./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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-simple/dll2n_update_all_reverse.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 cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:45:45,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:45:45,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:45:45,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:45:45,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:45:45,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:45:45,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:45:45,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:45:45,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:45:45,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:45:45,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:45:45,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:45:45,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:45:45,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:45:45,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:45:45,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:45:45,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:45:45,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:45:45,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:45:45,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:45:45,453 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:45:45,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:45:45,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:45:45,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:45:45,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:45:45,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:45:45,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:45:45,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:45:45,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:45:45,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:45:45,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:45:45,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:45:45,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:45:45,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:45:45,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:45:45,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:45:45,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:45:45,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:45:45,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:45:45,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:45:45,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:45:45,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:45:45,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:45:45,520 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:45:45,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:45:45,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:45:45,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:45:45,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:45:45,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:45:45,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:45:45,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:45:45,524 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:45:45,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:45:45,525 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:45:45,525 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:45:45,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:45:45,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:45:45,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:45:45,526 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:45:45,526 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:45:45,526 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:45:45,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:45:45,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:45:45,527 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:45:45,527 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:45:45,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:45:45,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:45:45,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:45:45,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:45:45,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:45:45,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:45:45,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:45:45,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:45:45,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2022-07-21 17:45:45,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:45:45,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:45:45,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:45:45,864 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:45:45,865 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:45:45,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2022-07-21 17:45:45,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f4e7821/31811347965648159a43a69cc9c4a9ea/FLAG608ca2e48 [2022-07-21 17:45:46,385 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:45:46,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2022-07-21 17:45:46,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f4e7821/31811347965648159a43a69cc9c4a9ea/FLAG608ca2e48 [2022-07-21 17:45:46,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f4e7821/31811347965648159a43a69cc9c4a9ea [2022-07-21 17:45:46,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:45:46,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:45:46,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:45:46,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:45:46,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:45:46,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:45:46" (1/1) ... [2022-07-21 17:45:46,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc20eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:46, skipping insertion in model container [2022-07-21 17:45:46,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:45:46" (1/1) ... [2022-07-21 17:45:46,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:45:46,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:45:47,111 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-simple/dll2n_update_all_reverse.i[24473,24486] [2022-07-21 17:45:47,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:45:47,125 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:45:47,184 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-simple/dll2n_update_all_reverse.i[24473,24486] [2022-07-21 17:45:47,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:45:47,214 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:45:47,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47 WrapperNode [2022-07-21 17:45:47,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:45:47,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:45:47,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:45:47,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:45:47,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,278 INFO L137 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 114 [2022-07-21 17:45:47,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:45:47,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:45:47,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:45:47,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:45:47,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:45:47,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:45:47,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:45:47,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:45:47,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (1/1) ... [2022-07-21 17:45:47,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:45:47,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:47,364 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) [2022-07-21 17:45:47,375 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 [2022-07-21 17:45:47,404 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-21 17:45:47,405 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-21 17:45:47,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:45:47,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:45:47,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:45:47,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:45:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:45:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:45:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:45:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:45:47,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:45:47,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:45:47,560 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:45:47,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:45:47,619 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-21 17:45:47,839 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:45:47,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:45:47,845 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 17:45:47,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:45:47 BoogieIcfgContainer [2022-07-21 17:45:47,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:45:47,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:45:47,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:45:47,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:45:47,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:45:46" (1/3) ... [2022-07-21 17:45:47,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db2c9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:45:47, skipping insertion in model container [2022-07-21 17:45:47,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:45:47" (2/3) ... [2022-07-21 17:45:47,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db2c9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:45:47, skipping insertion in model container [2022-07-21 17:45:47,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:45:47" (3/3) ... [2022-07-21 17:45:47,856 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2022-07-21 17:45:47,868 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:45:47,868 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-21 17:45:47,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:45:47,929 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@1a94dac0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fa56ad5 [2022-07-21 17:45:47,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-07-21 17:45:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 65 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 17:45:47,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:47,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 17:45:47,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2022-07-21 17:45:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:47,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381947719] [2022-07-21 17:45:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:48,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381947719] [2022-07-21 17:45:48,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381947719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:48,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:48,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:45:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898281419] [2022-07-21 17:45:48,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:48,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:45:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:45:48,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:45:48,111 INFO L87 Difference]: Start difference. First operand has 67 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 65 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:48,207 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2022-07-21 17:45:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:45:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-21 17:45:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:48,216 INFO L225 Difference]: With dead ends: 111 [2022-07-21 17:45:48,216 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 17:45:48,218 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 [2022-07-21 17:45:48,223 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 63 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:48,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 136 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:45:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 17:45:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-07-21 17:45:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 58 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) [2022-07-21 17:45:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-07-21 17:45:48,250 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 5 [2022-07-21 17:45:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:48,251 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-07-21 17:45:48,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-07-21 17:45:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 17:45:48,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:48,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 17:45:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:45:48,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2022-07-21 17:45:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:48,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592724837] [2022-07-21 17:45:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592724837] [2022-07-21 17:45:48,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592724837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:48,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:48,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:45:48,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814350945] [2022-07-21 17:45:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:48,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:45:48,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:48,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:45:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:45:48,298 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:48,345 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-07-21 17:45:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:45:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-21 17:45:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:48,347 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:45:48,347 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:45:48,347 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 [2022-07-21 17:45:48,348 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 58 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:48,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:45:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 56. [2022-07-21 17:45:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 55 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) [2022-07-21 17:45:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-07-21 17:45:48,355 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 5 [2022-07-21 17:45:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:48,356 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-07-21 17:45:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-07-21 17:45:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:45:48,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:48,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:48,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:45:48,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash 678997037, now seen corresponding path program 1 times [2022-07-21 17:45:48,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:48,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257628877] [2022-07-21 17:45:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:48,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:48,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257628877] [2022-07-21 17:45:48,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257628877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:48,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:48,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:45:48,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180954082] [2022-07-21 17:45:48,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:48,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:45:48,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:48,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:45:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:45:48,390 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:48,399 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-07-21 17:45:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:45:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-21 17:45:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:48,401 INFO L225 Difference]: With dead ends: 66 [2022-07-21 17:45:48,401 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 17:45:48,401 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 [2022-07-21 17:45:48,402 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 118 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 [2022-07-21 17:45:48,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 118 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 17:45:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-07-21 17:45:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.575) internal successors, (63), 56 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) [2022-07-21 17:45:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-07-21 17:45:48,408 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 8 [2022-07-21 17:45:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:48,409 