./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.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 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 07:00:30,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 07:00:30,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 07:00:30,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 07:00:30,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 07:00:30,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 07:00:30,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 07:00:30,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 07:00:30,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 07:00:30,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 07:00:30,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 07:00:30,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 07:00:30,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 07:00:30,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 07:00:30,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 07:00:30,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 07:00:30,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 07:00:30,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 07:00:30,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 07:00:30,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 07:00:30,619 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 07:00:30,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 07:00:30,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 07:00:30,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 07:00:30,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 07:00:30,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 07:00:30,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 07:00:30,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 07:00:30,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 07:00:30,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 07:00:30,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 07:00:30,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 07:00:30,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 07:00:30,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 07:00:30,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 07:00:30,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 07:00:30,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 07:00:30,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 07:00:30,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 07:00:30,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 07:00:30,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 07:00:30,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 07:00:30,641 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 07:00:30,658 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 07:00:30,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 07:00:30,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 07:00:30,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 07:00:30,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 07:00:30,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 07:00:30,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 07:00:30,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 07:00:30,665 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 07:00:30,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 07:00:30,666 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 07:00:30,666 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 07:00:30,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 07:00:30,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 07:00:30,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 07:00:30,666 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 07:00:30,667 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 07:00:30,667 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 07:00:30,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 07:00:30,667 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 07:00:30,667 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 07:00:30,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 07:00:30,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 07:00:30,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 07:00:30,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 07:00:30,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:00:30,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 07:00:30,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 07:00:30,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 07:00:30,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 07:00:30,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa [2022-07-14 07:00:30,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 07:00:30,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 07:00:30,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 07:00:30,896 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 07:00:30,898 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 07:00:30,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2022-07-14 07:00:30,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed41ec46/97f6c6cf7cf146bd9712a12b91716313/FLAG0f0c52206 [2022-07-14 07:00:31,414 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 07:00:31,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2022-07-14 07:00:31,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed41ec46/97f6c6cf7cf146bd9712a12b91716313/FLAG0f0c52206 [2022-07-14 07:00:31,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed41ec46/97f6c6cf7cf146bd9712a12b91716313 [2022-07-14 07:00:31,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 07:00:31,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 07:00:31,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 07:00:31,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 07:00:31,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 07:00:31,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:00:31" (1/1) ... [2022-07-14 07:00:31,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f637d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:31, skipping insertion in model container [2022-07-14 07:00:31,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:00:31" (1/1) ... [2022-07-14 07:00:31,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 07:00:31,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:00:32,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i[24175,24188] [2022-07-14 07:00:32,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:00:32,023 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 07:00:32,054 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i[24175,24188] [2022-07-14 07:00:32,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:00:32,072 INFO L208 MainTranslator]: Completed translation [2022-07-14 07:00:32,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32 WrapperNode [2022-07-14 07:00:32,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 07:00:32,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 07:00:32,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 07:00:32,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 07:00:32,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,110 INFO L137 Inliner]: procedures = 122, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-07-14 07:00:32,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 07:00:32,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 07:00:32,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 07:00:32,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 07:00:32,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 07:00:32,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 07:00:32,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 07:00:32,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 07:00:32,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (1/1) ... [2022-07-14 07:00:32,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:00:32,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:32,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 07:00:32,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 07:00:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-14 07:00:32,207 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-14 07:00:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 07:00:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 07:00:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 07:00:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 07:00:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 07:00:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 07:00:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 07:00:32,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 07:00:32,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 07:00:32,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 07:00:32,304 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 07:00:32,313 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 07:00:32,360 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-14 07:00:32,555 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 07:00:32,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 07:00:32,560 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 07:00:32,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:00:32 BoogieIcfgContainer [2022-07-14 07:00:32,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 07:00:32,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 07:00:32,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 07:00:32,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 07:00:32,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 07:00:31" (1/3) ... [2022-07-14 07:00:32,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1240fbd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:00:32, skipping insertion in model container [2022-07-14 07:00:32,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:32" (2/3) ... [2022-07-14 07:00:32,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1240fbd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:00:32, skipping insertion in model container [2022-07-14 07:00:32,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:00:32" (3/3) ... [2022-07-14 07:00:32,579 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-1.i [2022-07-14 07:00:32,589 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 07:00:32,590 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-07-14 07:00:32,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 07:00:32,639 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@24fb29c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3981fa1f [2022-07-14 07:00:32,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-07-14 07:00:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 07:00:32,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:32,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 07:00:32,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1079622, now seen corresponding path program 1 times [2022-07-14 07:00:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:32,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768941356] [2022-07-14 07:00:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:32,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768941356] [2022-07-14 07:00:32,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768941356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:32,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:32,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:00:32,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961994067] [2022-07-14 07:00:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:32,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:32,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:32,840 INFO L87 Difference]: Start difference. First operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:32,938 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-07-14 07:00:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-14 07:00:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:32,946 INFO L225 Difference]: With dead ends: 91 [2022-07-14 07:00:32,947 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 07:00:32,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:32,969 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:32,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 07:00:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2022-07-14 07:00:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.864864864864865) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-14 07:00:33,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 4 [2022-07-14 07:00:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,002 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-14 07:00:33,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-14 07:00:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 07:00:33,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 07:00:33,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 07:00:33,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623, now seen corresponding path program 1 times [2022-07-14 07:00:33,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94583582] [2022-07-14 07:00:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94583582] [2022-07-14 07:00:33,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94583582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:33,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:33,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:00:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875908854] [2022-07-14 07:00:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:33,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:33,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:33,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,070 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,120 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-07-14 07:00:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:33,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-14 07:00:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,123 INFO L225 Difference]: With dead ends: 61 [2022-07-14 07:00:33,123 INFO L226 Difference]: Without dead ends: 61 [2022-07-14 07:00:33,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,126 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:33,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-14 07:00:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-14 07:00:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 60 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) [2022-07-14 07:00:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-07-14 07:00:33,135 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 4 [2022-07-14 07:00:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,136 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-07-14 07:00:33,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-07-14 07:00:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 07:00:33,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 07:00:33,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,142 INFO L85 PathProgramCache]: Analyzing trace with hash -401980428, now seen corresponding path program 1 times [2022-07-14 07:00:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983547288] [2022-07-14 07:00:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983547288] [2022-07-14 07:00:33,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983547288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:33,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:33,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:00:33,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270079107] [2022-07-14 07:00:33,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:33,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:33,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:33,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,192 INFO L87 Difference]: Start difference. First operand 61 states and 65 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) [2022-07-14 07:00:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,258 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-07-14 07:00:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:33,259 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 [2022-07-14 07:00:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,259 INFO L225 Difference]: With dead ends: 100 [2022-07-14 07:00:33,259 INFO L226 Difference]: Without dead ends: 100 [2022-07-14 07:00:33,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,260 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:33,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 110 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-14 07:00:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 59. [2022-07-14 07:00:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-07-14 07:00:33,273 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 10 [2022-07-14 07:00:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,273 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-07-14 07:00:33,273 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) [2022-07-14 07:00:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-07-14 07:00:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 07:00:33,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 07:00:33,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash -401980427, now seen corresponding path program 1 times [2022-07-14 07:00:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749794561] [2022-07-14 07:00:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749794561] [2022-07-14 07:00:33,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749794561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:33,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:33,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:00:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767064166] [2022-07-14 07:00:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:33,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:33,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,322 INFO L87 Difference]: Start difference. First operand 59 states and 63 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) [2022-07-14 07:00:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,362 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-07-14 07:00:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:33,362 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 [2022-07-14 07:00:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,363 INFO L225 Difference]: With dead ends: 100 [2022-07-14 07:00:33,363 INFO L226 Difference]: Without dead ends: 100 [2022-07-14 07:00:33,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,364 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 52 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 119 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 [2022-07-14 07:00:33,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-14 07:00:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2022-07-14 07:00:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-14 07:00:33,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 10 [2022-07-14 07:00:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,368 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-14 07:00:33,368 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) [2022-07-14 07:00:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-14 07:00:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 07:00:33,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 07:00:33,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash -401981869, now seen corresponding path program 1 times [2022-07-14 07:00:33,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262958719] [2022-07-14 07:00:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262958719] [2022-07-14 07:00:33,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262958719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:33,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:00:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089114047] [2022-07-14 07:00:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,450 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) 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) [2022-07-14 07:00:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,455 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-07-14 07:00:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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 [2022-07-14 07:00:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,456 INFO L225 Difference]: With dead ends: 65 [2022-07-14 07:00:33,456 INFO L226 Difference]: Without dead ends: 65 [2022-07-14 07:00:33,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:33,462 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:33,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-14 07:00:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-07-14 07:00:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.631578947368421) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-07-14 07:00:33,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 