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:43,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:34:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188762501] [2022-07-23 05:34:43,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:43,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:34:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:34:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:34:43,319 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 05:34:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:43,523 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2022-07-23 05:34:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 05:34:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:43,524 INFO L225 Difference]: With dead ends: 172 [2022-07-23 05:34:43,524 INFO L226 Difference]: Without dead ends: 172 [2022-07-23 05:34:43,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:34:43,525 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 124 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:43,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 171 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-23 05:34:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2022-07-23 05:34:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 127 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 153 transitions. [2022-07-23 05:34:43,527 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 153 transitions. Word has length 24 [2022-07-23 05:34:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:43,528 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 153 transitions. [2022-07-23 05:34:43,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 05:34:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 153 transitions. [2022-07-23 05:34:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:34:43,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:43,528 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 05:34:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-23 05:34:43,528 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2022-07-23 05:34:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:43,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625813292] [2022-07-23 05:34:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:43,592 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 05:34:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:43,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625813292] [2022-07-23 05:34:43,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625813292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:43,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:43,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:34:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965580329] [2022-07-23 05:34:43,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:34:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:34:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:34:43,594 INFO L87 Difference]: Start difference. First operand 128 states and 153 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 05:34:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:43,605 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2022-07-23 05:34:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:34:43,606 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 05:34:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:43,606 INFO L225 Difference]: With dead ends: 127 [2022-07-23 05:34:43,606 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:34:43,607 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 05:34:43,607 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:43,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:34:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-23 05:34:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2022-07-23 05:34:43,609 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 25 [2022-07-23 05:34:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:43,610 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2022-07-23 05:34:43,610 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 05:34:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2022-07-23 05:34:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:34:43,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:43,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:43,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-23 05:34:43,627 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240330, now seen corresponding path program 2 times [2022-07-23 05:34:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175737176] [2022-07-23 05:34:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:43,689 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 05:34:43,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175737176] [2022-07-23 05:34:43,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175737176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225252933] [2022-07-23 05:34:43,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:34:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:43,691 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 05:34:43,692 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 05:34:43,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:34:43,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:43,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 05:34:43,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:43,766 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:43,769 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 05:34:43,881 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 05:34:43,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225252933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:44,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:44,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-07-23 05:34:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808845118] [2022-07-23 05:34:44,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:34:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:34:44,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:34:44,044 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 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 05:34:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:44,284 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2022-07-23 05:34:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 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) Word has length 25 [2022-07-23 05:34:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:44,285 INFO L225 Difference]: With dead ends: 137 [2022-07-23 05:34:44,285 INFO L226 Difference]: Without dead ends: 137 [2022-07-23 05:34:44,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:34:44,286 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 170 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:44,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 187 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-23 05:34:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 102. [2022-07-23 05:34:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 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 05:34:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2022-07-23 05:34:44,288 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 25 [2022-07-23 05:34:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:44,288 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2022-07-23 05:34:44,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 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 05:34:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2022-07-23 05:34:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:34:44,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:44,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:44,319 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 05:34:44,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:44,503 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:44,504 INFO L85 PathProgramCache]: Analyzing trace with hash -67455619, now seen corresponding path program 1 times [2022-07-23 05:34:44,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:44,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068884397] [2022-07-23 05:34:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,569 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 05:34:44,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068884397] [2022-07-23 05:34:44,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068884397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788766277] [2022-07-23 05:34:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:44,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:44,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:44,571 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 05:34:44,611 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 05:34:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:44,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 05:34:44,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:44,670 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:44,670 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 05:34:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:44,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788766277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:44,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:44,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-07-23 05:34:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422149673] [2022-07-23 05:34:44,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:44,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:34:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:34:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:34:44,989 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 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 05:34:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:45,420 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2022-07-23 05:34:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:34:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 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 05:34:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:45,421 INFO L225 Difference]: With dead ends: 140 [2022-07-23 05:34:45,421 INFO L226 Difference]: Without dead ends: 134 [2022-07-23 05:34:45,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:34:45,424 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:45,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 188 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-23 05:34:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 118. [2022-07-23 05:34:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 115 states have (on average 1.173913043478261) internal successors, (135), 117 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2022-07-23 05:34:45,429 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 27 [2022-07-23 05:34:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:45,429 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2022-07-23 05:34:45,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 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 05:34:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2022-07-23 05:34:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:34:45,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:45,430 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 05:34:45,466 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 05:34:45,643 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,SelfDestructingSolverStorable31 [2022-07-23 05:34:45,644 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash -67409757, now seen corresponding path program 3 times [2022-07-23 05:34:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586560321] [2022-07-23 05:34:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:45,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586560321] [2022-07-23 05:34:45,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586560321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:45,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965170137] [2022-07-23 05:34:45,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:34:45,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:45,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:45,955 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 05:34:45,956 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 05:34:46,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:34:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-23 05:34:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:46,157 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:34:46,241 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:46,241 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 1 case distinctions, treesize of input 23 treesize of output 11 [2022-07-23 05:34:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:46,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:46,307 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 29 treesize of output 25 [2022-07-23 05:34:46,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:46,309 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 45 treesize of output 39 [2022-07-23 05:34:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:46,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965170137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:46,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:46,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-07-23 05:34:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702351237] [2022-07-23 05:34:46,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:46,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 05:34:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 05:34:46,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:34:46,489 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:47,380 INFO L93 Difference]: Finished difference Result 203 states and 227 transitions. [2022-07-23 05:34:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 05:34:47,381 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 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 05:34:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:47,381 INFO L225 Difference]: With dead ends: 203 [2022-07-23 05:34:47,381 INFO L226 Difference]: Without dead ends: 196 [2022-07-23 05:34:47,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=516, Invalid=1646, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:34:47,383 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 312 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:47,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 192 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:34:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-23 05:34:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 140. [2022-07-23 05:34:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.167883211678832) internal successors, (160), 139 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2022-07-23 05:34:47,386 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 27 [2022-07-23 05:34:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:47,386 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2022-07-23 05:34:47,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2022-07-23 05:34:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:34:47,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:47,387 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 05:34:47,404 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 05:34:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:47,603 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -438004926, now seen corresponding path program 1 times [2022-07-23 05:34:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713894290] [2022-07-23 05:34:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:34:47,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713894290] [2022-07-23 05:34:47,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713894290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024167383] [2022-07-23 05:34:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:47,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:47,658 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 05:34:47,659 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 05:34:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:34:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:34:47,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:34:47,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024167383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:47,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:47,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-07-23 05:34:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105465030] [2022-07-23 05:34:47,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:47,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:34:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:47,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:34:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:34:47,822 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:47,928 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2022-07-23 05:34:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:34:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-23 05:34:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:47,929 INFO L225 Difference]: With dead ends: 169 [2022-07-23 05:34:47,929 INFO L226 Difference]: Without dead ends: 169 [2022-07-23 05:34:47,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:34:47,930 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:47,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 161 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-23 05:34:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2022-07-23 05:34:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 136 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2022-07-23 05:34:47,933 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 28 [2022-07-23 05:34:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:47,933 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2022-07-23 05:34:47,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2022-07-23 05:34:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:34:47,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:47,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:47,953 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 05:34:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-23 05:34:48,134 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash -35087801, now seen corresponding path program 1 times [2022-07-23 05:34:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602294087] [2022-07-23 05:34:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:34:48,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602294087] [2022-07-23 05:34:48,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602294087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:34:48,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:34:48,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:34:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948374502] [2022-07-23 05:34:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:34:48,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:34:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:34:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:34:48,268 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 05:34:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:48,347 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2022-07-23 05:34:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:34:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 30 [2022-07-23 05:34:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:48,348 INFO L225 Difference]: With dead ends: 159 [2022-07-23 05:34:48,348 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 05:34:48,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:34:48,348 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:48,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 132 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:34:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 05:34:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2022-07-23 05:34:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 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 05:34:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-07-23 05:34:48,350 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 30 [2022-07-23 05:34:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:48,350 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-07-23 05:34:48,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 05:34:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-07-23 05:34:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:34:48,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:48,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:48,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-23 05:34:48,351 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666176, now seen corresponding path program 4 times [2022-07-23 05:34:48,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691123328] [2022-07-23 05:34:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:48,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691123328] [2022-07-23 05:34:48,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691123328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:48,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590538258] [2022-07-23 05:34:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:34:48,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:48,478 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 05:34:48,480 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 05:34:48,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:34:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:48,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-23 05:34:48,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:48,618 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:48,619 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 05:34:48,693 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 05:34:48,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:34:48,852 INFO L356 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2022-07-23 05:34:48,852 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 29 [2022-07-23 05:34:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:34:48,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:49,165 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 29 treesize of output 25 [2022-07-23 05:34:49,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:34:49,169 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 45 treesize of output 39 [2022-07-23 05:34:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:34:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590538258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:49,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:49,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-07-23 05:34:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072568547] [2022-07-23 05:34:49,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:49,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:34:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:34:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:34:49,415 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 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 05:34:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:50,061 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-07-23 05:34:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:34:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 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 31 [2022-07-23 05:34:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:50,066 INFO L225 Difference]: With dead ends: 153 [2022-07-23 05:34:50,066 INFO L226 Difference]: Without dead ends: 153 [2022-07-23 05:34:50,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:34:50,067 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 135 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:50,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 288 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-07-23 05:34:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-23 05:34:50,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2022-07-23 05:34:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2022-07-23 05:34:50,069 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 31 [2022-07-23 05:34:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:50,069 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2022-07-23 05:34:50,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 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 05:34:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2022-07-23 05:34:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 05:34:50,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:50,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:50,087 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 05:34:50,287 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,SelfDestructingSolverStorable35 [2022-07-23 05:34:50,287 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash -992295355, now seen corresponding path program 2 times [2022-07-23 05:34:50,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557452421] [2022-07-23 05:34:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:50,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:50,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557452421] [2022-07-23 05:34:50,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557452421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:50,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350261243] [2022-07-23 