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-07-21 17:45:48,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-07-21 17:45:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:45:48,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:48,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:48,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:45:48,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2022-07-21 17:45:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:48,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767288287] [2022-07-21 17:45:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767288287] [2022-07-21 17:45:48,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767288287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:48,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:48,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:45:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95973898] [2022-07-21 17:45:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:45:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:45:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:45:48,477 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:48,519 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-07-21 17:45:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:45:48,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 17:45:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:48,520 INFO L225 Difference]: With dead ends: 63 [2022-07-21 17:45:48,520 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 17:45:48,521 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 [2022-07-21 17:45:48,522 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:48,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 113 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 17:45:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-07-21 17:45:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.511111111111111) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-07-21 17:45:48,535 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 9 [2022-07-21 17:45:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:48,535 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-07-21 17:45:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-07-21 17:45:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:45:48,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:48,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:48,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:45:48,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2114731710, now seen corresponding path program 1 times [2022-07-21 17:45:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:48,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968016993] [2022-07-21 17:45:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:48,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:48,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968016993] [2022-07-21 17:45:48,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968016993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:48,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899419449] [2022-07-21 17:45:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:48,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:48,623 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) [2022-07-21 17:45:48,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:45:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:45:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:48,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899419449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:48,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:48,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-21 17:45:48,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117563068] [2022-07-21 17:45:48,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:48,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:45:48,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:45:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:45:48,791 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:48,812 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-07-21 17:45:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:45:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 17:45:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:48,813 INFO L225 Difference]: With dead ends: 64 [2022-07-21 17:45:48,815 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 17:45:48,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:45:48,817 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:48,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 167 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 17:45:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-21 17:45:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-21 17:45:48,826 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 15 [2022-07-21 17:45:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:48,830 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-21 17:45:48,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-21 17:45:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:45:48,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:48,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:48,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:49,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2022-07-21 17:45:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953252499] [2022-07-21 17:45:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953252499] [2022-07-21 17:45:49,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953252499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:49,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416346224] [2022-07-21 17:45:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:49,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:49,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:49,189 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) [2022-07-21 17:45:49,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:45:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:45:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:49,296 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 [2022-07-21 17:45:49,332 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 17:45:49,333 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 [2022-07-21 17:45:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:49,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:49,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416346224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:49,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:49,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-21 17:45:49,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627528192] [2022-07-21 17:45:49,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:49,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:45:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:45:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:49,489 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:49,556 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-07-21 17:45:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:45:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-21 17:45:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:49,557 INFO L225 Difference]: With dead ends: 77 [2022-07-21 17:45:49,558 INFO L226 Difference]: Without dead ends: 77 [2022-07-21 17:45:49,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:45:49,559 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 266 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:49,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 66 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-07-21 17:45:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-21 17:45:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2022-07-21 17:45:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 62 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) [2022-07-21 17:45:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-07-21 17:45:49,564 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 16 [2022-07-21 17:45:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:49,564 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-07-21 17:45:49,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-07-21 17:45:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:45:49,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:49,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:49,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:49,787 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,SelfDestructingSolverStorable5 [2022-07-21 17:45:49,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2022-07-21 17:45:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:49,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420225820] [2022-07-21 17:45:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:49,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:49,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420225820] [2022-07-21 17:45:49,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420225820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:49,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059045868] [2022-07-21 17:45:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:49,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:49,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:49,932 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) [2022-07-21 17:45:49,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:45:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:45:50,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:50,040 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 [2022-07-21 17:45:50,059 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 [2022-07-21 17:45:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:50,126 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 [2022-07-21 17:45:50,138 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:45:50,138 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 [2022-07-21 17:45:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:50,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:50,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059045868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:50,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:50,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-21 17:45:50,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984907396] [2022-07-21 17:45:50,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:50,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:45:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:45:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:45:50,411 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:50,519 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-07-21 17:45:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:45:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2022-07-21 17:45:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:50,521 INFO L225 Difference]: With dead ends: 76 [2022-07-21 17:45:50,521 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 17:45:50,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:45:50,522 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 294 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:50,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 67 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-07-21 17:45:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 17:45:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2022-07-21 17:45:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.446808510638298) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-07-21 17:45:50,527 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 16 [2022-07-21 17:45:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:50,527 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-07-21 17:45:50,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-07-21 17:45:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:45:50,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:50,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:50,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:50,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:50,740 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1891969267, now seen corresponding path program 2 times [2022-07-21 17:45:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:50,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661380762] [2022-07-21 17:45:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661380762] [2022-07-21 17:45:50,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661380762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025434120] [2022-07-21 17:45:50,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:45:50,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:50,786 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) [2022-07-21 17:45:50,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:45:50,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:45:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:45:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:45:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:50,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:50,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025434120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:50,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:50,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-21 17:45:50,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016420923] [2022-07-21 17:45:50,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:45:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:45:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:45:50,913 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:50,941 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-07-21 17:45:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:45:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 17:45:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:50,943 INFO L225 Difference]: With dead ends: 62 [2022-07-21 17:45:50,943 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 17:45:50,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:45:50,944 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 103 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:50,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 17:45:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-21 17:45:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.425531914893617) 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) [2022-07-21 17:45:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-07-21 17:45:50,956 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 22 [2022-07-21 17:45:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:50,957 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-07-21 17:45:50,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-07-21 17:45:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:45:50,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:50,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:50,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:51,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1779022382, now seen corresponding path program 1 times [2022-07-21 17:45:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:51,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516882216] [2022-07-21 17:45:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:45:51,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516882216] [2022-07-21 17:45:51,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516882216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:51,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:51,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:45:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643876437] [2022-07-21 17:45:51,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:51,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:45:51,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:51,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:45:51,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:51,244 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:51,406 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-07-21 17:45:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:45:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 17:45:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:51,407 INFO L225 Difference]: With dead ends: 113 [2022-07-21 17:45:51,408 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 17:45:51,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:45:51,409 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 259 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:51,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:45:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 17:45:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 65. [2022-07-21 17:45:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.46) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-07-21 17:45:51,413 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 23 [2022-07-21 17:45:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:51,413 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-07-21 17:45:51,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-07-21 17:45:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:45:51,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:51,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:51,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 17:45:51,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1779022381, now seen corresponding path program 1 times [2022-07-21 