10 [2022-07-14 07:00:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,466 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-07-14 07:00:33,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) 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) [2022-07-14 07:00:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-07-14 07:00:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 07:00:33,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 07:00:33,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash 243865783, now seen corresponding path program 1 times [2022-07-14 07:00:33,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576663022] [2022-07-14 07:00:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576663022] [2022-07-14 07:00:33,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576663022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:33,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:33,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:00:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922974035] [2022-07-14 07:00:33,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:00:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:00:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:33,567 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,668 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-07-14 07:00:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:00:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2022-07-14 07:00:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,670 INFO L225 Difference]: With dead ends: 81 [2022-07-14 07:00:33,670 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 07:00:33,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:00:33,674 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:33,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 74 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 07:00:33,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-07-14 07:00:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-07-14 07:00:33,700 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 12 [2022-07-14 07:00:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,701 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-07-14 07:00:33,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-07-14 07:00:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 07:00:33,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 07:00:33,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,702 INFO L85 PathProgramCache]: Analyzing trace with hash 243865784, now seen corresponding path program 1 times [2022-07-14 07:00:33,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365646062] [2022-07-14 07:00:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365646062] [2022-07-14 07:00:33,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365646062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:33,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:33,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 07:00:33,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835264035] [2022-07-14 07:00:33,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:33,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:00:33,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:00:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:00:33,788 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,883 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-07-14 07:00:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:00:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2022-07-14 07:00:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,884 INFO L225 Difference]: With dead ends: 81 [2022-07-14 07:00:33,885 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 07:00:33,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:00:33,885 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 140 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:33,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 58 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 07:00:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-07-14 07:00:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-07-14 07:00:33,888 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 12 [2022-07-14 07:00:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-07-14 07:00:33,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-07-14 07:00:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 07:00:33,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 07:00:33,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash -27720857, now seen corresponding path program 1 times [2022-07-14 07:00:33,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69904269] [2022-07-14 07:00:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69904269] [2022-07-14 07:00:33,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69904269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613355862] [2022-07-14 07:00:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:33,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:33,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:33,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 07:00:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 07:00:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:34,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:34,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613355862] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:34,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:34,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-14 07:00:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909787141] [2022-07-14 07:00:34,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:34,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 07:00:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 07:00:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:00:34,134 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:34,148 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-14 07:00:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 07:00:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 07:00:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:34,149 INFO L225 Difference]: With dead ends: 80 [2022-07-14 07:00:34,149 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 07:00:34,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:00:34,150 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:34,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 07:00:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-14 07:00:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.5) internal successors, (84), 75 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) [2022-07-14 07:00:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-07-14 07:00:34,153 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 16 [2022-07-14 07:00:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:34,153 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-07-14 07:00:34,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-07-14 07:00:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 07:00:34,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:34,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:34,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:34,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:34,377 INFO L85 PathProgramCache]: Analyzing trace with hash -868554549, now seen corresponding path program 1 times [2022-07-14 07:00:34,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:34,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550109870] [2022-07-14 07:00:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:34,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550109870] [2022-07-14 07:00:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550109870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052059850] [2022-07-14 07:00:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:34,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:34,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:34,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 07:00:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:34,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 07:00:34,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:34,558 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:34,606 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 07:00:34,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 07:00:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:34,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:34,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052059850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:34,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:34,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-14 07:00:34,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377992579] [2022-07-14 07:00:34,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:34,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 07:00:34,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:34,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 07:00:34,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:00:34,723 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:34,789 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-07-14 07:00:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:00:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 07:00:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:34,790 INFO L225 Difference]: With dead ends: 92 [2022-07-14 07:00:34,790 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 07:00:34,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:00:34,793 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:34,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 111 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-07-14 07:00:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 07:00:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2022-07-14 07:00:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-07-14 07:00:34,805 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 18 [2022-07-14 07:00:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:34,805 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-07-14 07:00:34,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-07-14 07:00:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 07:00:34,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:34,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:34,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:35,026 