05:34:50,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:34:50,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:50,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:50,396 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 05:34:50,397 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 05:34:50,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:34:50,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:34:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:50,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:50,629 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 05:34:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350261243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:50,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:50,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-23 05:34:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35329717] [2022-07-23 05:34:50,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:50,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:34:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:34:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:34:50,654 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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 05:34:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:50,836 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2022-07-23 05:34:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:34:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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) Word has length 32 [2022-07-23 05:34:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:50,837 INFO L225 Difference]: With dead ends: 140 [2022-07-23 05:34:50,837 INFO L226 Difference]: Without dead ends: 140 [2022-07-23 05:34:50,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:34:50,838 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:50,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 213 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:34:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-23 05:34:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2022-07-23 05:34:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 128 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2022-07-23 05:34:50,840 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 32 [2022-07-23 05:34:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:50,840 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2022-07-23 05:34:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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 05:34:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2022-07-23 05:34:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:34:50,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:50,841 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 05:34:50,858 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 05:34:51,058 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,SelfDestructingSolverStorable36 [2022-07-23 05:34:51,058 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1626154062, now seen corresponding path program 5 times [2022-07-23 05:34:51,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:51,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684284157] [2022-07-23 05:34:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:51,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684284157] [2022-07-23 05:34:51,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684284157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150912606] [2022-07-23 05:34:51,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:34:51,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:51,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:51,161 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 05:34:51,162 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 05:34:51,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-23 05:34:51,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:34:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:51,252 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:34:51,252 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 05:34:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:34:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150912606] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:51,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-07-23 05:34:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721541515] [2022-07-23 05:34:51,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:51,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:34:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:34:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:34:51,612 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 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 05:34:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:52,008 INFO L93 Difference]: Finished difference Result 251 states and 274 transitions. [2022-07-23 05:34:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:34:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 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 35 [2022-07-23 05:34:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:52,009 INFO L225 Difference]: With dead ends: 251 [2022-07-23 05:34:52,009 INFO L226 Difference]: Without dead ends: 238 [2022-07-23 05:34:52,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:34:52,010 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 227 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:52,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 281 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:34:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-23 05:34:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 148. [2022-07-23 05:34:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1655172413793105) 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 05:34:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-07-23 05:34:52,012 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 35 [2022-07-23 05:34:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:52,012 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-07-23 05:34:52,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 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 05:34:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-07-23 05:34:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 05:34:52,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:52,013 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:34:52,032 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 05:34:52,213 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,SelfDestructingSolverStorable37 [2022-07-23 05:34:52,213 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 3 times [2022-07-23 05:34:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:52,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824454526] [2022-07-23 05:34:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:52,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:52,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824454526] [2022-07-23 05:34:52,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824454526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820194628] [2022-07-23 05:34:52,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:34:52,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:52,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:52,378 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 05:34:52,380 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 05:34:52,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:34:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:52,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-23 05:34:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:52,462 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 05:34:52,562 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 11 treesize of output 7 [2022-07-23 05:34:52,568 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 05:34:52,604 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 05:34:52,634 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 05:34:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:34:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:52,649 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_592) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:34:52,653 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_592) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:34:52,660 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_592) |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 05:34:52,666 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:52,667 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 05:34:52,671 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:52,671 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 05:34:52,676 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 05:34:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-07-23 05:34:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820194628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:52,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:52,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-07-23 05:34:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173441197] [2022-07-23 05:34:52,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:52,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:34:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:34:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=433, Unknown=3, NotChecked=132, Total=650 [2022-07-23 05:34:52,791 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 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 05:34:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:53,020 INFO L93 Difference]: Finished difference Result 253 states and 286 transitions. [2022-07-23 05:34:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:34:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 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 36 [2022-07-23 05:34:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:53,021 INFO L225 Difference]: With dead ends: 253 [2022-07-23 05:34:53,021 INFO L226 Difference]: Without dead ends: 215 [2022-07-23 05:34:53,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=645, Unknown=3, NotChecked=162, Total=930 [2022-07-23 05:34:53,022 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 65 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:53,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 343 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-07-23 05:34:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-23 05:34:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 206. [2022-07-23 05:34:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 203 states have (on average 1.1576354679802956) internal successors, (235), 205 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 05:34:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 235 transitions. [2022-07-23 05:34:53,025 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 235 transitions. Word has length 36 [2022-07-23 05:34:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:53,025 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 235 transitions. [2022-07-23 05:34:53,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 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 05:34:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 235 transitions. [2022-07-23 05:34:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 05:34:53,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:53,026 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 05:34:53,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-23 05:34:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:53,239 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash 634400591, now seen corresponding path program 6 times [2022-07-23 05:34:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712162432] [2022-07-23 05:34:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:53,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:53,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:53,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712162432] [2022-07-23 05:34:53,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712162432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:53,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293025114] [2022-07-23 05:34:53,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:34:53,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:53,676 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 05:34:53,676 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 05:34:53,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-23 05:34:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 05:34:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:54,017 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 05:34:54,245 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:34:54,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 19 [2022-07-23 05:34:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:54,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:34:54,381 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 59 treesize of output 51 [2022-07-23 05:34:54,384 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-23 05:34:54,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 81 [2022-07-23 05:34:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:34:54,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293025114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:34:54,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:34:54,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2022-07-23 05:34:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000470530] [2022-07-23 05:34:54,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:34:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-23 05:34:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:34:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-23 05:34:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:34:54,738 INFO L87 Difference]: Start difference. First operand 206 states and 235 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:34:59,412 INFO L93 Difference]: Finished difference Result 457 states and 500 transitions. [2022-07-23 05:34:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-23 05:34:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 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 05:34:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:34:59,416 INFO L225 Difference]: With dead ends: 457 [2022-07-23 05:34:59,416 INFO L226 Difference]: Without dead ends: 435 [2022-07-23 05:34:59,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2404, Invalid=10478, Unknown=0, NotChecked=0, Total=12882 [2022-07-23 05:34:59,419 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 583 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:34:59,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 529 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:34:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-07-23 05:34:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 218. [2022-07-23 05:34:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 215 states have (on average 1.158139534883721) internal successors, (249), 217 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 249 transitions. [2022-07-23 05:34:59,423 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 249 transitions. Word has length 39 [2022-07-23 05:34:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:34:59,423 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 249 transitions. [2022-07-23 05:34:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:34:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 249 transitions. [2022-07-23 05:34:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 05:34:59,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:34:59,424 INFO L195 NwaCegarLoop]: trace histogram [3, 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 05:34:59,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-23 05:34:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-23 05:34:59,641 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:34:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:34:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1413686832, now seen corresponding path program 4 times [2022-07-23 05:34:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:34:59,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521035583] [2022-07-23 05:34:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:34:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:34:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:34:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:34:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:34:59,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521035583] [2022-07-23 05:34:59,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521035583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:34:59,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913048729] [2022-07-23 05:34:59,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:34:59,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:34:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:34:59,692 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 05:34:59,693 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 05:34:59,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:34:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:34:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-23 05:34:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:34:59,782 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 05:34:59,785 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 05:34:59,956 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 05:34:59,976 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 05:35:00,083 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 05:35:00,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:00,147 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 18 treesize of output 7 [2022-07-23 05:35:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:00,315 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:00,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 05:35:00,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:00,320 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 33 treesize of output 33 [2022-07-23 05:35:00,323 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 05:35:00,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:00,739 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 05:35:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:00,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913048729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:00,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:00,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-07-23 05:35:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811700363] [2022-07-23 05:35:00,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:35:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:00,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:35:00,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=762, Unknown=2, NotChecked=0, Total=870 [2022-07-23 05:35:00,749 INFO L87 Difference]: Start difference. First operand 218 states and 249 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:01,490 INFO L93 Difference]: Finished difference Result 221 states and 247 transitions. [2022-07-23 05:35:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:35:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 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 40 [2022-07-23 05:35:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:01,491 INFO L225 Difference]: With dead ends: 221 [2022-07-23 05:35:01,491 INFO L226 Difference]: Without dead ends: 221 [2022-07-23 05:35:01,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=446, Invalid=2308, Unknown=2, NotChecked=0, Total=2756 [2022-07-23 05:35:01,493 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 276 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:01,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 209 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 292 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-07-23 05:35:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-23 05:35:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2022-07-23 05:35:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 244 transitions. [2022-07-23 05:35:01,497 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 244 transitions. Word has length 40 [2022-07-23 05:35:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:01,497 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 244 transitions. [2022-07-23 05:35:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 244 transitions. [2022-07-23 05:35:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 05:35:01,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:01,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:01,524 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 05:35:01,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:01,711 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 1 times [2022-07-23 05:35:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317408542] [2022-07-23 05:35:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:01,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317408542] [2022-07-23 05:35:01,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317408542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771693425] [2022-07-23 05:35:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:01,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:01,848 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 05:35:01,849 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 05:35:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:01,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-23 05:35:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:01,946 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:01,946 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 05:35:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:02,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771693425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:02,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:02,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-07-23 05:35:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71792423] [2022-07-23 05:35:02,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:35:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:35:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:35:02,424 INFO L87 Difference]: Start difference. First operand 215 states and 244 transitions. Second operand has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:02,800 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2022-07-23 05:35:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:35:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 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 05:35:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:02,802 INFO L225 Difference]: With dead ends: 243 [2022-07-23 05:35:02,802 INFO L226 Difference]: Without dead ends: 236 [2022-07-23 05:35:02,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1572, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:35:02,803 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 332 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:02,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 265 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:35:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-23 05:35:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 225. [2022-07-23 05:35:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 224 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2022-07-23 05:35:02,809 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 41 [2022-07-23 05:35:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:02,809 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2022-07-23 05:35:02,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2022-07-23 05:35:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 05:35:02,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:02,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:02,854 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 05:35:03,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:03,036 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1605342100, now seen corresponding path program 7 times [2022-07-23 05:35:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:03,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967586242] [2022-07-23 05:35:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:03,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967586242] [2022-07-23 05:35:03,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967586242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:03,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798277000] [2022-07-23 05:35:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:35:03,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:03,177 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 05:35:03,178 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 05:35:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-23 05:35:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:03,260 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:03,260 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 05:35:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:03,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:03,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798277000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:03,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:03,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2022-07-23 