17:45:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661761545] [2022-07-21 17:45:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661761545] [2022-07-21 17:45:51,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661761545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:51,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:51,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:45:51,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516032563] [2022-07-21 17:45:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:45:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:45:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:51,503 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-07-21 17:45:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:51,645 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-07-21 17:45:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:45:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 17:45:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:51,646 INFO L225 Difference]: With dead ends: 100 [2022-07-21 17:45:51,646 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 17:45:51,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:45:51,647 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 265 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:51,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 101 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:45:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 17:45:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2022-07-21 17:45:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.42) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-07-21 17:45:51,650 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 23 [2022-07-21 17:45:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:51,651 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-07-21 17:45:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-07-21 17:45:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-07-21 17:45:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:45:51,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:51,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:51,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:45:51,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash -244809887, now seen corresponding path program 1 times [2022-07-21 17:45:51,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:51,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105757557] [2022-07-21 17:45:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:51,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:45:51,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:51,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105757557] [2022-07-21 17:45:51,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105757557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:51,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:51,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:45:51,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517390219] [2022-07-21 17:45:51,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:51,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:45:51,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:45:51,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:51,708 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-07-21 17:45:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:51,837 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-07-21 17:45:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:45:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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 25 [2022-07-21 17:45:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:51,838 INFO L225 Difference]: With dead ends: 100 [2022-07-21 17:45:51,838 INFO L226 Difference]: Without dead ends: 100 [2022-07-21 17:45:51,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:45:51,839 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 243 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:51,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 106 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:45:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-21 17:45:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2022-07-21 17:45:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 67 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) [2022-07-21 17:45:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-21 17:45:51,842 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 25 [2022-07-21 17:45:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:51,842 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-21 17:45:51,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-07-21 17:45:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-21 17:45:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:45:51,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:51,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:51,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 17:45:51,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash -244809886, now seen corresponding path program 1 times [2022-07-21 17:45:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:51,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093146329] [2022-07-21 17:45:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093146329] [2022-07-21 17:45:51,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093146329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961138064] [2022-07-21 17:45:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:51,916 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) [2022-07-21 17:45:51,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:45:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:52,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:45:52,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 17:45:52,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:45:52,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961138064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:52,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:45:52,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-21 17:45:52,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115951481] [2022-07-21 17:45:52,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:45:52,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:52,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:45:52,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:45:52,042 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:52,057 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-07-21 17:45:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:45:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-21 17:45:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:52,058 INFO L225 Difference]: With dead ends: 65 [2022-07-21 17:45:52,058 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 17:45:52,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:45:52,059 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 69 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:52,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 62 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 17:45:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2022-07-21 17:45:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-07-21 17:45:52,062 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 25 [2022-07-21 17:45:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:52,062 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-07-21 17:45:52,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-07-21 17:45:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:45:52,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:52,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:52,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:52,267 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,SelfDestructingSolverStorable11 [2022-07-21 17:45:52,267 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689078, now seen corresponding path program 1 times [2022-07-21 17:45:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672361556] [2022-07-21 17:45:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:52,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672361556] [2022-07-21 17:45:52,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672361556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160375391] [2022-07-21 17:45:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:52,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:52,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:52,349 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) [2022-07-21 17:45:52,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:45:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:52,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:45:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 17:45:52,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:45:52,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160375391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:52,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:45:52,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 7 [2022-07-21 17:45:52,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022973448] [2022-07-21 17:45:52,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:45:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:45:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:52,496 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:52,527 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-21 17:45:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:45:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 17:45:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:52,530 INFO L225 Difference]: With dead ends: 49 [2022-07-21 17:45:52,530 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 17:45:52,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:45:52,531 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:52,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 17:45:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 17:45:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-21 17:45:52,538 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 26 [2022-07-21 17:45:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:52,538 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-21 17:45:52,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-21 17:45:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:45:52,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:52,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:52,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:52,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:52,755 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689023, now seen corresponding path program 1 times [2022-07-21 17:45:52,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673414951] [2022-07-21 17:45:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:52,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:52,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673414951] [2022-07-21 17:45:52,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673414951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:52,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316454610] [2022-07-21 17:45:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:52,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:52,932 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) [2022-07-21 17:45:52,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:45:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:53,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:45:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:53,046 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 [2022-07-21 17:45:53,073 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:45:53,073 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 [2022-07-21 17:45:53,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-21 17:45:53,125 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-21 17:45:53,126 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 23 treesize of output 22 [2022-07-21 17:45:53,142 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:45:53,142 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 34 treesize of output 35 [2022-07-21 17:45:53,259 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 31 treesize of output 13 [2022-07-21 17:45:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:53,378 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-07-21 17:45:53,378 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 21 treesize of output 20 [2022-07-21 17:45:53,382 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_730 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_730) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) is different from false [2022-07-21 17:45:53,406 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_728 Int) (v_ArrVal_730 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_728)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_730) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) is different from false [2022-07-21 17:45:53,421 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:45:53,421 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 27 treesize of output 33 [2022-07-21 17:45:53,425 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 36 treesize of output 24 [2022-07-21 17:45:53,428 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 [2022-07-21 17:45:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 17:45:53,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316454610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:53,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:53,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2022-07-21 17:45:53,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820481901] [2022-07-21 17:45:53,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:53,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:45:53,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:45:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=736, Unknown=2, NotChecked=110, Total=930 [2022-07-21 17:45:53,504 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 31 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) [2022-07-21 17:45:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:54,659 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-07-21 17:45:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:45:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 31 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) Word has length 26 [2022-07-21 17:45:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:54,662 INFO L225 Difference]: With dead ends: 129 [2022-07-21 17:45:54,662 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 17:45:54,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=1757, Unknown=4, NotChecked=178, Total=2256 [2022-07-21 17:45:54,663 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 514 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:54,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 721 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 766 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2022-07-21 17:45:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 17:45:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 69. [2022-07-21 17:45:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 68 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) [2022-07-21 17:45:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-07-21 17:45:54,666 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 26 [2022-07-21 17:45:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:54,666 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-07-21 17:45:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 31 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) [2022-07-21 17:45:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-07-21 17:45:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:45:54,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:54,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:54,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:54,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:54,884 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1040689024, now seen corresponding path program 1 times [2022-07-21 17:45:54,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:54,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738818757] [2022-07-21 17:45:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:55,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:55,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738818757] [2022-07-21 17:45:55,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738818757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831501404] [2022-07-21 17:45:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:55,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:55,155 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) [2022-07-21 17:45:55,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:45:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:55,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:45:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:55,289 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 [2022-07-21 17:45:55,339 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:45:55,340 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 [2022-07-21 17:45:55,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:45:55,370 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 [2022-07-21 17:45:55,405 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-21 17:45:55,405 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 23 treesize of output 22 [2022-07-21 17:45:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:45:55,419 