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,SelfDestructingSolverStorable8 [2022-07-14 07:00:35,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash -868554548, now seen corresponding path program 1 times [2022-07-14 07:00:35,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:35,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487269285] [2022-07-14 07:00:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487269285] [2022-07-14 07:00:35,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487269285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081791557] [2022-07-14 07:00:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:35,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:35,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:35,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 07:00:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 07:00:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:35,233 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:35,237 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:35,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 07:00:35,299 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:00:35,300 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 11 treesize of output 11 [2022-07-14 07:00:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:35,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081791557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:35,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-07-14 07:00:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951290447] [2022-07-14 07:00:35,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:35,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:00:35,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:00:35,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:00:35,489 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:35,658 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-07-14 07:00:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:00:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 07:00:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:35,659 INFO L225 Difference]: With dead ends: 90 [2022-07-14 07:00:35,659 INFO L226 Difference]: Without dead ends: 90 [2022-07-14 07:00:35,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-14 07:00:35,660 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 167 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:35,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 81 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-07-14 07:00:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-14 07:00:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2022-07-14 07:00:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-07-14 07:00:35,662 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 18 [2022-07-14 07:00:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:35,662 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-07-14 07:00:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-07-14 07:00:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 07:00:35,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:35,663 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:35,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:35,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:35,865 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash 140768543, now seen corresponding path program 1 times [2022-07-14 07:00:35,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323649253] [2022-07-14 07:00:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:35,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 07:00:35,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323649253] [2022-07-14 07:00:35,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323649253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:35,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:35,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 07:00:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725218306] [2022-07-14 07:00:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:00:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:00:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:00:35,944 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:36,032 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-07-14 07:00:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:00:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-14 07:00:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:36,034 INFO L225 Difference]: With dead ends: 88 [2022-07-14 07:00:36,034 INFO L226 Difference]: Without dead ends: 88 [2022-07-14 07:00:36,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:00:36,035 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:36,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 71 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-14 07:00:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2022-07-14 07:00:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-07-14 07:00:36,039 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 37 [2022-07-14 07:00:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:36,040 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-07-14 07:00:36,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-07-14 07:00:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 07:00:36,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:36,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:36,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 07:00:36,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 140768544, now seen corresponding path program 1 times [2022-07-14 07:00:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:36,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70523932] [2022-07-14 07:00:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 07:00:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70523932] [2022-07-14 07:00:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70523932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:36,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:36,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 07:00:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765078721] [2022-07-14 07:00:36,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:00:36,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:00:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:00:36,178 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:36,278 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-07-14 07:00:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 07:00:36,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 37 [2022-07-14 07:00:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:36,280 INFO L225 Difference]: With dead ends: 76 [2022-07-14 07:00:36,280 INFO L226 Difference]: Without dead ends: 76 [2022-07-14 07:00:36,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:00:36,281 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:36,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 50 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-14 07:00:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-14 07:00:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 71 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) [2022-07-14 07:00:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-07-14 07:00:36,283 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2022-07-14 07:00:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:36,284 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-07-14 07:00:36,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-07-14 07:00:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 07:00:36,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:36,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:36,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 07:00:36,285 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1747626123, now seen corresponding path program 1 times [2022-07-14 07:00:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719330591] [2022-07-14 07:00:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 07:00:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719330591] [2022-07-14 07:00:36,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719330591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534827754] [2022-07-14 07:00:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:36,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:36,580 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) [2022-07-14 07:00:36,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 07:00:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:36,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-14 07:00:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:36,850 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:36,914 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:00:36,914 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 11 treesize of output 11 [2022-07-14 07:00:36,968 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 [2022-07-14 07:00:37,014 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 [2022-07-14 07:00:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:37,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:37,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:37,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 07:00:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:00:37,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:37,834 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-14 07:00:38,930 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-14 07:00:38,940 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-14 07:00:38,958 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:38,958 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 39 treesize of output 32 [2022-07-14 07:00:38,984 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:38,984 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 218 treesize of output 214 [2022-07-14 07:00:38,992 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 248 treesize of output 234 [2022-07-14 07:00:39,056 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 64 treesize of output 60 [2022-07-14 07:00:39,270 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 39 treesize of output 33 [2022-07-14 07:00:39,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 07:00:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2022-07-14 07:00:39,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534827754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:39,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:39,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-07-14 