05:35:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74926026] [2022-07-23 05:35:03,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:03,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-23 05:35:03,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-23 05:35:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:35:03,953 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 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 05:35:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:04,620 INFO L93 Difference]: Finished difference Result 401 states and 440 transitions. [2022-07-23 05:35:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:35:04,621 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 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) Word has length 43 [2022-07-23 05:35:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:04,624 INFO L225 Difference]: With dead ends: 401 [2022-07-23 05:35:04,624 INFO L226 Difference]: Without dead ends: 401 [2022-07-23 05:35:04,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2022-07-23 05:35:04,625 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 356 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:04,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 388 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:35:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-07-23 05:35:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 231. [2022-07-23 05:35:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.144736842105263) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2022-07-23 05:35:04,631 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 43 [2022-07-23 05:35:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:04,631 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2022-07-23 05:35:04,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 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 05:35:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2022-07-23 05:35:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 05:35:04,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:04,632 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:04,651 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 05:35:04,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:04,849 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1392056413, now seen corresponding path program 2 times [2022-07-23 05:35:04,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104547815] [2022-07-23 05:35:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:04,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 05:35:05,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:05,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104547815] [2022-07-23 05:35:05,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104547815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:05,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899447325] [2022-07-23 05:35:05,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:05,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:05,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:05,128 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 05:35:05,151 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 05:35:05,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:05,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:35:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:05,423 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 05:35:05,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:05,542 INFO L356 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2022-07-23 05:35:05,542 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 28 treesize of output 20 [2022-07-23 05:35:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 05:35:05,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:05,627 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 29 treesize of output 25 [2022-07-23 05:35:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:05,630 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 45 treesize of output 39 [2022-07-23 05:35:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 05:35:05,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899447325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:05,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:05,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-07-23 05:35:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617606416] [2022-07-23 05:35:05,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-23 05:35:05,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-23 05:35:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:35:05,938 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) 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 05:35:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:06,496 INFO L93 Difference]: Finished difference Result 257 states and 288 transitions. [2022-07-23 05:35:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:35:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) 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 43 [2022-07-23 05:35:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:06,497 INFO L225 Difference]: With dead ends: 257 [2022-07-23 05:35:06,497 INFO L226 Difference]: Without dead ends: 250 [2022-07-23 05:35:06,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=2199, Unknown=0, NotChecked=0, Total=2652 [2022-07-23 05:35:06,498 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 217 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:06,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 251 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-07-23 05:35:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-23 05:35:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2022-07-23 05:35:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2022-07-23 05:35:06,502 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 43 [2022-07-23 05:35:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:06,502 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2022-07-23 05:35:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3846153846153846) 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 05:35:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2022-07-23 05:35:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 05:35:06,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:06,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:06,527 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 05:35:06,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:06,720 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash -701284269, now seen corresponding path program 5 times [2022-07-23 05:35:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:06,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721588735] [2022-07-23 05:35:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:06,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721588735] [2022-07-23 05:35:06,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721588735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271524075] [2022-07-23 05:35:06,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:35:06,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:06,826 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 05:35:06,828 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 05:35:06,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:35:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:35:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:07,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:07,127 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 22 treesize of output 18 [2022-07-23 05:35:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:07,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271524075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:07,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:07,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-23 05:35:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285596794] [2022-07-23 05:35:07,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:07,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:35:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:35:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:35:07,212 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:07,490 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2022-07-23 05:35:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:35:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 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 44 [2022-07-23 05:35:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:07,491 INFO L225 Difference]: With dead ends: 255 [2022-07-23 05:35:07,491 INFO L226 Difference]: Without dead ends: 255 [2022-07-23 05:35:07,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:35:07,492 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:07,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 428 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:35:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-23 05:35:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2022-07-23 05:35:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.1352459016393444) internal successors, (277), 246 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2022-07-23 05:35:07,495 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 44 [2022-07-23 05:35:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:07,495 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2022-07-23 05:35:07,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2022-07-23 05:35:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 05:35:07,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:07,495 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 05:35:07,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:07,696 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,SelfDestructingSolverStorable44 [2022-07-23 05:35:07,696 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -840498235, now seen corresponding path program 8 times [2022-07-23 05:35:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:07,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143166686] [2022-07-23 05:35:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:08,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143166686] [2022-07-23 05:35:08,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143166686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335652781] [2022-07-23 05:35:08,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:08,189 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 05:35:08,190 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 05:35:08,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:08,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-23 05:35:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:08,606 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 05:35:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:09,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:09,526 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 89 treesize of output 77 [2022-07-23 05:35:09,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:09,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 123 [2022-07-23 05:35:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:10,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335652781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:10,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:10,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 25] total 59 [2022-07-23 05:35:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455053180] [2022-07-23 05:35:10,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:10,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-23 05:35:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-23 05:35:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3095, Unknown=0, NotChecked=0, Total=3422 [2022-07-23 05:35:10,143 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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 05:35:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:12,383 INFO L93 Difference]: Finished difference Result 391 states and 441 transitions. [2022-07-23 05:35:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:35:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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) Word has length 45 [2022-07-23 05:35:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:12,386 INFO L225 Difference]: With dead ends: 391 [2022-07-23 05:35:12,386 INFO L226 Difference]: Without dead ends: 363 [2022-07-23 05:35:12,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1115, Invalid=6717, Unknown=0, NotChecked=0, Total=7832 [2022-07-23 05:35:12,388 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 297 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:12,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 382 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 548 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2022-07-23 05:35:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-23 05:35:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 315. [2022-07-23 05:35:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 312 states have (on average 1.1506410256410255) internal successors, (359), 314 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 359 transitions. [2022-07-23 05:35:12,393 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 359 transitions. Word has length 45 [2022-07-23 05:35:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:12,394 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 359 transitions. [2022-07-23 05:35:12,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 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 05:35:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 359 transitions. [2022-07-23 05:35:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:35:12,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:12,407 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:12,428 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 05:35:12,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-23 05:35:12,621 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 800775488, now seen corresponding path program 3 times [2022-07-23 05:35:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:12,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012502628] [2022-07-23 05:35:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:12,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:12,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012502628] [2022-07-23 05:35:12,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012502628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:12,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179059638] [2022-07-23 05:35:12,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:12,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:12,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:12,807 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 05:35:12,808 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 05:35:12,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:35:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-23 05:35:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:12,933 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:12,933 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 05:35:13,044 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 05:35:15,244 INFO L356 Elim1Store]: treesize reduction 2, result has 93.5 percent of original size [2022-07-23 05:35:15,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 39 [2022-07-23 05:35:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:15,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:15,855 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 27 treesize of output 23 [2022-07-23 05:35:15,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:15,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-07-23 05:35:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179059638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:16,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:16,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-07-23 05:35:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853475674] [2022-07-23 05:35:16,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-23 05:35:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-23 05:35:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1327, Unknown=1, NotChecked=0, Total=1482 [2022-07-23 05:35:16,259 INFO L87 Difference]: Start difference. First operand 315 states and 359 transitions. Second operand has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:17,631 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2022-07-23 05:35:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-23 05:35:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 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 05:35:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:17,632 INFO L225 Difference]: With dead ends: 381 [2022-07-23 05:35:17,632 INFO L226 Difference]: Without dead ends: 343 [2022-07-23 05:35:17,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=549, Invalid=4280, Unknown=1, NotChecked=0, Total=4830 [2022-07-23 05:35:17,633 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:17,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 413 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 941 Invalid, 0 Unknown, 162 Unchecked, 0.4s Time] [2022-07-23 05:35:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-23 05:35:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 301. [2022-07-23 05:35:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 298 states have (on average 1.1409395973154361) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2022-07-23 05:35:17,636 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 47 [2022-07-23 05:35:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:17,637 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2022-07-23 05:35:17,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2022-07-23 05:35:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:35:17,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:17,638 INFO L195 NwaCegarLoop]: trace histogram [4, 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 05:35:17,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-23 05:35:17,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:17,852 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 255004699, now seen corresponding path program 6 times [2022-07-23 05:35:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:17,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294109297] [2022-07-23 05:35:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:17,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:18,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294109297] [2022-07-23 05:35:18,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294109297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472000361] [2022-07-23 05:35:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:35:18,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:18,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:18,378 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 05:35:18,378 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 05:35:18,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-23 05:35:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-23 05:35:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:18,513 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 05:35:18,768 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 05:35:18,815 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 05:35:18,954 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 05:35:19,062 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 05:35:19,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:19,140 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:19,141 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 17 treesize of output 10 [2022-07-23 05:35:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:19,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:19,150 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:35:19,156 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:19,161 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_987 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_987) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:19,171 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:19,239 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:19,239 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 05:35:19,243 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:19,244 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 05:35:19,246 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 05:35:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 11 not checked. [2022-07-23 05:35:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472000361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:19,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 16] total 47 [2022-07-23 05:35:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192927598] [2022-07-23 05:35:19,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-23 05:35:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-23 05:35:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1677, Unknown=4, NotChecked=340, Total=2162 [2022-07-23 05:35:19,477 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:20,894 INFO L93 Difference]: Finished difference Result 426 states and 479 transitions. [2022-07-23 05:35:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-23 05:35:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 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 48 [2022-07-23 05:35:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:20,895 INFO L225 Difference]: With dead ends: 426 [2022-07-23 05:35:20,895 INFO L226 Difference]: Without dead ends: 374 [2022-07-23 05:35:20,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 4 IntricatePredicates, 4 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=468, Invalid=4514, Unknown=4, NotChecked=564, Total=5550 [2022-07-23 05:35:20,896 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 292 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:20,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 558 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 637 Invalid, 0 Unknown, 431 Unchecked, 0.2s Time] [2022-07-23 05:35:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-23 05:35:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2022-07-23 05:35:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 360 states have (on average 1.1305555555555555) internal successors, (407), 362 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 407 transitions. [2022-07-23 05:35:20,902 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 407 transitions. Word has length 48 [2022-07-23 05:35:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:20,902 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 407 transitions. [2022-07-23 05:35:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 407 transitions. [2022-07-23 05:35:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:35:20,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:20,905 INFO L195 NwaCegarLoop]: trace histogram [4, 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 05:35:20,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-23 05:35:21,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:21,120 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1859699616, now seen corresponding path program 1 times [2022-07-23 05:35:21,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:21,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145597610] [2022-07-23 05:35:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:21,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:35:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:21,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145597610] [2022-07-23 05:35:21,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145597610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:21,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062844124] [2022-07-23 05:35:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:21,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:21,331 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 05:35:21,331 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 05:35:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:35:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:21,638 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 05:35:21,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:21,686 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:21,687 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 05:35:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:35:21,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:21,722 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 13 treesize of output 11 [2022-07-23 05:35:21,724 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 20 treesize of output 18 [2022-07-23 05:35:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:35:22,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062844124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:22,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:22,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-07-23 05:35:22,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952696040] [2022-07-23 05:35:22,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:22,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:35:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:35:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:35:22,090 INFO L87 Difference]: Start difference. First operand 363 states and 407 