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 23 treesize of output 22 [2022-07-21 17:45:55,446 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:45:55,448 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 [2022-07-21 17:45:55,451 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 [2022-07-21 17:45:55,609 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 39 treesize of output 21 [2022-07-21 17:45:55,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-21 17:45:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:45:55,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:55,923 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:45:55,923 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 [2022-07-21 17:45:55,965 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_832 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_834 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_834) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)))) (forall ((v_prenex_1 (Array Int Int))) (<= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8)))) is different from false [2022-07-21 17:45:55,989 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 (Array Int Int)) (v_ArrVal_831 Int)) (<= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_831)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (forall ((v_ArrVal_830 Int) (v_ArrVal_832 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_830)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_834 (Array Int Int)) (v_ArrVal_831 Int)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_831)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_834) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))))) is different from false [2022-07-21 17:45:56,008 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-21 17:45:56,009 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 27 treesize of output 33 [2022-07-21 17:45:56,011 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 36 treesize of output 24 [2022-07-21 17:45:56,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:45:56,025 INFO L356 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2022-07-21 17:45:56,025 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 29 treesize of output 1 [2022-07-21 17:45:56,031 INFO L356 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2022-07-21 17:45:56,032 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 27 treesize of output 1 [2022-07-21 17:45:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 17:45:56,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831501404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:56,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:56,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 35 [2022-07-21 17:45:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842706910] [2022-07-21 17:45:56,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 17:45:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:56,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 17:45:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1031, Unknown=2, NotChecked=130, Total=1260 [2022-07-21 17:45:56,207 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:57,828 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-07-21 17:45:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:45:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 17:45:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:57,829 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:45:57,829 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:45:57,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=311, Invalid=2145, Unknown=2, NotChecked=194, Total=2652 [2022-07-21 17:45:57,831 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 809 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:57,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 842 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 786 Invalid, 0 Unknown, 306 Unchecked, 0.5s Time] [2022-07-21 17:45:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:45:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 77. [2022-07-21 17:45:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 76 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) [2022-07-21 17:45:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-07-21 17:45:57,833 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 26 [2022-07-21 17:45:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:57,833 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-07-21 17:45:57,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-07-21 17:45:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:45:57,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:57,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:57,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 17:45:58,035 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -709592258, now seen corresponding path program 1 times [2022-07-21 17:45:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:58,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781792201] [2022-07-21 17:45:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:58,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:45:58,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:58,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781792201] [2022-07-21 17:45:58,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781792201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:58,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:45:58,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:45:58,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240237134] [2022-07-21 17:45:58,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:58,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:45:58,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:45:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:58,090 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 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) [2022-07-21 17:45:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:58,204 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-07-21 17:45:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:45:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 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 31 [2022-07-21 17:45:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:58,205 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:45:58,205 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:45:58,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:45:58,206 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:58,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 63 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:45:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:45:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2022-07-21 17:45:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 77 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) [2022-07-21 17:45:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-07-21 17:45:58,208 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 31 [2022-07-21 17:45:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:58,209 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-07-21 17:45:58,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 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) [2022-07-21 17:45:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-07-21 17:45:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:45:58,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:58,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:58,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 17:45:58,210 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash -709592257, now seen corresponding path program 1 times [2022-07-21 17:45:58,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:58,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428356267] [2022-07-21 17:45:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:58,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:58,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:58,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428356267] [2022-07-21 17:45:58,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428356267] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763988310] [2022-07-21 17:45:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:58,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:58,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:45:58,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:45:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:45:58,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 17:45:58,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:45:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763988310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:58,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:45:58,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-21 17:45:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816676929] [2022-07-21 17:45:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:45:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:45:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:58,435 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:58,465 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-07-21 17:45:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:45:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 17:45:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:58,466 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:45:58,466 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:45:58,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:45:58,467 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:58,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:45:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2022-07-21 17:45:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 74 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) [2022-07-21 17:45:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-07-21 17:45:58,471 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 31 [2022-07-21 17:45:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:58,471 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-07-21 17:45:58,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-07-21 17:45:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:45:58,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:58,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:58,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 17:45:58,684 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1698966507, now seen corresponding path program 2 times [2022-07-21 17:45:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255049720] [2022-07-21 17:45:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:58,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:58,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255049720] [2022-07-21 17:45:58,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255049720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923471589] [2022-07-21 17:45:58,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:45:58,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:58,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:45:58,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:45:58,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:45:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:45:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:45:58,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:45:58,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:45:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923471589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:45:58,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:45:58,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-07-21 17:45:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897580910] [2022-07-21 17:45:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:45:58,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:45:58,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:45:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:45:58,910 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2022-07-21 17:45:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:58,917 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-07-21 17:45:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:45:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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 34 [2022-07-21 17:45:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:58,918 INFO L225 Difference]: With dead ends: 53 [2022-07-21 17:45:58,918 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 17:45:58,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:45:58,919 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 31 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:58,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 17:45:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 17:45:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-21 17:45:58,921 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2022-07-21 17:45:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:58,922 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-21 17:45:58,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2022-07-21 17:45:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-21 17:45:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:45:58,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:58,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:58,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:59,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 17:45:59,145 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:59,145 INFO L85 PathProgramCache]: Analyzing trace with hash -674776797, now seen corresponding path program 1 times [2022-07-21 17:45:59,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:59,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481484449] [2022-07-21 17:45:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:59,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:45:59,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:59,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481484449] [2022-07-21 17:45:59,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481484449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:59,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571340441] [2022-07-21 17:45:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:59,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:59,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:59,198 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:45:59,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:45:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:45:59,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:45:59,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:45:59,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571340441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:59,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:59,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-07-21 17:45:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484223659] [2022-07-21 17:45:59,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:59,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:45:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:45:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:45:59,401 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:45:59,431 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-07-21 17:45:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:45:59,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 17:45:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:45:59,432 INFO L225 Difference]: With dead ends: 57 [2022-07-21 17:45:59,432 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 17:45:59,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:45:59,433 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:45:59,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 81 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:45:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 17:45:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 17:45:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.196078431372549) 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) [2022-07-21 17:45:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-21 17:45:59,436 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 34 [2022-07-21 17:45:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:45:59,436 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-21 17:45:59,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:45:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-21 17:45:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:45:59,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:45:59,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:45:59,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:45:59,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:59,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:45:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:45:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -634882153, now seen corresponding path program 1 times [2022-07-21 17:45:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:45:59,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640569472] [2022-07-21 17:45:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:59,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:45:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:45:59,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:45:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640569472] [2022-07-21 17:45:59,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640569472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:45:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701934687] [2022-07-21 