07:00:39,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181886530] [2022-07-14 07:00:39,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 07:00:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:39,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 07:00:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=675, Unknown=3, NotChecked=162, Total=930 [2022-07-14 07:00:39,500 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 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) [2022-07-14 07:00:39,656 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) is different from false [2022-07-14 07:00:39,997 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-14 07:00:40,358 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-07-14 07:00:40,397 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-14 07:00:41,668 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-07-14 07:00:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:41,790 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-07-14 07:00:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 07:00:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-14 07:00:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:41,791 INFO L225 Difference]: With dead ends: 72 [2022-07-14 07:00:41,791 INFO L226 Difference]: Without dead ends: 72 [2022-07-14 07:00:41,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=185, Invalid=1099, Unknown=8, NotChecked=600, Total=1892 [2022-07-14 07:00:41,792 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:41,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 512 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 335 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-07-14 07:00:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-14 07:00:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-14 07:00:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-07-14 07:00:41,794 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 40 [2022-07-14 07:00:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:41,795 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-07-14 07:00:41,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 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) [2022-07-14 07:00:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-07-14 07:00:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 07:00:41,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:41,796 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:41,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:42,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:42,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash -56889687, now seen corresponding path program 1 times [2022-07-14 07:00:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:42,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139344576] [2022-07-14 07:00:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 07:00:42,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139344576] [2022-07-14 07:00:42,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139344576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:42,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:42,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 07:00:42,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069835202] [2022-07-14 07:00:42,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:42,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:00:42,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:00:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:00:42,155 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:42,267 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-14 07:00:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 07:00:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-14 07:00:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:42,268 INFO L225 Difference]: With dead ends: 92 [2022-07-14 07:00:42,268 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 07:00:42,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-14 07:00:42,269 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 156 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:42,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 88 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 07:00:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-07-14 07:00:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.25) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-07-14 07:00:42,273 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 43 [2022-07-14 07:00:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:42,273 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-07-14 07:00:42,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-07-14 07:00:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 07:00:42,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:42,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:42,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 07:00:42,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -56889686, now seen corresponding path program 1 times [2022-07-14 07:00:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648975031] [2022-07-14 07:00:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:42,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 07:00:42,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:42,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648975031] [2022-07-14 07:00:42,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648975031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:42,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:42,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 07:00:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759459886] [2022-07-14 07:00:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:42,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:00:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:00:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:00:42,368 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:42,480 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-14 07:00:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:00:42,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 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 43 [2022-07-14 07:00:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:42,481 INFO L225 Difference]: With dead ends: 74 [2022-07-14 07:00:42,481 INFO L226 Difference]: Without dead ends: 74 [2022-07-14 07:00:42,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-14 07:00:42,482 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:42,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 49 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-14 07:00:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-07-14 07:00:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-07-14 07:00:42,483 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 43 [2022-07-14 07:00:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:42,483 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-07-14 07:00:42,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-07-14 07:00:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 07:00:42,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:42,486 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:42,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 07:00:42,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash -56889649, now seen corresponding path program 1 times [2022-07-14 07:00:42,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:42,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594265352] [2022-07-14 07:00:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 07:00:42,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594265352] [2022-07-14 07:00:42,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594265352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401280825] [2022-07-14 07:00:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:42,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:42,774 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) [2022-07-14 07:00:42,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 07:00:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-14 07:00:42,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:42,952 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:43,010 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 07:00:43,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 07:00:43,048 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 [2022-07-14 07:00:43,057 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 [2022-07-14 07:00:43,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:43,124 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 07:00:43,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-14 07:00:43,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 07:00:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:43,214 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 07:00:43,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-07-14 07:00:43,244 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 07:00:43,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 07:00:43,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 07:00:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:43,299 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:43,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-07-14 07:00:43,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-07-14 07:00:43,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,552 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:43,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 58 [2022-07-14 07:00:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-14 07:00:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:43,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:43,596 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:43,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 41 [2022-07-14 07:00:43,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:43,606 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-07-14 07:00:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:00:43,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:44,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:44,387 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:44,387 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2022-07-14 07:00:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:44,393 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 18 treesize of output 12 [2022-07-14 