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:22,766 INFO L93 Difference]: Finished difference Result 366 states and 409 transitions. [2022-07-23 05:35:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:35:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 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 05:35:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:22,768 INFO L225 Difference]: With dead ends: 366 [2022-07-23 05:35:22,768 INFO L226 Difference]: Without dead ends: 361 [2022-07-23 05:35:22,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1792, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:35:22,769 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 178 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:22,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 205 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-07-23 05:35:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-07-23 05:35:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 358. [2022-07-23 05:35:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 355 states have (on average 1.1267605633802817) internal successors, (400), 357 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2022-07-23 05:35:22,773 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 50 [2022-07-23 05:35:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:22,774 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2022-07-23 05:35:22,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2022-07-23 05:35:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:35:22,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:22,775 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:22,799 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 05:35:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-23 05:35:22,988 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -107318273, now seen corresponding path program 9 times [2022-07-23 05:35:22,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842701213] [2022-07-23 05:35:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:23,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:23,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842701213] [2022-07-23 05:35:23,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842701213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:23,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771136134] [2022-07-23 05:35:23,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:23,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:23,179 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 05:35:23,180 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 05:35:23,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-23 05:35:23,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-23 05:35:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:23,326 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:23,326 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 05:35:23,586 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 05:35:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:24,281 INFO L356 Elim1Store]: treesize reduction 30, result has 74.4 percent of original size [2022-07-23 05:35:24,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 65 treesize of output 113 [2022-07-23 05:35:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 05:35:24,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:25,301 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 87 treesize of output 75 [2022-07-23 05:35:25,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:25,330 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:25,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 167 [2022-07-23 05:35:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 05:35:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771136134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:26,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:26,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 22] total 59 [2022-07-23 05:35:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260967875] [2022-07-23 05:35:26,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:26,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-23 05:35:26,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-23 05:35:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3176, Unknown=0, NotChecked=0, Total=3540 [2022-07-23 05:35:26,169 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:29,138 INFO L93 Difference]: Finished difference Result 417 states and 474 transitions. [2022-07-23 05:35:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-23 05:35:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 05:35:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:29,140 INFO L225 Difference]: With dead ends: 417 [2022-07-23 05:35:29,140 INFO L226 Difference]: Without dead ends: 417 [2022-07-23 05:35:29,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1506, Invalid=10704, Unknown=0, NotChecked=0, Total=12210 [2022-07-23 05:35:29,142 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:29,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 398 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 231 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-07-23 05:35:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-23 05:35:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 394. [2022-07-23 05:35:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 391 states have (on average 1.145780051150895) internal successors, (448), 393 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 448 transitions. [2022-07-23 05:35:29,147 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 448 transitions. Word has length 53 [2022-07-23 05:35:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:29,147 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 448 transitions. [2022-07-23 05:35:29,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 448 transitions. [2022-07-23 05:35:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:35:29,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:29,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:29,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-23 05:35:29,349 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,SelfDestructingSolverStorable49 [2022-07-23 05:35:29,350 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1047745379, now seen corresponding path program 2 times [2022-07-23 05:35:29,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:29,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248225811] [2022-07-23 05:35:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:29,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 05:35:29,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248225811] [2022-07-23 05:35:29,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248225811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381589485] [2022-07-23 05:35:29,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:29,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:29,771 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 05:35:29,772 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 05:35:29,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:29,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-23 05:35:29,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:29,889 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 10 treesize of output 8 [2022-07-23 05:35:30,092 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 05:35:30,124 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 05:35:30,205 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 05:35:30,257 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 05:35:30,301 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 05:35:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 05:35:30,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:30,313 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:35:30,317 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:30,321 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int)) (v_ArrVal_1150 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1150) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:30,327 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:30,337 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:35:30,342 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:30,343 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 05:35:30,347 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:30,347 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 05:35:30,349 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 05:35:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 11 not checked. [2022-07-23 05:35:30,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381589485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:30,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:30,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 41 [2022-07-23 05:35:30,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293181734] [2022-07-23 05:35:30,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:30,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-23 05:35:30,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-23 05:35:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1137, Unknown=5, NotChecked=360, Total=1640 [2022-07-23 05:35:30,531 INFO L87 Difference]: Start difference. First operand 394 states and 448 transitions. Second operand has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 41 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 05:35:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:31,157 INFO L93 Difference]: Finished difference Result 482 states and 553 transitions. [2022-07-23 05:35:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:35:31,158 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 41 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 54 [2022-07-23 05:35:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:31,159 INFO L225 Difference]: With dead ends: 482 [2022-07-23 05:35:31,160 INFO L226 Difference]: Without dead ends: 459 [2022-07-23 05:35:31,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=1857, Unknown=5, NotChecked=460, Total=2550 [2022-07-23 05:35:31,160 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 112 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:31,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 649 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 646 Invalid, 0 Unknown, 410 Unchecked, 0.3s Time] [2022-07-23 05:35:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-23 05:35:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 441. [2022-07-23 05:35:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 438 states have (on average 1.1529680365296804) internal successors, (505), 440 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 505 transitions. [2022-07-23 05:35:31,167 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 505 transitions. Word has length 54 [2022-07-23 05:35:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:31,167 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 505 transitions. [2022-07-23 05:35:31,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 41 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 05:35:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 505 transitions. [2022-07-23 05:35:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:35:31,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:31,169 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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 05:35:31,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-23 05:35:31,383 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,SelfDestructingSolverStorable50 [2022-07-23 05:35:31,383 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -477173151, now seen corresponding path program 7 times [2022-07-23 05:35:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467295627] [2022-07-23 05:35:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:31,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:31,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:31,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467295627] [2022-07-23 05:35:31,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467295627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:31,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533448528] [2022-07-23 05:35:31,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:35:31,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:31,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:31,536 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 05:35:31,538 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 05:35:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:35:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:31,661 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 05:35:31,663 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 05:35:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:31,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:32,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533448528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:32,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:32,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-07-23 05:35:32,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747153323] [2022-07-23 05:35:32,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:32,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:35:32,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:35:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:35:32,258 INFO L87 Difference]: Start difference. First operand 441 states and 505 transitions. Second operand has 33 states, 32 states have (on average 3.8125) internal successors, (122), 33 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 05:35:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:32,889 INFO L93 Difference]: Finished difference Result 463 states and 520 transitions. [2022-07-23 05:35:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:35:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.8125) internal successors, (122), 33 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) Word has length 56 [2022-07-23 05:35:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:32,890 INFO L225 Difference]: With dead ends: 463 [2022-07-23 05:35:32,890 INFO L226 Difference]: Without dead ends: 463 [2022-07-23 05:35:32,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:35:32,892 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 339 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:32,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 477 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:35:32,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-23 05:35:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 446. [2022-07-23 05:35:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 443 states have (on average 1.1512415349887133) internal successors, (510), 445 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 510 transitions. [2022-07-23 05:35:32,897 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 510 transitions. Word has length 56 [2022-07-23 05:35:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:32,897 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 510 transitions. [2022-07-23 05:35:32,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.8125) internal successors, (122), 33 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 05:35:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 510 transitions. [2022-07-23 05:35:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:35:32,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:32,898 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 05:35:32,915 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 05:35:33,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:33,099 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1089586808, now seen corresponding path program 4 times [2022-07-23 05:35:33,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:33,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310791633] [2022-07-23 05:35:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:33,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:33,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310791633] [2022-07-23 05:35:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310791633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368946569] [2022-07-23 05:35:33,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:35:33,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:33,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:33,260 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 05:35:33,261 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 05:35:33,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:35:33,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-23 05:35:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:33,385 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:33,385 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-23 05:35:33,392 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 05:35:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-23 05:35:33,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:34,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-23 05:35:34,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368946569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:34,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:34,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-23 05:35:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080292417] [2022-07-23 05:35:34,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:35:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:35:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:35:34,156 INFO L87 Difference]: Start difference. First operand 446 states and 510 transitions. Second operand has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 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 05:35:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:36,968 INFO L93 Difference]: Finished difference Result 504 states and 563 transitions. [2022-07-23 05:35:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-23 05:35:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 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) Word has length 59 [2022-07-23 05:35:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:36,970 INFO L225 Difference]: With dead ends: 504 [2022-07-23 05:35:36,970 INFO L226 Difference]: Without dead ends: 504 [2022-07-23 05:35:36,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1097, Invalid=5875, Unknown=0, NotChecked=0, Total=6972 [2022-07-23 05:35:36,971 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 440 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:36,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 503 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1197 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2022-07-23 05:35:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-23 05:35:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 476. [2022-07-23 05:35:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 473 states have (on average 1.150105708245243) internal successors, (544), 475 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 544 transitions. [2022-07-23 05:35:36,977 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 544 transitions. Word has length 59 [2022-07-23 05:35:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:36,977 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 544 transitions. [2022-07-23 05:35:36,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 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 05:35:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 544 transitions. [2022-07-23 05:35:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:35:36,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:36,978 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:37,001 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 05:35:37,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:37,196 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -193422740, now seen corresponding path program 5 times [2022-07-23 05:35:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849919311] [2022-07-23 05:35:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:37,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:37,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:37,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849919311] [2022-07-23 05:35:37,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849919311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:37,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444976613] [2022-07-23 05:35:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:35:37,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:37,452 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 05:35:37,453 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 05:35:37,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-23 05:35:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 05:35:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:37,594 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:37,595 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 05:35:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:38,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444976613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:38,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:38,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-07-23 05:35:38,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054815984] [2022-07-23 05:35:38,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:38,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-23 05:35:38,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-23 05:35:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:35:38,507 INFO L87 Difference]: Start difference. First operand 476 states and 544 transitions. Second operand has 47 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 47 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,380 INFO L93 Difference]: Finished difference Result 711 states and 787 transitions. [2022-07-23 05:35:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 05:35:39,380 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 47 states have internal predecessors, (153), 0 states have call successors, (0), 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 05:35:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,382 INFO L225 Difference]: With dead ends: 711 [2022-07-23 05:35:39,382 INFO L226 Difference]: Without dead ends: 685 [2022-07-23 05:35:39,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-07-23 05:35:39,383 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 222 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:39,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 470 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:35:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-07-23 05:35:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 475. [2022-07-23 05:35:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 472 states have (on average 1.1398305084745763) internal successors, (538), 474 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 538 transitions. [2022-07-23 05:35:39,390 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 538 transitions. Word has length 59 [2022-07-23 05:35:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,391 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 538 transitions. [2022-07-23 05:35:39,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 47 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 538 transitions. [2022-07-23 05:35:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-23 05:35:39,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,392 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:39,424 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 05:35:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:39,607 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1399784233, now seen corresponding path program 8 times [2022-07-23 05:35:39,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651780583] [2022-07-23 05:35:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651780583] [2022-07-23 05:35:40,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651780583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:40,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546050994] [2022-07-23 05:35:40,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:40,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:40,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:40,196 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 05:35:40,197 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 05:35:40,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-23 05:35:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:40,319 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 05:35:40,542 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 05:35:40,582 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 05:35:40,712 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 05:35:40,781 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 05:35:40,799 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 05:35:40,804 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 05:35:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 05:35:40,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:40,813 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:35:40,816 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:40,820 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1395 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1395) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:40,824 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:40,828 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1394 