17:45:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:45:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:45:59,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:45:59,732 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:45:59,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:45:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:45:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:45:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:45:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:45:59,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:45:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:45:59,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701934687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:45:59,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:45:59,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-21 17:45:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944091825] [2022-07-21 17:45:59,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:45:59,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:45:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:45:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:45:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:45:59,959 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:46:00,004 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-07-21 17:46:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:46:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 17:46:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:46:00,005 INFO L225 Difference]: With dead ends: 52 [2022-07-21 17:46:00,005 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 17:46:00,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:46:00,009 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:46:00,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:46:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 17:46:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-21 17:46:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-21 17:46:00,019 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 34 [2022-07-21 17:46:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:46:00,019 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-21 17:46:00,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-21 17:46:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 17:46:00,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:46:00,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:46:00,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:46:00,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:46:00,246 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:46:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:46:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash -427165145, now seen corresponding path program 2 times [2022-07-21 17:46:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:46:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099588215] [2022-07-21 17:46:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:46:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:46:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:46:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:46:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:46:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099588215] [2022-07-21 17:46:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099588215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:46:00,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:46:00,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:46:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588809872] [2022-07-21 17:46:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:46:00,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:46:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:46:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:46:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:46:00,332 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 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) [2022-07-21 17:46:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:46:00,450 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-07-21 17:46:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:46:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 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 39 [2022-07-21 17:46:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:46:00,451 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:46:00,451 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:46:00,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:46:00,452 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:46:00,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 36 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:46:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:46:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-21 17:46:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-21 17:46:00,453 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 39 [2022-07-21 17:46:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:46:00,454 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-21 17:46:00,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 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) [2022-07-21 17:46:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-21 17:46:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 17:46:00,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:46:00,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:46:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 17:46:00,454 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:46:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:46:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash -357219036, now seen corresponding path program 1 times [2022-07-21 17:46:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:46:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112385] [2022-07-21 17:46:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:46:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:46:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:46:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:46:00,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:46:00,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112385] [2022-07-21 17:46:00,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:46:00,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:46:00,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:46:00,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658528129] [2022-07-21 17:46:00,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:46:00,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:46:00,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:46:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:46:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:46:00,515 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:46:00,592 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-07-21 17:46:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:46:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2022-07-21 17:46:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:46:00,593 INFO L225 Difference]: With dead ends: 57 [2022-07-21 17:46:00,593 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 17:46:00,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:46:00,594 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:46:00,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 58 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:46:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 17:46:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-07-21 17:46:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-21 17:46:00,596 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 40 [2022-07-21 17:46:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:46:00,597 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-21 17:46:00,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-21 17:46:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:46:00,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:46:00,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:46:00,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 17:46:00,598 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:46:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:46:00,598 INFO L85 PathProgramCache]: Analyzing trace with hash 311339877, now seen corresponding path program 1 times [2022-07-21 17:46:00,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:46:00,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593369043] [2022-07-21 17:46:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:46:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:46:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:46:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:46:00,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:46:00,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593369043] [2022-07-21 17:46:00,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593369043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:46:00,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:46:00,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:46:00,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338511030] [2022-07-21 17:46:00,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:46:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:46:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:46:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:46:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:46:00,658 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:46:00,748 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-07-21 17:46:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:46:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 42 [2022-07-21 17:46:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:46:00,749 INFO L225 Difference]: With dead ends: 55 [2022-07-21 17:46:00,749 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:46:00,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:46:00,750 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:46:00,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:46:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:46:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-21 17:46:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.12) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-07-21 17:46:00,752 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 42 [2022-07-21 17:46:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:46:00,752 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-07-21 17:46:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-07-21 17:46:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:46:00,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:46:00,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:46:00,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 17:46:00,753 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:46:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:46:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2002912181, now seen corresponding path program 1 times [2022-07-21 17:46:00,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:46:00,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419883790] [2022-07-21 17:46:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:46:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:46:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:46:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:46:01,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:46:01,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419883790] [2022-07-21 17:46:01,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419883790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:46:01,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782646719] [2022-07-21 17:46:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:46:01,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:46:01,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:46:01,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:46:01,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:46:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:46:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 17:46:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:46:01,273 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 [2022-07-21 17:46:01,302 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:46:01,303 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 [2022-07-21 17:46:01,314 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 [2022-07-21 17:46:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:46:01,323 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 23 treesize of output 22 [2022-07-21 17:46:01,341 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:46:01,342 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 34 treesize of output 35 [2022-07-21 17:46:01,459 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:46:01,462 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 28 treesize of output 29 [2022-07-21 17:46:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:46:01,518 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 29 treesize of output 24 [2022-07-21 17:46:01,589 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:46:01,590 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 27 treesize of output 23 [2022-07-21 17:46:01,701 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 [2022-07-21 17:46:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:46:01,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:46:03,888 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1644 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-07-21 17:46:04,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int) (v_ArrVal_1642 (Array Int Int))) (or (and (forall ((v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-07-21 17:46:04,456 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)))) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))))) is different from false [2022-07-21 17:46:04,481 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)))) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-07-21 17:46:04,520 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1)) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-07-21 17:46:04,539 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_#res#1.base|))) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))))) is different from false [2022-07-21 17:46:04,558 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1)) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))) (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) is different from false [2022-07-21 17:46:04,611 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1)) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)))))) is different from false [2022-07-21 17:46:04,634 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:46:04,634 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 61 treesize of output 65 [2022-07-21 17:46:04,673 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1641 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1641))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1642)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_prenex_4 Int) (v_prenex_2 (Array Int Int)) (v_prenex_3 (Array Int Int))) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_3))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_prenex_2)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_prenex_4) 4))))))) is different from false [2022-07-21 17:46:04,735 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1639 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1641 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_1639)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1641))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1642)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_prenex_4 Int) (v_prenex_2 (Array Int Int)) (v_prenex_3 (Array Int Int))) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (store (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_1639)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_3))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_prenex_2)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_prenex_4) 4))))))) is different from false [2022-07-21 17:46:04,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:46:04,750 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:46:04,750 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 56 treesize of output 47 [2022-07-21 17:46:04,758 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 295 treesize of output 277 [2022-07-21 17:46:04,772 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:46:04,773 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 299 treesize of output 277 [2022-07-21 17:46:04,779 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 252 treesize of output 244 [2022-07-21 17:46:04,788 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:46:04,789 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 266 treesize of output 249 [2022-07-21 17:46:04,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:46:04,853 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-21 17:46:04,853 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 1 [2022-07-21 17:46:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-21 17:46:04,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782646719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:46:04,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:46:04,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 42 [2022-07-21 17:46:04,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677567048] [2022-07-21 17:46:04,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:46:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 17:46:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:46:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 17:46:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=960, Unknown=10, NotChecked=710, Total=1806 [2022-07-21 17:46:04,912 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:46:07,216 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)))) (and (= |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 0) (not (= .