07:00:44,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 07:00:44,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:44,405 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:44,407 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2022-07-14 07:00:44,414 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:44,415 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 180 treesize of output 178 [2022-07-14 07:00:44,421 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 198 treesize of output 182 [2022-07-14 07:00:44,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2022-07-14 07:00:46,075 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 73 treesize of output 61 [2022-07-14 07:00:49,056 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-14 07:00:49,057 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 127 treesize of output 1 [2022-07-14 07:00:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:00:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401280825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:49,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:49,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2022-07-14 07:00:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912399156] [2022-07-14 07:00:49,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 07:00:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 07:00:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1643, Unknown=7, NotChecked=0, Total=1806 [2022-07-14 07:00:49,061 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:49,891 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-07-14 07:00:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 07:00:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2022-07-14 07:00:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:49,892 INFO L225 Difference]: With dead ends: 76 [2022-07-14 07:00:49,893 INFO L226 Difference]: Without dead ends: 76 [2022-07-14 07:00:49,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=2480, Unknown=7, NotChecked=0, Total=2862 [2022-07-14 07:00:49,895 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:49,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 352 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 570 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2022-07-14 07:00:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-14 07:00:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-07-14 07:00:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.253968253968254) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2022-07-14 07:00:49,900 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2022-07-14 07:00:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:49,901 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2022-07-14 07:00:49,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2022-07-14 07:00:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 07:00:49,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:49,905 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:49,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-14 07:00:50,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash -56889648, now seen corresponding path program 1 times [2022-07-14 07:00:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:50,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152388064] [2022-07-14 07:00:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 07:00:50,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:50,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152388064] [2022-07-14 07:00:50,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152388064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:50,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060807578] [2022-07-14 07:00:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:50,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:50,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:50,502 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) [2022-07-14 07:00:50,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 07:00:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:50,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 07:00:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:50,695 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:50,761 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:00:50,762 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 11 treesize of output 11 [2022-07-14 07:00:50,790 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 [2022-07-14 07:00:50,797 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 [2022-07-14 07:00:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:50,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:50,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:50,855 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 07:00:50,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2022-07-14 07:00:50,858 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 41 treesize of output 41 [2022-07-14 07:00:50,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:50,940 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 07:00:50,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-07-14 07:00:50,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:50,951 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 07:00:50,951 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 1 case distinctions, treesize of input 34 treesize of output 31 [2022-07-14 07:00:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:51,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:51,087 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:51,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-07-14 07:00:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:51,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:51,096 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:51,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2022-07-14 07:00:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:51,415 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:51,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2022-07-14 07:00:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:51,421 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 07:00:51,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2022-07-14 07:00:51,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:51,483 INFO L356 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-07-14 07:00:51,483 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 50 [2022-07-14 07:00:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:51,489 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:51,489 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 25 [2022-07-14 07:00:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:00:51,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:51,991 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:51,991 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 46 treesize of output 50 [2022-07-14 07:00:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:52,243 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:52,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 109 [2022-07-14 07:00:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:52,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:52,251 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 83 [2022-07-14 07:00:52,255 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 119 treesize of output 95 [2022-07-14 07:00:52,266 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 81 treesize of output 69 [2022-07-14 07:00:52,268 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 107 treesize of output 89 [2022-07-14 07:00:52,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-14 07:00:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:00:52,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060807578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:52,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:52,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2022-07-14 07:00:52,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316641553] [2022-07-14 07:00:52,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:52,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 07:00:52,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 07:00:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1659, Unknown=5, NotChecked=0, Total=1806 [2022-07-14 07:00:52,430 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:53,602 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2022-07-14 07:00:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 07:00:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2022-07-14 07:00:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:53,603 INFO L225 Difference]: With dead ends: 83 [2022-07-14 07:00:53,603 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 07:00:53,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=376, Invalid=3041, Unknown=5, NotChecked=0, Total=3422 [2022-07-14 07:00:53,604 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:53,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 401 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 583 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2022-07-14 07:00:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 07:00:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-07-14 07:00:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-07-14 07:00:53,606 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 43 [2022-07-14 07:00:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:53,606 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-07-14 07:00:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-07-14 07:00:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 07:00:53,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:53,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:53,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:53,807 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,SelfDestructingSolverStorable16 [2022-07-14 07:00:53,807 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479191, now seen corresponding path program 1 times [2022-07-14 07:00:53,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:53,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355826095] [2022-07-14 07:00:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 07:00:54,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:54,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355826095] [2022-07-14 07:00:54,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355826095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:54,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:54,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 