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1394) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:40,833 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:35:40,838 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:35:40,844 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:40,844 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 05:35:40,848 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:40,848 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 05:35:40,853 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 05:35:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 23 not checked. [2022-07-23 05:35:41,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546050994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:41,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:41,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 18] total 48 [2022-07-23 05:35:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085432471] [2022-07-23 05:35:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:35:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:35:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1533, Unknown=7, NotChecked=588, Total=2256 [2022-07-23 05:35:41,117 INFO L87 Difference]: Start difference. First operand 475 states and 538 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:43,116 INFO L93 Difference]: Finished difference Result 609 states and 683 transitions. [2022-07-23 05:35:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-23 05:35:43,117 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 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 60 [2022-07-23 05:35:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:43,118 INFO L225 Difference]: With dead ends: 609 [2022-07-23 05:35:43,118 INFO L226 Difference]: Without dead ends: 552 [2022-07-23 05:35:43,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 82 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=598, Invalid=5274, Unknown=8, NotChecked=1092, Total=6972 [2022-07-23 05:35:43,119 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 542 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:43,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 723 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1193 Invalid, 0 Unknown, 821 Unchecked, 0.5s Time] [2022-07-23 05:35:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-07-23 05:35:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 532. [2022-07-23 05:35:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 529 states have (on average 1.1323251417769375) internal successors, (599), 531 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 599 transitions. [2022-07-23 05:35:43,123 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 599 transitions. Word has length 60 [2022-07-23 05:35:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:43,123 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 599 transitions. [2022-07-23 05:35:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 599 transitions. [2022-07-23 05:35:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-23 05:35:43,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:43,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 05:35:43,143 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 05:35:43,341 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,SelfDestructingSolverStorable54 [2022-07-23 05:35:43,341 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2052733487, now seen corresponding path program 6 times [2022-07-23 05:35:43,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:43,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578188308] [2022-07-23 05:35:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:35:43,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:43,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578188308] [2022-07-23 05:35:43,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578188308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:43,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393170139] [2022-07-23 05:35:43,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:35:43,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:43,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:43,650 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 05:35:43,652 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 05:35:43,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:35:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:35:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:44,037 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 05:35:44,065 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 05:35:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:35:44,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:44,080 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 13 treesize of output 11 [2022-07-23 05:35:44,081 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 20 treesize of output 18 [2022-07-23 05:35:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:35:44,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393170139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:44,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:44,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-23 05:35:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333710142] [2022-07-23 05:35:44,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-23 05:35:44,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-23 05:35:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:35:44,358 INFO L87 Difference]: Start difference. First operand 532 states and 599 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 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 05:35:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:45,254 INFO L93 Difference]: Finished difference Result 578 states and 641 transitions. [2022-07-23 05:35:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:35:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 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) Word has length 61 [2022-07-23 05:35:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:45,256 INFO L225 Difference]: With dead ends: 578 [2022-07-23 05:35:45,256 INFO L226 Difference]: Without dead ends: 573 [2022-07-23 05:35:45,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2022-07-23 05:35:45,257 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 436 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:45,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 384 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 561 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-07-23 05:35:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-23 05:35:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 521. [2022-07-23 05:35:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 518 states have (on average 1.1274131274131274) internal successors, (584), 520 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 584 transitions. [2022-07-23 05:35:45,262 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 584 transitions. Word has length 61 [2022-07-23 05:35:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:45,262 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 584 transitions. [2022-07-23 05:35:45,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 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 05:35:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 584 transitions. [2022-07-23 05:35:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-23 05:35:45,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:45,263 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:45,280 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 05:35:45,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:45,479 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -881133237, now seen corresponding path program 7 times [2022-07-23 05:35:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:45,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866081268] [2022-07-23 05:35:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:35:45,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866081268] [2022-07-23 05:35:45,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866081268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060634237] [2022-07-23 05:35:45,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:35:45,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:45,811 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 05:35:45,811 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 05:35:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 05:35:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:46,248 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 05:35:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:46,472 INFO L356 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-07-23 05:35:46,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 31 [2022-07-23 05:35:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:35:46,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:46,600 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 44 treesize of output 38 [2022-07-23 05:35:46,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:46,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:46,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:46,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2022-07-23 05:35:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:35:47,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060634237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:47,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:47,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2022-07-23 05:35:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51348367] [2022-07-23 05:35:47,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-23 05:35:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-23 05:35:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 05:35:47,131 INFO L87 Difference]: Start difference. First operand 521 states and 584 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 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 05:35:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:47,941 INFO L93 Difference]: Finished difference Result 540 states and 601 transitions. [2022-07-23 05:35:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:35:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 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 61 [2022-07-23 05:35:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:47,942 INFO L225 Difference]: With dead ends: 540 [2022-07-23 05:35:47,943 INFO L226 Difference]: Without dead ends: 531 [2022-07-23 05:35:47,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=687, Invalid=3735, Unknown=0, NotChecked=0, Total=4422 [2022-07-23 05:35:47,943 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 226 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:47,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 334 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 444 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-07-23 05:35:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-23 05:35:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 518. [2022-07-23 05:35:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 515 states have (on average 1.1242718446601943) internal successors, (579), 517 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 579 transitions. [2022-07-23 05:35:47,957 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 579 transitions. Word has length 61 [2022-07-23 05:35:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:47,957 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 579 transitions. [2022-07-23 05:35:47,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 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 05:35:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 579 transitions. [2022-07-23 05:35:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-23 05:35:47,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:47,958 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:47,977 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 05:35:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:48,175 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -969356843, now seen corresponding path program 10 times [2022-07-23 05:35:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078071138] [2022-07-23 05:35:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 98 proven. 131 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:48,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078071138] [2022-07-23 05:35:48,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078071138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:48,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119993434] [2022-07-23 05:35:48,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:35:48,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:48,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:48,333 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 05:35:48,333 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 05:35:48,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:35:48,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-23 05:35:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:48,452 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:48,452 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 05:35:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 132 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:35:48,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 124 proven. 99 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:35:49,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119993434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:49,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:49,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 49 [2022-07-23 05:35:49,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091002267] [2022-07-23 05:35:49,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:49,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-23 05:35:49,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-23 05:35:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 05:35:49,020 INFO L87 Difference]: Start difference. First operand 518 states and 579 transitions. Second operand has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:49,800 INFO L93 Difference]: Finished difference Result 1030 states and 1118 transitions. [2022-07-23 05:35:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-23 05:35:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 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 05:35:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:49,803 INFO L225 Difference]: With dead ends: 1030 [2022-07-23 05:35:49,803 INFO L226 Difference]: Without dead ends: 1007 [2022-07-23 05:35:49,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1769, Invalid=5037, Unknown=0, NotChecked=0, Total=6806 [2022-07-23 05:35:49,804 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 490 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:49,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 253 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:35:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-07-23 05:35:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 600. [2022-07-23 05:35:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 597 states have (on average 1.1306532663316582) internal successors, (675), 599 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 675 transitions. [2022-07-23 05:35:49,813 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 675 transitions. Word has length 65 [2022-07-23 05:35:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:49,813 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 675 transitions. [2022-07-23 05:35:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 675 transitions. [2022-07-23 05:35:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-23 05:35:49,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:49,814 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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 05:35:49,840 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 05:35:50,037 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,SelfDestructingSolverStorable57 [2022-07-23 05:35:50,038 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1148899794, now seen corresponding path program 8 times [2022-07-23 05:35:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:50,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514016898] [2022-07-23 05:35:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:50,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:50,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514016898] [2022-07-23 05:35:50,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514016898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:50,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682106251] [2022-07-23 05:35:50,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:50,231 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 05:35:50,232 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 05:35:50,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:50,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-23 05:35:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:50,378 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:50,378 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 05:35:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:50,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 45 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 05:35:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682106251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:51,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:51,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-23 05:35:51,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656983982] [2022-07-23 05:35:51,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:51,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:35:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:35:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:35:51,146 INFO L87 Difference]: Start difference. First operand 600 states and 675 transitions. Second operand has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 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 05:35:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:51,701 INFO L93 Difference]: Finished difference Result 623 states and 696 transitions. [2022-07-23 05:35:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:35:51,701 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 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 65 [2022-07-23 05:35:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:51,703 INFO L225 Difference]: With dead ends: 623 [2022-07-23 05:35:51,703 INFO L226 Difference]: Without dead ends: 623 [2022-07-23 05:35:51,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=2942, Unknown=0, NotChecked=0, Total=3660 [2022-07-23 05:35:51,704 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 316 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:51,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 380 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:35:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-23 05:35:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 600. [2022-07-23 05:35:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 597 states have (on average 1.1306532663316582) internal successors, (675), 599 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 675 transitions. [2022-07-23 05:35:51,711 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 675 transitions. Word has length 65 [2022-07-23 05:35:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:51,711 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 675 transitions. [2022-07-23 05:35:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 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 05:35:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 675 transitions. [2022-07-23 05:35:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-23 05:35:51,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:51,713 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:51,745 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 05:35:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-23 05:35:51,931 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:35:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash 525787682, now seen corresponding path program 9 times [2022-07-23 05:35:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935415775] [2022-07-23 05:35:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:52,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935415775] [2022-07-23 05:35:52,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935415775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065571174] [2022-07-23 05:35:52,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:52,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:52,190 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 05:35:52,192 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 05:35:52,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-23 05:35:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-23 05:35:52,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:52,397 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:52,398 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 05:35:52,671 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 05:35:53,204 INFO L356 Elim1Store]: treesize reduction 18, result has 86.3 percent of original size [2022-07-23 05:35:53,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 49 treesize of output 135 [2022-07-23 05:35:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 05:35:53,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:55,290 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 66 treesize of output 56 [2022-07-23 05:35:55,330 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:55,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 166 [2022-07-23 05:35:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:35:56,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065571174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:56,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:56,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 62 [2022-07-23 05:35:56,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589099307] [2022-07-23 05:35:56,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:56,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-23 05:35:56,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-23 05:35:56,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3501, Unknown=1, NotChecked=0, Total=3906 [2022-07-23 05:35:56,286 INFO L87 Difference]: Start difference. First operand 600 states and 675 transitions. Second operand has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 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 05:36:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:02,178 INFO L93 Difference]: Finished difference Result 678 states and 756 transitions. [2022-07-23 05:36:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-23 05:36:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 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 65 [2022-07-23 05:36:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:02,181 INFO L225 Difference]: With dead ends: 678 [2022-07-23 05:36:02,181 INFO L226 Difference]: Without dead ends: 645 [2022-07-23 05:36:02,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4059 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2603, Invalid=15486, Unknown=1, NotChecked=0, Total=18090 [2022-07-23 05:36:02,182 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 226 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:02,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 612 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1320 Invalid, 0 Unknown, 461 Unchecked, 0.6s Time] [2022-07-23 05:36:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-07-23 05:36:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 577. [2022-07-23 05:36:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 574 states have (on average 1.1236933797909407) internal successors, (645), 576 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 645 transitions. [2022-07-23 05:36:02,189 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 645 transitions. Word has length 65 [2022-07-23 05:36:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:02,189 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 645 transitions. [2022-07-23 05:36:02,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 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 05:36:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 645 transitions. [2022-07-23 05:36:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-23 05:36:02,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:02,191 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:02,222 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 05:36:02,407 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,SelfDestructingSolverStorable59 [2022-07-23 05:36:02,407 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash 766851057, now seen corresponding path program 3 times [2022-07-23 05:36:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572863666] [2022-07-23 05:36:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:02,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 05:36:02,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572863666] [2022-07-23 05:36:02,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572863666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:02,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659648024] [2022-07-23 05:36:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:02,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:02,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:02,965 