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (= .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|) (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1)) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)))))) (= (select |c_#valid| |c_ULTIMATE.start_dll_create_~head~0#1.base|) 1) (= (select |c_#valid| .cse0) 1))) is different from false [2022-07-21 17:46:09,220 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) 4))) (and (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| 0) (not (= .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1)) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))) (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))))) is different from false [2022-07-21 17:46:13,234 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1)) (forall ((v_ArrVal_1642 (Array Int Int)) (v_ArrVal_1644 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1642) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) (not (= .cse1 |c_ULTIMATE.start_dll_create_#res#1.base|)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (= |c_ULTIMATE.start_dll_create_#res#1.offset| 0) (= (select |c_#valid| .cse1) 1))) is different from false [2022-07-21 17:46:51,971 WARN L233 SmtUtils]: Spent 24.04s on a formula simplification. DAG size of input: 45 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 17:46:59,169 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1644 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (= .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.base|))) is different from false [2022-07-21 17:46:59,444 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_20| Int)) (or (and (forall ((v_ArrVal_1644 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1644 Int)) (= (select |c_#valid| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_20| v_ArrVal_1644) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_20|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2022-07-21 17:47:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:02,131 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-07-21 17:47:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:47:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 17:47:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:02,132 INFO L225 Difference]: With dead ends: 62 [2022-07-21 17:47:02,132 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 17:47:02,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 60.0s TimeCoverageRelationStatistics Valid=220, Invalid=1525, Unknown=37, NotChecked=1410, Total=3192 [2022-07-21 17:47:02,134 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 559 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:02,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 211 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 500 Invalid, 0 Unknown, 559 Unchecked, 0.2s Time] [2022-07-21 17:47:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 17:47:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-07-21 17:47:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 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) [2022-07-21 17:47:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-07-21 17:47:02,137 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 45 [2022-07-21 17:47:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:02,137 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-07-21 17:47:02,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-07-21 17:47:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:47:02,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:02,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:02,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:47:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 17:47:02,355 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:47:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2002912180, now seen corresponding path program 1 times [2022-07-21 17:47:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734050001] [2022-07-21 17:47:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:47:02,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734050001] [2022-07-21 17:47:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734050001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872827728] [2022-07-21 17:47:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:02,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:02,860 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:02,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:47:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-21 17:47:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:03,043 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 [2022-07-21 17:47:03,107 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:03,107 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 [2022-07-21 17:47:03,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-21 17:47:03,154 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 [2022-07-21 17:47:03,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:03,194 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 23 treesize of output 22 [2022-07-21 17:47:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:03,200 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 23 treesize of output 22 [2022-07-21 17:47:03,222 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:47:03,222 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 [2022-07-21 17:47:03,226 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 [2022-07-21 17:47:03,373 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:47:03,374 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 38 treesize of output 37 [2022-07-21 17:47:03,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:47:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:03,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 17:47:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:03,462 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 29 treesize of output 24 [2022-07-21 17:47:03,574 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:03,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-21 17:47:03,581 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:03,581 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 27 treesize of output 23 [2022-07-21 17:47:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:03,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:06,033 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) is different from false [2022-07-21 17:47:06,103 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (and (forall ((v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1777) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4))))))) is different from false [2022-07-21 17:47:06,149 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (and (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1777) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4))))))) is different from false [2022-07-21 17:47:06,173 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ 4 (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4)))) (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)))) (<= (+ 8 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4)) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1777) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4)))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) is different from false [2022-07-21 17:47:06,237 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1776) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1777) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4)))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) is different from false [2022-07-21 17:47:06,257 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)))) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1776) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1777) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4))))) (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_1776) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4)))) (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) is different from false [2022-07-21 17:47:06,278 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (and (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1776) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)))) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1776) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1777) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4)))))))) is different from false [2022-07-21 17:47:06,313 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ 4 (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1776) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4)))) (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)))) (<= (+ 8 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1776) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4)) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1777) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4)))))) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) is different from false [2022-07-21 17:47:06,337 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:06,337 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 87 treesize of output 91 [2022-07-21 17:47:06,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (and (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1778 Int) (v_prenex_6 (Array Int Int))) (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_6))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1777)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1775 (Array Int Int)) (v_ArrVal_1773 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1773) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1775) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1776) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_prenex_5 (Array Int Int)) (v_prenex_6 (Array Int Int)) (v_prenex_8 Int) (v_prenex_7 (Array Int Int))) (<= (select (store (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_7) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_6) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_prenex_5) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_prenex_8) 4) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)))))) is different from false [2022-07-21 17:47:06,490 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1772 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int) (v_ArrVal_1769 Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|) (and (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1778 Int) (v_prenex_6 (Array Int Int))) (= (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_1772)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_6))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1777)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_prenex_5 (Array Int Int)) (v_prenex_6 (Array Int Int)) (v_prenex_8 Int) (v_prenex_7 (Array Int Int))) (<= (select (store (select (let ((.cse1 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 v_ArrVal_1769)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_7) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 v_ArrVal_1772)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_6) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_prenex_5)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_prenex_8) 4) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4))) (forall ((v_ArrVal_1776 (Array Int Int)) (v_ArrVal_1775 (Array Int Int)) (v_ArrVal_1773 (Array Int Int)) (v_ArrVal_1779 Int)) (<= 0 (+ 4 (select (store (select (let ((.cse2 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2 v_ArrVal_1769)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1773) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2 v_ArrVal_1772)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1775) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1776)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4))))))) is different from false [2022-07-21 17:47:06,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:06,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:06,509 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 57 treesize of output 63 [2022-07-21 17:47:06,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:06,518 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:06,518 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 42 treesize of output 48 [2022-07-21 17:47:06,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2022-07-21 17:47:06,525 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 230 treesize of output 222 [2022-07-21 17:47:06,534 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:06,535 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 258 treesize of output 258 [2022-07-21 17:47:06,542 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 222 treesize of output 218 [2022-07-21 17:47:06,547 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 324 treesize of output 314 [2022-07-21 17:47:06,554 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 258 treesize of output 234 [2022-07-21 17:47:06,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:06,671 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-21 17:47:06,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 1 [2022-07-21 17:47:06,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:06,678 INFO L356 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-07-21 17:47:06,678 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 1 [2022-07-21 17:47:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-21 17:47:06,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872827728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:47:06,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:47:06,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 21] total 51 [2022-07-21 17:47:06,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021379470] [2022-07-21 17:47:06,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:06,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 17:47:06,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 17:47:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1588, Unknown=10, NotChecked=890, Total=2652 [2022-07-21 17:47:06,879 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:08,142 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= 12 (select |c_#length| .cse0)) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))) (= .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.base|))) is different from false [2022-07-21 17:47:08,566 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= 12 (select |c_#length| .cse0)) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_23| Int)) (or (and (forall ((v_ArrVal_1779 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 4))) (forall ((v_ArrVal_1778 Int) (v_ArrVal_1779 Int)) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1779) 4) 8) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_23| v_ArrVal_1778) 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_23|))))) is different from false [2022-07-21 17:47:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:08,990 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-07-21 17:47:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:47:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 17:47:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:08,997 INFO L225 Difference]: With dead ends: 66 [2022-07-21 17:47:08,997 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 17:47:08,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=348, Invalid=2658, Unknown=12, NotChecked=1404, Total=4422 [2022-07-21 17:47:08,999 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 258 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 663 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:08,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 270 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 598 Invalid, 0 Unknown, 663 Unchecked, 0.3s Time] [2022-07-21 17:47:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 17:47:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-21 17:47:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 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) [2022-07-21 17:47:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-21 17:47:09,001 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-07-21 17:47:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:09,001 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-21 17:47:09,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 52 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-21 17:47:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:47:09,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:09,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:09,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 17:47:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:09,203 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:47:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1960736865, now seen corresponding path program 1 times [2022-07-21 17:47:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147057387] [2022-07-21 17:47:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:47:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:09,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147057387] [2022-07-21 17:47:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147057387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:09,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706539608] [2022-07-21 