07:00:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489955121] [2022-07-14 07:00:54,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:54,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 07:00:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 07:00:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-14 07:00:54,021 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:54,432 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-07-14 07:00:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 07:00:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 07:00:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:54,434 INFO L225 Difference]: With dead ends: 115 [2022-07-14 07:00:54,435 INFO L226 Difference]: Without dead ends: 115 [2022-07-14 07:00:54,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-07-14 07:00:54,435 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 356 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:54,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 105 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:00:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-14 07:00:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2022-07-14 07:00:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 79 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) [2022-07-14 07:00:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2022-07-14 07:00:54,438 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 46 [2022-07-14 07:00:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:54,438 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2022-07-14 07:00:54,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2022-07-14 07:00:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 07:00:54,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:54,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 07:00:54,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479192, now seen corresponding path program 1 times [2022-07-14 07:00:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:54,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198759144] [2022-07-14 07:00:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 07:00:54,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:54,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198759144] [2022-07-14 07:00:54,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198759144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:54,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659160485] [2022-07-14 07:00:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:54,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:54,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:54,687 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) [2022-07-14 07:00:54,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 07:00:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 07:00:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:54,905 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 13 treesize of output 9 [2022-07-14 07:00:54,908 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 13 treesize of output 9 [2022-07-14 07:00:54,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:54,975 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 40 treesize of output 33 [2022-07-14 07:00:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:54,978 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 31 treesize of output 30 [2022-07-14 07:00:55,034 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 17 [2022-07-14 07:00:55,036 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 32 treesize of output 14 [2022-07-14 07:00:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-14 07:00:55,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:00:55,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659160485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:55,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:00:55,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 27 [2022-07-14 07:00:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037077313] [2022-07-14 07:00:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:55,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 07:00:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 07:00:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-14 07:00:55,079 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:55,357 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-07-14 07:00:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 07:00:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 07:00:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:55,358 INFO L225 Difference]: With dead ends: 95 [2022-07-14 07:00:55,358 INFO L226 Difference]: Without dead ends: 95 [2022-07-14 07:00:55,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 07:00:55,359 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:55,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 141 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:00:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-14 07:00:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2022-07-14 07:00:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-07-14 07:00:55,361 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 46 [2022-07-14 07:00:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:55,361 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-07-14 07:00:55,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-07-14 07:00:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 07:00:55,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:55,362 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:55,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:55,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:55,576 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1712591067, now seen corresponding path program 1 times [2022-07-14 07:00:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:55,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073778123] [2022-07-14 07:00:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:56,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:56,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073778123] [2022-07-14 07:00:56,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073778123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:56,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863569420] [2022-07-14 07:00:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:56,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:56,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:56,133 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) [2022-07-14 07:00:56,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 07:00:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-14 07:00:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:56,429 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 07:00:56,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 07:00:56,529 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-14 07:00:56,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-14 07:00:56,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 07:00:56,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 07:00:56,739 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-14 07:00:56,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 07:00:56,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 07:00:56,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-07-14 07:00:56,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-07-14 07:00:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:56,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:56,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 07:00:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:56,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:56,900 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 07:00:56,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-07-14 07:00:56,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-07-14 07:00:56,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 07:00:57,011 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 45 treesize of output 32 [2022-07-14 07:00:57,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 07:00:57,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-14 07:00:57,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:57,107 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:57,107 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 1 case distinctions, treesize of input 54 treesize of output 44 [2022-07-14 07:00:57,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 07:00:57,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-14 07:00:57,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,268 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:57,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 50 [2022-07-14 07:00:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:57,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-14 07:00:57,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 07:00:57,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:57,337 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-14 07:00:57,337 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 39 [2022-07-14 07:00:57,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:57,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-07-14 07:00:57,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 07:00:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:57,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:58,199 INFO L356 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2022-07-14 07:00:58,200 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 2 case distinctions, treesize of input 229 treesize of output 195 [2022-07-14 07:00:58,218 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:58,219 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 1882 treesize of output 1856 [2022-07-14 07:00:58,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:58,238 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:58,238 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1840 treesize of output 1416 [2022-07-14 07:00:58,265 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 1606 treesize of output 1542 [2022-07-14 07:00:58,297 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:58,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14761 treesize of output 14431 [2022-07-14 07:00:58,351 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 17647 treesize of output 16975