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 05:36:02,966 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 05:36:03,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 05:36:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:03,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-23 05:36:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:03,185 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 05:36:03,426 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 05:36:03,446 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 05:36:03,557 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 05:36:03,627 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 05:36:03,690 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 05:36:03,740 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 05:36:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-23 05:36:03,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:03,771 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:36:03,777 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:36:03,782 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int)) (v_ArrVal_1754 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1754) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:36:03,788 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:36:03,794 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int)) (v_ArrVal_1753 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1753) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:36:03,801 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:36:03,812 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:36:03,826 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:03,827 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 05:36:03,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:03,834 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 05:36:03,839 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 05:36:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 23 not checked. [2022-07-23 05:36:04,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659648024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:04,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:04,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 18] total 48 [2022-07-23 05:36:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497461814] [2022-07-23 05:36:04,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:04,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:36:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:36:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1509, Unknown=7, NotChecked=588, Total=2256 [2022-07-23 05:36:04,083 INFO L87 Difference]: Start difference. First operand 577 states and 645 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 48 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 05:36:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:05,254 INFO L93 Difference]: Finished difference Result 722 states and 806 transitions. [2022-07-23 05:36:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 05:36:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 48 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 66 [2022-07-23 05:36:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:05,257 INFO L225 Difference]: With dead ends: 722 [2022-07-23 05:36:05,257 INFO L226 Difference]: Without dead ends: 665 [2022-07-23 05:36:05,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 108 SyntacticMatches, 25 SemanticMatches, 58 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=2537, Unknown=7, NotChecked=756, Total=3540 [2022-07-23 05:36:05,257 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 102 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:05,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1167 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1471 Invalid, 0 Unknown, 674 Unchecked, 0.6s Time] [2022-07-23 05:36:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-23 05:36:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 632. [2022-07-23 05:36:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 629 states have (on average 1.1335453100158983) internal successors, (713), 631 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 713 transitions. [2022-07-23 05:36:05,265 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 713 transitions. Word has length 66 [2022-07-23 05:36:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:05,265 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 713 transitions. [2022-07-23 05:36:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 48 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 05:36:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 713 transitions. [2022-07-23 05:36:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 05:36:05,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:05,267 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:05,292 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 05:36:05,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:05,469 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1418151039, now seen corresponding path program 10 times [2022-07-23 05:36:05,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:05,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468020650] [2022-07-23 05:36:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:06,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468020650] [2022-07-23 05:36:06,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468020650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149210409] [2022-07-23 05:36:06,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:06,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:06,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:06,292 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 05:36:06,292 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 05:36:06,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:06,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-23 05:36:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:06,424 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 05:36:06,429 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 05:36:07,010 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 13 treesize of output 9 [2022-07-23 05:36:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:07,506 INFO L356 Elim1Store]: treesize reduction 26, result has 55.9 percent of original size [2022-07-23 05:36:07,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 55 [2022-07-23 05:36:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:07,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:08,574 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 74 treesize of output 64 [2022-07-23 05:36:08,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:08,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-07-23 05:36:09,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149210409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:09,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:09,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 77 [2022-07-23 05:36:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549535140] [2022-07-23 05:36:09,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-23 05:36:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-23 05:36:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=5359, Unknown=0, NotChecked=0, Total=5852 [2022-07-23 05:36:09,392 INFO L87 Difference]: Start difference. First operand 632 states and 713 transitions. Second operand has 77 states, 77 states have (on average 2.25974025974026) internal successors, (174), 77 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 05:36:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:15,924 INFO L93 Difference]: Finished difference Result 675 states and 753 transitions. [2022-07-23 05:36:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-23 05:36:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.25974025974026) internal successors, (174), 77 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) Word has length 67 [2022-07-23 05:36:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:15,926 INFO L225 Difference]: With dead ends: 675 [2022-07-23 05:36:15,927 INFO L226 Difference]: Without dead ends: 640 [2022-07-23 05:36:15,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6192 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1802, Invalid=18790, Unknown=0, NotChecked=0, Total=20592 [2022-07-23 05:36:15,928 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 424 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:15,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 597 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1413 Invalid, 0 Unknown, 299 Unchecked, 0.8s Time] [2022-07-23 05:36:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-07-23 05:36:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 619. [2022-07-23 05:36:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 616 states have (on average 1.1314935064935066) internal successors, (697), 618 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 697 transitions. [2022-07-23 05:36:15,935 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 697 transitions. Word has length 67 [2022-07-23 05:36:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:15,935 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 697 transitions. [2022-07-23 05:36:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.25974025974026) internal successors, (174), 77 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 05:36:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 697 transitions. [2022-07-23 05:36:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-23 05:36:15,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:15,937 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:15,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-23 05:36:16,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:16,152 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash -569162641, now seen corresponding path program 9 times [2022-07-23 05:36:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456440562] [2022-07-23 05:36:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-23 05:36:16,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:16,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456440562] [2022-07-23 05:36:16,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456440562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:16,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539903782] [2022-07-23 05:36:16,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:16,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:16,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:16,315 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 05:36:16,316 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 05:36:16,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 05:36:16,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:36:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:16,523 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:16,523 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 05:36:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-23 05:36:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-23 05:36:17,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539903782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:17,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:17,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-07-23 05:36:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182661888] [2022-07-23 05:36:17,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-23 05:36:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-23 05:36:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:36:17,319 INFO L87 Difference]: Start difference. First operand 619 states and 697 transitions. Second operand has 36 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 36 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 05:36:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:18,156 INFO L93 Difference]: Finished difference Result 673 states and 742 transitions. [2022-07-23 05:36:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 05:36:18,157 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 36 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 68 [2022-07-23 05:36:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:18,159 INFO L225 Difference]: With dead ends: 673 [2022-07-23 05:36:18,159 INFO L226 Difference]: Without dead ends: 673 [2022-07-23 05:36:18,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=2393, Unknown=0, NotChecked=0, Total=2970 [2022-07-23 05:36:18,159 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 425 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:18,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 509 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:36:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-23 05:36:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 632. [2022-07-23 05:36:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 629 states have (on average 1.1287758346581875) internal successors, (710), 631 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 710 transitions. [2022-07-23 05:36:18,167 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 710 transitions. Word has length 68 [2022-07-23 05:36:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:18,168 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 710 transitions. [2022-07-23 05:36:18,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 36 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 05:36:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 710 transitions. [2022-07-23 05:36:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-23 05:36:18,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:18,169 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:18,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-23 05:36:18,376 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,SelfDestructingSolverStorable62 [2022-07-23 05:36:18,376 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -270160718, now seen corresponding path program 11 times [2022-07-23 05:36:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488994352] [2022-07-23 05:36:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 123 proven. 139 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:18,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:18,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488994352] [2022-07-23 05:36:18,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488994352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226536424] [2022-07-23 05:36:18,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:18,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:18,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:18,672 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:18,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-23 05:36:18,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-23 05:36:18,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-23 05:36:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:18,866 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:18,866 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 05:36:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 138 proven. 120 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:19,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 138 proven. 120 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:19,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226536424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:19,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:19,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 57 [2022-07-23 05:36:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54367354] [2022-07-23 05:36:19,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:19,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-23 05:36:19,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-23 05:36:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=2660, Unknown=0, NotChecked=0, Total=3192 [2022-07-23 05:36:19,825 INFO L87 Difference]: Start difference. First operand 632 states and 710 transitions. Second operand has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:21,847 INFO L93 Difference]: Finished difference Result 1565 states and 1688 transitions. [2022-07-23 05:36:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-23 05:36:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-23 05:36:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:21,850 INFO L225 Difference]: With dead ends: 1565 [2022-07-23 05:36:21,850 INFO L226 Difference]: Without dead ends: 1518 [2022-07-23 05:36:21,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3115, Invalid=9767, Unknown=0, NotChecked=0, Total=12882 [2022-07-23 05:36:21,851 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 720 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:21,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 494 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:36:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-07-23 05:36:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 697. [2022-07-23 05:36:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 694 states have (on average 1.1340057636887608) internal successors, (787), 696 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 787 transitions. [2022-07-23 05:36:21,859 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 787 transitions. Word has length 69 [2022-07-23 05:36:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:21,859 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 787 transitions. [2022-07-23 05:36:21,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 787 transitions. [2022-07-23 05:36:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-23 05:36:21,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:21,861 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:21,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:22,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-23 05:36:22,078 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:22,078 INFO L85 PathProgramCache]: Analyzing trace with hash -74626530, now seen corresponding path program 11 times [2022-07-23 05:36:22,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:22,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58388433] [2022-07-23 05:36:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:22,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58388433] [2022-07-23 05:36:22,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58388433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463166768] [2022-07-23 05:36:22,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:22,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:22,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:22,283 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:22,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-23 05:36:22,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-23 05:36:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-23 05:36:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:22,470 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:22,470 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 05:36:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:22,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 91 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:36:23,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463166768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:23,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:23,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 56 [2022-07-23 05:36:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239710851] [2022-07-23 05:36:23,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:23,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-23 05:36:23,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-23 05:36:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2842, Unknown=0, NotChecked=0, Total=3192 [2022-07-23 05:36:23,564 INFO L87 Difference]: Start difference. First operand 697 states and 787 transitions. Second operand has 57 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 57 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:24,871 INFO L93 Difference]: Finished difference Result 1020 states and 1122 transitions. [2022-07-23 05:36:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-23 05:36:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 57 states have internal predecessors, (191), 0 states have call successors, (0), 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 71 [2022-07-23 05:36:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:24,873 INFO L225 Difference]: With dead ends: 1020 [2022-07-23 05:36:24,873 INFO L226 Difference]: Without dead ends: 1005 [2022-07-23 05:36:24,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1497, Invalid=5985, Unknown=0, NotChecked=0, Total=7482 [2022-07-23 05:36:24,874 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 258 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:24,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 594 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:36:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-07-23 05:36:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 721. [2022-07-23 05:36:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 718 states have (on average 1.1253481894150419) internal successors, (808), 720 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 05:36:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 808 transitions. [2022-07-23 05:36:24,881 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 808 transitions. Word has length 71 [2022-07-23 05:36:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:24,881 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 808 transitions. [2022-07-23 05:36:24,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 57 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 808 transitions. [2022-07-23 05:36:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-23 05:36:24,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:24,882 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:24,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-23 05:36:25,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-23 05:36:25,088 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1627104823, now seen corresponding path program 10 times [2022-07-23 05:36:25,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175328962] [2022-07-23 05:36:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 19 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175328962] [2022-07-23 05:36:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175328962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646046011] [2022-07-23 05:36:25,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:25,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:25,838 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:25,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-23 05:36:25,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:25,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:25,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-23 05:36:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:25,999 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:25,999 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 05:36:26,004 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 05:36:26,316 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 05:36:26,355 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 05:36:26,495 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 18 treesize of output 20 [2022-07-23 05:36:26,594 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 18 treesize of output 20 [2022-07-23 05:36:26,696 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 18 treesize of output 20 [2022-07-23 05:36:26,786 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 18 treesize of output 20 [2022-07-23 05:36:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:26,883 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 21 treesize of output 7 [2022-07-23 05:36:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-23 05:36:26,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:28,308 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:28,308 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 05:36:28,314 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:28,314 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 05:36:28,317 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 05:36:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 60 refuted. 