17:47:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:09,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:09,571 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:09,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:47:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 17:47:09,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:09,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:47:09,784 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:09,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:47:09,804 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 [2022-07-21 17:47:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:09,821 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 26 [2022-07-21 17:47:09,844 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:47:09,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-07-21 17:47:09,981 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:47:09,982 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 27 treesize of output 28 [2022-07-21 17:47:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:10,034 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 28 treesize of output 23 [2022-07-21 17:47:10,099 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:10,099 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 26 treesize of output 22 [2022-07-21 17:47:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:10,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:10,672 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int)) (or (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,688 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1907) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,701 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_1907) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,709 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_1907) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,723 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1907) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,740 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_1907) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,748 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1907) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)))) is different from false [2022-07-21 17:47:10,762 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int))) (or (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1907) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,770 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int)) (v_ArrVal_1905 (Array Int Int))) (or (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1905))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1907)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) is different from false [2022-07-21 17:47:10,787 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1904 Int) (v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int) (v_ArrVal_1907 (Array Int Int)) (v_ArrVal_1905 (Array Int Int))) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|) (not (= (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_1904)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1905))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1907)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)))) is different from false [2022-07-21 17:47:10,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:10,798 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:10,799 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 56 treesize of output 47 [2022-07-21 17:47:10,802 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 171 treesize of output 159 [2022-07-21 17:47:10,811 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:10,812 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 161 treesize of output 154 [2022-07-21 17:47:10,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:10,824 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 163 treesize of output 151 [2022-07-21 17:47:10,830 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 122 treesize of output 118 [2022-07-21 17:47:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-21 17:47:11,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706539608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:47:11,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:47:11,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 22] total 44 [2022-07-21 17:47:11,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052556562] [2022-07-21 17:47:11,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:11,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 17:47:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 17:47:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1019, Unknown=10, NotChecked=730, Total=1892 [2022-07-21 17:47:11,034 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:14,911 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (not (= .cse0 0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int)) (or (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))) (= .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.base|))) is different from false [2022-07-21 17:47:15,179 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (not (= .cse0 0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (forall ((v_ArrVal_1909 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_26| Int)) (or (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_26| v_ArrVal_1909) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_26|))))) is different from false [2022-07-21 17:47:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:15,471 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2022-07-21 17:47:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:47:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 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 [2022-07-21 17:47:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:15,472 INFO L225 Difference]: With dead ends: 63 [2022-07-21 17:47:15,472 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 17:47:15,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=313, Invalid=1979, Unknown=12, NotChecked=1236, Total=3540 [2022-07-21 17:47:15,474 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:15,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 375 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 475 Invalid, 0 Unknown, 523 Unchecked, 0.2s Time] [2022-07-21 17:47:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 17:47:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-07-21 17:47:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 59 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) [2022-07-21 17:47:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-21 17:47:15,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 46 [2022-07-21 17:47:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:15,476 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-21 17:47:15,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-21 17:47:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:47:15,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:15,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:15,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 17:47:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 17:47:15,695 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:47:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1223965472, now seen corresponding path program 1 times [2022-07-21 17:47:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:15,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118042607] [2022-07-21 17:47:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:47:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118042607] [2022-07-21 17:47:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118042607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254696299] [2022-07-21 17:47:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:16,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:16,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:16,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:47:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 17:47:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:16,285 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 [2022-07-21 17:47:16,333 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:16,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:47:16,377 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 [2022-07-21 17:47:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:16,435 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 23 treesize of output 22 [2022-07-21 17:47:16,485 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:47:16,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-07-21 17:47:16,776 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:47:16,776 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 37 treesize of output 36 [2022-07-21 17:47:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:16,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:16,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-21 17:47:16,990 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:16,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-07-21 17:47:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:47:17,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:17,644 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (<= (+ (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|))) is different from false [2022-07-21 17:47:17,661 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_2034) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,674 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_#t~mem10#1.base| v_ArrVal_2034) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,681 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_2034) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,691 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2034) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,699 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) (+ |c_ULTIMATE.start_dll_create_#res#1.offset| 4)) v_ArrVal_2034) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_dll_create_#res#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|))) is different from false [2022-07-21 17:47:17,706 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_2034) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,718 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_2034) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,728 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (v_ArrVal_2033 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2033))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_2034)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,745 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2035 Int) (v_ArrVal_2034 (Array Int Int)) (v_ArrVal_2033 (Array Int Int)) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|) (<= (+ (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2033))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_2034)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|))) is different from false [2022-07-21 17:47:17,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:17,755 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:17,756 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 57 treesize of output 48 [2022-07-21 17:47:17,759 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 312 treesize of output 292 [2022-07-21 17:47:17,769 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:17,770 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 300 treesize of output 282 [2022-07-21 17:47:17,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 312 [2022-07-21 17:47:17,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:17,792 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:17,793 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 352 treesize of output 336 [2022-07-21 17:47:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-21 17:47:18,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254696299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:47:18,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:47:18,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 54 [2022-07-21 17:47:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978662880] [2022-07-21 17:47:18,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:47:18,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 17:47:18,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:47:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 17:47:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1820, Unknown=10, NotChecked=950, Total=2970 [2022-07-21 17:47:18,374 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 55 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:27,166 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((v_ArrVal_2035 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (<= (+ (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| 0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_dll_update_at_~head#1.base|) (= (select .cse1 8) 0)))) is different from false [2022-07-21 17:47:27,454 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((v_ArrVal_2035 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_29| Int)) (or (<= (+ (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_29| v_ArrVal_2035) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_29|))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| 0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= (select .cse1 8) 0)))) is different from false [2022-07-21 17:47:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:47:27,769 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-07-21 17:47:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:47:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 17:47:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:47:27,770 INFO L225 Difference]: With dead ends: 61 [2022-07-21 17:47:27,770 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 17:47:27,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=343, Invalid=3115, Unknown=12, NotChecked=1500, Total=4970 [2022-07-21 17:47:27,772 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:47:27,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 394 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 594 Invalid, 0 Unknown, 610 Unchecked, 0.3s Time] [2022-07-21 17:47:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 17:47:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-21 17:47:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 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) [2022-07-21 17:47:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-21 17:47:27,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 48 [2022-07-21 17:47:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:47:27,774 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-21 17:47:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.2962962962962963) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:47:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-21 17:47:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:47:27,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:47:27,775 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:47:27,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-21 17:47:27,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 17:47:27,979 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 17:47:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:47:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1116795216, now seen corresponding path program 2 times [2022-07-21 17:47:27,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:47:27,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549448310] [2022-07-21 17:47:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:47:27,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:47:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:47:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:47:28,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549448310] [2022-07-21 17:47:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549448310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:47:28,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921424962] [2022-07-21 17:47:28,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:47:28,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:47:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:47:28,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:47:28,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 17:47:28,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:47:28,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:47:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-21 17:47:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:47:28,896 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 [2022-07-21 17:47:28,917 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 [2022-07-21 17:47:28,922 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 [2022-07-21 17:47:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:28,930 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 23 treesize of output 22 [2022-07-21 17:47:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:28,935 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 23 treesize of output 22 [2022-07-21 17:47:28,958 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:47:28,959 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 [2022-07-21 17:47:28,981 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 [2022-07-21 17:47:28,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 17:47:28,996 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 [2022-07-21 17:47:29,006 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 [2022-07-21 17:47:29,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:29,058 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 