9 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-23 05:36:29,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646046011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:29,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:29,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21, 22] total 74 [2022-07-23 05:36:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215983050] [2022-07-23 05:36:29,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:29,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-23 05:36:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-23 05:36:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=4990, Unknown=29, NotChecked=0, Total=5402 [2022-07-23 05:36:29,351 INFO L87 Difference]: Start difference. First operand 721 states and 808 transitions. Second operand has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:42,735 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (or (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse0)) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse0))))) (not (<= 0 |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse1)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse2 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse2)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse2)))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse3)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse3))))) is different from false [2022-07-23 05:36:43,915 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (or (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse0)) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse0))))) (not (<= 0 |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse1)))) (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (not (<= (+ |c_ULTIMATE.start_cstrcat_#t~post5#1.offset| 1) (select |c_#length| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|))) (and (<= 0 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse2 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse2)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse2)))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse3)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse3))))) is different from false [2022-07-23 05:36:45,045 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (and (<= 0 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|)))) (.cse2 (<= (+ |c_ULTIMATE.start_cstrcat_#t~post5#1.offset| 1) (select |c_#length| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|)))) (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (or (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0) .cse0) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse1)))) (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (not .cse2) .cse0) .cse2 (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse3)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse3)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (let ((.cse4 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse4)) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse4)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (let ((.cse5 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse5)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse5)))) (<= 0 |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|))) is different from false [2022-07-23 05:36:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:45,261 INFO L93 Difference]: Finished difference Result 1101 states and 1217 transitions. [2022-07-23 05:36:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-07-23 05:36:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 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 72 [2022-07-23 05:36:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:45,263 INFO L225 Difference]: With dead ends: 1101 [2022-07-23 05:36:45,263 INFO L226 Difference]: Without dead ends: 966 [2022-07-23 05:36:45,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11018 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=3306, Invalid=34261, Unknown=275, NotChecked=1164, Total=39006 [2022-07-23 05:36:45,265 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1314 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 4586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1018 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:45,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 1087 Invalid, 4586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 3022 Invalid, 0 Unknown, 1018 Unchecked, 1.4s Time] [2022-07-23 05:36:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-07-23 05:36:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 889. [2022-07-23 05:36:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 886 states have (on average 1.1264108352144468) internal successors, (998), 888 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 998 transitions. [2022-07-23 05:36:45,272 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 998 transitions. Word has length 72 [2022-07-23 05:36:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:45,273 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 998 transitions. [2022-07-23 05:36:45,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 998 transitions. [2022-07-23 05:36:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:45,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:45,274 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:45,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:45,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:45,494 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash -528754417, now seen corresponding path program 12 times [2022-07-23 05:36:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:45,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813844215] [2022-07-23 05:36:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 123 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:45,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813844215] [2022-07-23 05:36:45,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813844215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132994794] [2022-07-23 05:36:45,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:36:45,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:45,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:45,735 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:45,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-23 05:36:45,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-23 05:36:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 05:36:45,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:45,953 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:45,953 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 05:36:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 144 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:46,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 144 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:36:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132994794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:46,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:46,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 63 [2022-07-23 05:36:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350351393] [2022-07-23 05:36:46,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-23 05:36:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-23 05:36:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=3152, Unknown=0, NotChecked=0, Total=3906 [2022-07-23 05:36:46,988 INFO L87 Difference]: Start difference. First operand 889 states and 998 transitions. Second operand has 63 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 63 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:49,589 INFO L93 Difference]: Finished difference Result 2943 states and 3180 transitions. [2022-07-23 05:36:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-23 05:36:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 63 states have internal predecessors, (185), 0 states have call successors, (0), 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 73 [2022-07-23 05:36:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:49,597 INFO L225 Difference]: With dead ends: 2943 [2022-07-23 05:36:49,597 INFO L226 Difference]: Without dead ends: 2835 [2022-07-23 05:36:49,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5171 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5257, Invalid=14765, Unknown=0, NotChecked=0, Total=20022 [2022-07-23 05:36:49,598 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 830 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:49,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 551 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:36:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-23 05:36:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1073. [2022-07-23 05:36:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1070 states have (on average 1.1364485981308412) internal successors, (1216), 1072 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1216 transitions. [2022-07-23 05:36:49,617 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1216 transitions. Word has length 73 [2022-07-23 05:36:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:49,617 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1216 transitions. [2022-07-23 05:36:49,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 63 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1216 transitions. [2022-07-23 05:36:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:49,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:49,619 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:49,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-23 05:36:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:49,824 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1523917955, now seen corresponding path program 12 times [2022-07-23 05:36:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:49,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757495729] [2022-07-23 05:36:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-23 05:36:50,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:50,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757495729] [2022-07-23 05:36:50,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757495729] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:50,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244016230] [2022-07-23 05:36:50,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:36:50,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:50,264 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:50,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-23 05:36:50,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-23 05:36:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:36:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:50,882 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 05:36:50,915 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 05:36:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-23 05:36:50,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:50,933 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 13 treesize of output 11 [2022-07-23 05:36:50,934 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 20 treesize of output 18 [2022-07-23 05:36:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-23 05:36:51,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244016230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:51,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:51,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-07-23 05:36:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957180040] [2022-07-23 05:36:51,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:51,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-23 05:36:51,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-23 05:36:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 05:36:51,323 INFO L87 Difference]: Start difference. First operand 1073 states and 1216 transitions. Second operand has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:52,801 INFO L93 Difference]: Finished difference Result 1169 states and 1305 transitions. [2022-07-23 05:36:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-23 05:36:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 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 73 [2022-07-23 05:36:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:52,804 INFO L225 Difference]: With dead ends: 1169 [2022-07-23 05:36:52,804 INFO L226 Difference]: Without dead ends: 1159 [2022-07-23 05:36:52,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1661, Invalid=4501, Unknown=0, NotChecked=0, Total=6162 [2022-07-23 05:36:52,805 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 471 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:52,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 503 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:36:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-07-23 05:36:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1055. [2022-07-23 05:36:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1052 states have (on average 1.1359315589353611) internal successors, (1195), 1054 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1195 transitions. [2022-07-23 05:36:52,817 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1195 transitions. Word has length 73 [2022-07-23 05:36:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:52,817 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1195 transitions. [2022-07-23 05:36:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1195 transitions. [2022-07-23 05:36:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:52,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:52,830 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:52,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:53,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-23 05:36:53,031 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1397249283, now seen corresponding path program 13 times [2022-07-23 05:36:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:53,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419284549] [2022-07-23 05:36:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:53,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:36:53,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419284549] [2022-07-23 05:36:53,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419284549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727402685] [2022-07-23 05:36:53,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:36:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:53,779 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:53,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-23 05:36:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:36:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:54,425 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 05:36:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:54,684 INFO L356 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-07-23 05:36:54,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 31 [2022-07-23 05:36:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:36:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:54,814 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 44 treesize of output 38 [2022-07-23 05:36:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:54,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2022-07-23 05:36:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 33 proven. 66 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:36:55,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727402685] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:55,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:55,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 58 [2022-07-23 05:36:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948779389] [2022-07-23 05:36:55,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:55,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-23 05:36:55,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-23 05:36:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2899, Unknown=0, NotChecked=0, Total=3306 [2022-07-23 05:36:55,459 INFO L87 Difference]: Start difference. First operand 1055 states and 1195 transitions. Second operand has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:56,974 INFO L93 Difference]: Finished difference Result 1085 states and 1217 transitions. [2022-07-23 05:36:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:36:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-23 05:36:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:56,976 INFO L225 Difference]: With dead ends: 1085 [2022-07-23 05:36:56,976 INFO L226 Difference]: Without dead ends: 1067 [2022-07-23 05:36:56,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=880, Invalid=5440, Unknown=0, NotChecked=0, Total=6320 [2022-07-23 05:36:56,977 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 525 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:56,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 711 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 869 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2022-07-23 05:36:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-07-23 05:36:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1025. [2022-07-23 05:36:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1022 states have (on average 1.1350293542074363) internal successors, (1160), 1024 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1160 transitions. [2022-07-23 05:36:56,984 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1160 transitions. Word has length 73 [2022-07-23 05:36:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:56,984 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1160 transitions. [2022-07-23 05:36:56,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1160 transitions. [2022-07-23 05:36:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:56,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:56,985 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:57,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-23 05:36:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-23 05:36:57,186 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:36:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1443085943, now seen corresponding path program 14 times [2022-07-23 05:36:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:57,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345498588] [2022-07-23 05:36:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 20 proven. 117 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:57,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:57,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345498588] [2022-07-23 05:36:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345498588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:57,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101218220] [2022-07-23 05:36:57,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:36:57,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:57,997 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:57,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-23 05:36:58,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:36:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-23 05:36:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:58,156 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:58,156 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 05:36:58,368 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 05:36:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:58,916 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-07-23 05:36:58,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 62 [2022-07-23 05:36:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-23 05:36:59,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:00,086 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 74 treesize of output 64 [2022-07-23 05:37:00,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:00,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-07-23 05:37:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-23 05:37:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101218220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:00,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:00,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 21] total 67 [2022-07-23 05:37:00,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785765236] [2022-07-23 05:37:00,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:00,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-23 05:37:00,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-23 05:37:00,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=4086, Unknown=0, NotChecked=0, Total=4422 [2022-07-23 05:37:00,772 INFO L87 Difference]: Start difference. First operand 1025 states and 1160 transitions. Second operand has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:05,561 INFO L93 Difference]: Finished difference Result 1305 states and 1455 transitions. [2022-07-23 05:37:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-23 05:37:05,561 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 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 73 [2022-07-23 05:37:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:05,564 INFO L225 Difference]: With dead ends: 1305 [2022-07-23 05:37:05,564 INFO L226 Difference]: Without dead ends: 1065 [2022-07-23 05:37:05,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1213, Invalid=14789, Unknown=0, NotChecked=0, Total=16002 [2022-07-23 05:37:05,565 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 243 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:05,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 852 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2479 Invalid, 0 Unknown, 294 Unchecked, 1.2s Time] [2022-07-23 05:37:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-07-23 05:37:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 899. [2022-07-23 05:37:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 896 states have (on average 1.1194196428571428) internal successors, (1003), 898 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1003 transitions. [2022-07-23 05:37:05,574 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1003 transitions. Word has length 73 [2022-07-23 05:37:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:05,574 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1003 transitions. [2022-07-23 05:37:05,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1003 transitions. [2022-07-23 05:37:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 05:37:05,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:05,576 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:05,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:05,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-23 05:37:05,780 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:37:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1581183415, now seen corresponding path program 13 times [2022-07-23 05:37:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:05,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88244852] [2022-07-23 05:37:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:05,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 123 proven. 251 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:08,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88244852] [2022-07-23 05:37:08,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88244852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285881124] [2022-07-23 05:37:08,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:37:08,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:08,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:08,342 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:37:08,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-23 05:37:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-23 05:37:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:09,427 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 05:37:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:12,228 INFO L356 Elim1Store]: treesize reduction 69, result has 51.4 percent of original size [2022-07-23 05:37:12,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 55 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 119 [2022-07-23 05:37:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 33 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:12,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:12,928 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 164 treesize of output 142 [2022-07-23 05:37:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:12,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 228 [2022-07-23 05:37:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 143 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:14,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285881124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:14,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:14,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 98 [2022-07-23 05:37:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656256633] [2022-07-23 05:37:14,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-23 05:37:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:14,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-23 05:37:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=8593, Unknown=0, NotChecked=0, Total=9506 [2022-07-23 05:37:14,916 INFO L87 Difference]: Start difference. First operand 899 states and 1003 transitions. Second operand has 98 states, 98 states have (on average 2.142857142857143) internal successors, (210), 98 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:17,883 INFO L93 Difference]: Finished difference Result 1239 states and 1384 transitions. [2022-07-23 05:37:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-23 05:37:17,884 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.142857142857143) internal successors, (210), 98 states have internal predecessors, (210), 0 states have call successors, (0), 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 81 [2022-07-23 05:37:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:17,886 INFO L225 Difference]: With dead ends: 1239 [2022-07-23 05:37:17,886 INFO L226 Difference]: Without dead ends: 1159 [2022-07-23 05:37:17,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6503 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2432, Invalid=18738, Unknown=0, NotChecked=0, Total=21170 [2022-07-23 05:37:17,887 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 515 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:17,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 402 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 733 Invalid, 0 Unknown, 225 Unchecked, 0.5s Time] [2022-07-23 05:37:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-07-23 05:37:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 923. [2022-07-23 05:37:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 920 states have (on average 1.1195652173913044) internal successors, (1030), 922 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1030 transitions. [2022-07-23 05:37:17,893 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1030 transitions. Word has length 81 [2022-07-23 05:37:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:17,893 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1030 transitions. [2022-07-23 05:37:17,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.142857142857143) internal successors, (210), 98 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1030 transitions. [2022-07-23 05:37:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 05:37:17,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:17,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:17,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:18,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:18,094 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:37:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2054527358, now seen corresponding path program 4 times [2022-07-23 05:37:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531724278] [2022-07-23 05:37:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-23 05:37:18,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:18,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531724278] [2022-07-23 05:37:18,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531724278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:18,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740330627] [2022-07-23 05:37:18,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:37:18,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:18,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:18,293 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:37:18,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-23 05:37:18,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:37:18,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-23 05:37:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:18,491 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:18,491 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 05:37:18,503 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 05:37:18,776 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 13 treesize of output 9 [2022-07-23 05:37:19,284 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 05:37:19,328 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 24 [2022-07-23 05:37:19,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-07-23 05:37:19,664 INFO L356 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2022-07-23 05:37:19,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2022-07-23 05:37:19,789 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 05:37:19,920 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 05:37:20,048 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 05:37:20,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:20,162 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:20,163 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 18 treesize of output 10 [2022-07-23 05:37:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 42 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:20,264 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-23 05:37:20,269 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,274 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2510 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,280 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,284 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2509 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2509) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,290 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,295 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2508 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2508) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,300 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-23 05:37:20,307 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrcat_#t~mem2#1| 0) (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0))) is different from false [2022-07-23 05:37:20,434 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_cstrcat_~s~0#1.offset_421| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0) |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|) 0))) (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2511) |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 05:37:20,440 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:20,440 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 48 treesize of output 37 [2022-07-23 05:37:20,445 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:20,446 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 50 treesize of output 52 [2022-07-23 05:37:20,449 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 05:37:20,472 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 20 treesize of output 18 [2022-07-23 05:37:20,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:20,487 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 54 treesize of output 77 [2022-07-23 05:37:24,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:24,533 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 05:37:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 55 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 41 not checked. [2022-07-23 05:37:24,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740330627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:24,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:24,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 32] total 75 [2022-07-23 05:37:24,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243299044] [2022-07-23 05:37:24,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-23 05:37:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-23 05:37:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3803, Unknown=26, NotChecked=1350, Total=5550 [2022-07-23 05:37:24,557 INFO L87 Difference]: Start difference. First operand 923 states and 1030 transitions. Second operand has 75 states, 75 states have (on average 2.8266666666666667) internal successors, (212), 75 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:27,866 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2508 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2508) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (= |c_ULTIMATE.start_cstrcat_#t~post5#1.offset| 0) (<= (+ |c_ULTIMATE.start_cstrcat_#t~post5#1.offset| 1) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (= |c_ULTIMATE.start_cstrcat_~s2#1.base| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) (<= (+ 5 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (+ (select |c_#length| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|))) is different from false [2022-07-23 05:37:27,933 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2508 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2508) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 5 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-23 05:37:28,001 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 5 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-23 05:37:28,070 WARN L833 $PredicateComparison]: unable to prove that (and (<= 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|)) (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2509 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2509) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0))) is different from false [2022-07-23 05:37:28,151 WARN L833 $PredicateComparison]: unable to prove that (and (<= 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-23 05:37:28,214 WARN L833 $PredicateComparison]: unable to prove that (and (<= 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2510 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-23 05:37:28,283 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-23 05:37:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:28,682 INFO L93 Difference]: Finished difference Result 993 states and 1094 transitions. [2022-07-23 05:37:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-23 05:37:28,682 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.8266666666666667) internal successors, (212), 75 states have internal predecessors, (212), 0 states have call successors, (0), 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 82 [2022-07-23 05:37:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:28,685 INFO L225 Difference]: With dead ends: 993 [2022-07-23 05:37:28,685 INFO L226 Difference]: Without dead ends: 949 [2022-07-23 05:37:28,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 17 IntricatePredicates, 1 DeprecatedPredicates, 3165 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1518, Invalid=12291, Unknown=65, NotChecked=4216, Total=18090 [2022-07-23 05:37:28,686 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 279 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1997 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:28,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1253 Invalid, 3714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1655 Invalid, 0 Unknown, 1997 Unchecked, 0.8s Time] [2022-07-23 05:37:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-07-23 05:37:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 923. [2022-07-23 05:37:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 920 states have (on average 1.117391304347826) internal successors, (1028), 922 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1028 transitions. [2022-07-23 05:37:28,694 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1028 transitions. Word has length 82 [2022-07-23 05:37:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:28,695 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1028 transitions. [2022-07-23 05:37:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.8266666666666667) internal successors, (212), 75 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1028 transitions. [2022-07-23 05:37:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-23 05:37:28,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:28,696 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:28,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:28,897 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:37:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1945200858, now seen corresponding path program 14 times [2022-07-23 05:37:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:28,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996504529] [2022-07-23 05:37:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:29,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:29,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996504529] [2022-07-23 05:37:29,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996504529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:29,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874172587] [2022-07-23 05:37:29,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:29,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:29,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:29,387 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:37:29,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-23 05:37:29,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-23 05:37:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:29,563 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:29,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 05:37:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:30,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874172587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:31,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:31,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2022-07-23 05:37:31,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946100903] [2022-07-23 05:37:31,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:31,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-23 05:37:31,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-23 05:37:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=6244, Unknown=0, NotChecked=0, Total=7140 [2022-07-23 05:37:31,461 INFO L87 Difference]: Start difference. First operand 923 states and 1028 transitions. Second operand has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:33,445 INFO L93 Difference]: Finished difference Result 2224 states and 2401 transitions. [2022-07-23 05:37:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 05:37:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 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 85 [2022-07-23 05:37:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:33,452 INFO L225 Difference]: With dead ends: 2224 [2022-07-23 05:37:33,452 INFO L226 Difference]: Without dead ends: 2224 [2022-07-23 05:37:33,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2297, Invalid=9913, Unknown=0, NotChecked=0, Total=12210 [2022-07-23 05:37:33,453 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 600 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 3071 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 3071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:33,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 1162 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 3071 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-23 05:37:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2022-07-23 05:37:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 935. [2022-07-23 05:37:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 932 states have (on average 1.121244635193133) internal successors, (1045), 934 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1045 transitions. [2022-07-23 05:37:33,466 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1045 transitions. Word has length 85 [2022-07-23 05:37:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:33,466 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1045 transitions. [2022-07-23 05:37:33,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1045 transitions. [2022-07-23 05:37:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-23 05:37:33,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:33,468 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:33,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-23 05:37:33,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:33,675 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:37:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1909828783, now seen corresponding path program 15 times [2022-07-23 05:37:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:33,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552013499] [2022-07-23 05:37:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-23 05:37:34,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:34,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552013499] [2022-07-23 05:37:34,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552013499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:34,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849387724] [2022-07-23 05:37:34,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:37:34,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:34,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:34,311 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:37:34,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-23 05:37:34,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 05:37:34,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-23 05:37:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:34,644 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:34,645 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 05:37:34,981 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 05:37:37,419 INFO L356 Elim1Store]: treesize reduction 5, result has 91.4 percent of original size [2022-07-23 05:37:37,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 67 [2022-07-23 05:37:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 68 refuted. 1 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-23 05:37:37,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:38,739 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 40 treesize of output 34 [2022-07-23 05:37:38,752 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:38,752 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 58 treesize of output 76 [2022-07-23 05:37:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-23 05:37:39,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849387724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:39,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:39,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 64 [2022-07-23 05:37:39,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362533257] [2022-07-23 05:37:39,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:39,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-23 05:37:39,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-23 05:37:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=3688, Unknown=1, NotChecked=0, Total=4032 [2022-07-23 05:37:39,537 INFO L87 Difference]: Start difference. First operand 935 states and 1045 transitions. Second operand has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 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 05:37:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:45,354 INFO L93 Difference]: Finished difference Result 1080 states and 1189 transitions. [2022-07-23 05:37:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-23 05:37:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 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 85 [2022-07-23 05:37:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:45,356 INFO L225 Difference]: With dead ends: 1080 [2022-07-23 05:37:45,356 INFO L226 Difference]: Without dead ends: 1033 [2022-07-23 05:37:45,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1364, Invalid=13397, Unknown=1, NotChecked=0, Total=14762 [2022-07-23 05:37:45,357 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 374 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:45,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 925 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2394 Invalid, 0 Unknown, 384 Unchecked, 1.1s Time] [2022-07-23 05:37:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-07-23 05:37:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 934. [2022-07-23 05:37:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 931 states have (on average 1.1117078410311494) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2022-07-23 05:37:45,367 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 85 [2022-07-23 05:37:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:45,367 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2022-07-23 05:37:45,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 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 05:37:45,368 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2022-07-23 05:37:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-23 05:37:45,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:45,369 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:45,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-07-23 05:37:45,580 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:37:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1027250177, now seen corresponding path program 15 times [2022-07-23 05:37:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:45,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013929763] [2022-07-23 05:37:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:47,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013929763] [2022-07-23 05:37:47,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013929763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515908294] [2022-07-23 05:37:47,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:37:47,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:47,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:47,925 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:37:47,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-23 05:37:48,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-23 05:37:48,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:48,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-23 05:37:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:48,945 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 05:37:51,328 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:51,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 51 [2022-07-23 05:37:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 36 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:51,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:51,899 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 179 treesize of output 155 [2022-07-23 05:37:51,934 INFO L356 Elim1Store]: treesize reduction 770, result has 0.1 percent of original size [2022-07-23 05:37:51,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 295 treesize of output 249 [2022-07-23 05:37:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 168 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:54,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515908294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:54,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:54,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 97 [2022-07-23 05:37:54,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793969847] [2022-07-23 05:37:54,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:54,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-23 05:37:54,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-23 05:37:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=8381, Unknown=0, NotChecked=0, Total=9312 [2022-07-23 05:37:54,533 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 97 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 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 05:38:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:38:33,854 INFO L93 Difference]: Finished difference Result 2362 states and 2533 transitions. [2022-07-23 05:38:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-07-23 05:38:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 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) Word has length 87 [2022-07-23 05:38:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:38:33,857 INFO L225 Difference]: With dead ends: 2362 [2022-07-23 05:38:33,857 INFO L226 Difference]: Without dead ends: 2335 [2022-07-23 05:38:33,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33139 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=11325, Invalid=86331, Unknown=0, NotChecked=0, Total=97656 [2022-07-23 05:38:33,861 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1434 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 9033 mSolverCounterSat, 1467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 10500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1467 IncrementalHoareTripleChecker+Valid, 9033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:38:33,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 1472 Invalid, 10500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1467 Valid, 9033 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-23 05:38:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2022-07-23 05:38:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1093. [2022-07-23 05:38:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1090 states have (on average 1.114678899082569) internal successors, (1215), 1092 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:38:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1215 transitions. [2022-07-23 05:38:33,897 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1215 transitions. Word has length 87 [2022-07-23 05:38:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:38:33,897 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1215 transitions. [2022-07-23 05:38:33,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 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 05:38:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1215 transitions. [2022-07-23 05:38:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 05:38:33,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:38:33,899 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:38:33,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-23 05:38:34,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-23 05:38:34,103 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-23 05:38:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:38:34,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1165127411, now seen corresponding path program 5 times [2022-07-23 05:38:34,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:38:34,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476545969] [2022-07-23 05:38:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:38:34,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:38:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:38:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 195 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 05:38:34,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:38:34,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476545969] [2022-07-23 05:38:34,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476545969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:38:34,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632592242] [2022-07-23 05:38:34,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:38:34,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:38:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:38:34,940 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:38:34,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-23 05:38:35,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-23 05:38:35,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:38:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 147 conjunts are in the unsatisfiable core [2022-07-23 05:38:35,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:38:35,687 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