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-21 17:47:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:29,065 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 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-21 17:47:29,145 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:47:29,145 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 69 treesize of output 50 [2022-07-21 17:47:29,149 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 0 case distinctions, treesize of input 38 treesize of output 36 [2022-07-21 17:47:29,504 INFO L356 Elim1Store]: treesize reduction 84, result has 37.3 percent of original size [2022-07-21 17:47:29,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 88 [2022-07-21 17:47:29,558 INFO L356 Elim1Store]: treesize reduction 54, result has 51.8 percent of original size [2022-07-21 17:47:29,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 74 [2022-07-21 17:47:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:47:30,497 INFO L356 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-07-21 17:47:30,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 109 [2022-07-21 17:47:30,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2022-07-21 17:47:30,512 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:30,513 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 86 treesize of output 85 [2022-07-21 17:47:37,332 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-21 17:47:37,332 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 57 treesize of output 38 [2022-07-21 17:47:37,338 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:37,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-21 17:47:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:47:37,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:47:40,490 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse0 |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183)) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2185) (select (store (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))) 4) 0))))) is different from false [2022-07-21 17:47:40,567 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_#res#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) 4))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse0 |c_ULTIMATE.start_dll_create_#res#1.base| .cse1) (select .cse1 4)))) 4) 0)) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_#res#1.base|) 4))) (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183)) |c_ULTIMATE.start_dll_create_#res#1.base| v_ArrVal_2185) (select (store (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_#res#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))) 4) 0))))) is different from false [2022-07-21 17:47:40,641 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) 4))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) 4))) (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_2185) (select (store (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))) 4) 0))) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|))) is different from false [2022-07-21 17:47:40,756 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2185) (select (store (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))) 4) 0))) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|))) is different from false [2022-07-21 17:47:40,880 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_ArrVal_2177 Int) (v_ArrVal_2178 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2178)))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse6 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse6 v_ArrVal_2178)))) (let ((.cse5 (select (select .cse7 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse6 v_ArrVal_2177)))) (store .cse4 .cse5 (store (select .cse4 .cse5) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2185) (select (store (select (store .cse7 .cse5 (store (select .cse7 .cse5) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2177)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|))) is different from false [2022-07-21 17:47:41,957 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2173 Int) (v_ArrVal_2172 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_ArrVal_2177 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_2172)))) (store .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2177))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2178 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse4 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8)) (.cse5 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse5 v_ArrVal_2173)))) (store .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse4 v_ArrVal_2178))))) (let ((.cse2 (select (select .cse6 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (let ((.cse1 (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse5 v_ArrVal_2172)))) (store .cse3 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse4 v_ArrVal_2177))))) (store .cse1 .cse2 (store (select .cse1 .cse2) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2185) (select (store (select (store .cse6 .cse2 (store (select .cse6 .cse2) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0)) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2178 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse8 (let ((.cse10 (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_2173)))) (store .cse12 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2178))))) (let ((.cse11 (select (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store .cse10 .cse11 (store (select .cse10 .cse11) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)))))) (let ((.cse9 (store (select .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse9) (select .cse9 4)))) 4) 0))) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|))) is different from false [2022-07-21 17:47:44,381 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2172 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_ArrVal_2177 Int) (v_ArrVal_2169 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (not (<= v_ArrVal_2169 |c_ULTIMATE.start_dll_create_~head~0#1.offset|)) (and (forall ((v_ArrVal_2173 Int) (v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_ArrVal_2178 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (let ((.cse3 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8)) (.cse4 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse5 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse5 v_ArrVal_2173)))) (store .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse3 v_ArrVal_2178))))) (let ((.cse1 (select (select .cse6 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse4 v_ArrVal_2169) .cse5 v_ArrVal_2172)))) (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse3 v_ArrVal_2177))))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2185) (select (store (select (store .cse6 .cse1 (store (select .cse6 .cse1) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0)) (forall ((v_ArrVal_2173 Int) (v_ArrVal_2184 Int) (v_ArrVal_2178 Int) (v_ArrVal_2181 Int)) (= (select (let ((.cse8 (let ((.cse10 (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_2173)))) (store .cse12 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2178))))) (let ((.cse11 (select (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store .cse10 .cse11 (store (select .cse10 .cse11) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)))))) (let ((.cse9 (store (select .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184))) (select (store .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse9) (select .cse9 4)))) 4) 0))) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (< (select (select (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4) v_ArrVal_2169) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_2172)))) (store .cse13 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2177))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|))) is different from false [2022-07-21 17:47:44,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:44,420 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:44,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 234 [2022-07-21 17:47:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:44,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:44,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 502 treesize of output 279 [2022-07-21 17:47:44,543 INFO L356 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-07-21 17:47:44,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 542 treesize of output 498 [2022-07-21 17:47:44,979 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_arrayElimArr_15 (Array Int Int)) (v_ArrVal_2177 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (not (<= (select v_arrayElimArr_15 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.offset|)) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_15))) (store .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2177))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (and (forall ((v_arrayElimArr_14 (Array Int Int)) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_9 Int)) (or (= (select (let ((.cse1 (let ((.cse3 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_14))) (store .cse5 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_prenex_10))))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (store .cse3 .cse4 (store (select .cse3 .cse4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_prenex_11)))))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_prenex_9))) (select (store .cse1 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse2) (select .cse2 4)))) 4) 0) (not (= (select v_arrayElimArr_14 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_arrayElimArr_13 (Array Int Int)) (v_ArrVal_2178 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (or (= (select (let ((.cse9 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_13))) (store .cse11 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 v_ArrVal_2178))))) (let ((.cse7 (select (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) 4))) (select (store (let ((.cse6 (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_15))) (store .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 v_ArrVal_2177))))) (store .cse6 .cse7 (store (select .cse6 .cse7) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_ArrVal_2185) (select (store (select (store .cse10 .cse7 (store (select .cse10 .cse7) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0) (not (= (select v_arrayElimArr_13 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|))))))) is different from false [2022-07-21 17:47:46,054 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_arrayElimArr_15 (Array Int Int)) (v_ArrVal_2177 Int) (|v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 0)) (not (<= (select v_arrayElimArr_15 4) |c_ULTIMATE.start_dll_create_~head~0#1.offset|)) (and (forall ((v_arrayElimArr_14 (Array Int Int)) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_9 Int)) (or (not (= (select v_arrayElimArr_14 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (= (select (let ((.cse0 (let ((.cse2 (let ((.cse4 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_14))) (store .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_prenex_10))))) (let ((.cse3 (select (select .cse2 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_prenex_11)))))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_prenex_9))) (select (store .cse0 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| .cse1) (select .cse1 4)))) 4) 0))) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_arrayElimArr_13 (Array Int Int)) (v_ArrVal_2178 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (or (not (= (select v_arrayElimArr_13 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (= (select (let ((.cse8 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_13))) (store .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse8 v_ArrVal_2178))))) (let ((.cse6 (select (select .cse9 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4))) (select (store (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_15))) (store .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse8 v_ArrVal_2177))))) (store .cse5 .cse6 (store (select .cse5 .cse6) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_ArrVal_2185) (select (store (select (store .cse9 .cse6 (store (select .cse9 .cse6) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0)))) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (< (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_15))) (store .cse11 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) v_ArrVal_2177))) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|))) is different from false [2022-07-21 17:47:46,739 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_arrayElimArr_15 (Array Int Int)) (v_ArrVal_2177 Int) (|v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (and (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_arrayElimArr_13 (Array Int Int)) (v_ArrVal_2178 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (or (= (select (let ((.cse3 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_13))) (store .cse5 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse3 v_ArrVal_2178))))) (let ((.cse1 (select (select .cse4 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4))) (select (store (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_15))) (store .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse3 v_ArrVal_2177))))) (store .cse0 .cse1 (store (select .cse0 .cse1) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_ArrVal_2185) (select (store (select (store .cse4 .cse1 (store (select .cse4 .cse1) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0) (not (= (select v_arrayElimArr_13 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)))) (forall ((v_arrayElimArr_14 (Array Int Int)) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_9 Int)) (or (= (select (let ((.cse6 (let ((.cse8 (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_14))) (store .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_prenex_10))))) (let ((.cse9 (select (select .cse8 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4))) (store .cse8 .cse9 (store (select .cse8 .cse9) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_prenex_11)))))) (let ((.cse7 (store (select .cse6 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_prenex_9))) (select (store .cse6 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| .cse7) (select .cse7 4)))) 4) 0) (not (= (select v_arrayElimArr_14 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 0)) (not (<= (select v_arrayElimArr_15 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (< (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_15))) (store .cse11 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) v_ArrVal_2177))) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|))) is different from false [2022-07-21 17:47:48,121 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2162 Int) (v_ArrVal_2163 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_32| Int) (v_arrayElimArr_15 (Array Int Int)) (v_ArrVal_2177 Int) (|v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_33| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 0)) (not (<= (select v_arrayElimArr_15 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (< 0 |v_ULTIMATE.start_dll_update_at_~head#1.offset_32|) (< (select (select (let ((.cse1 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse0 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 v_ArrVal_2162)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_15))) (store .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 v_ArrVal_2177)))) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33|) (and (forall ((v_arrayElimArr_14 (Array Int Int)) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_9 Int)) (or (= (select (let ((.cse2 (let ((.cse4 (let ((.cse7 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse6 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse7 v_ArrVal_2163)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_14))) (store .cse6 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse7 v_prenex_10)))))) (let ((.cse5 (select (select .cse4 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4))) (store .cse4 .cse5 (store (select .cse4 .cse5) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_prenex_11)))))) (let ((.cse3 (store (select .cse2 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_prenex_9))) (select (store .cse2 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| .cse3) (select .cse3 4)))) 4) 0) (not (= (select v_arrayElimArr_14 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)))) (forall ((v_ArrVal_2184 Int) (v_ArrVal_2183 Int) (v_arrayElimArr_13 (Array Int Int)) (v_ArrVal_2178 Int) (v_ArrVal_2185 (Array Int Int)) (v_ArrVal_2181 Int)) (or (not (= (select v_arrayElimArr_13 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (= (select (let ((.cse11 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) (let ((.cse12 (let ((.cse13 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse11 v_ArrVal_2163)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_13))) (store .cse13 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse13 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse11 v_ArrVal_2178))))) (let ((.cse9 (select (select .cse12 |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) 4))) (select (store (let ((.cse8 (let ((.cse10 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse11 v_ArrVal_2162)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_arrayElimArr_15))) (store .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse11 v_ArrVal_2177))))) (store .cse8 .cse9 (store (select .cse8 .cse9) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2183))) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42| v_ArrVal_2185) (select (store (select (store .cse12 .cse9 (store (select .cse12 .cse9) |v_ULTIMATE.start_dll_update_at_~head#1.offset_33| v_ArrVal_2181)) |v_ULTIMATE.start_dll_create_~new_head~0#1.base_42|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_32| v_ArrVal_2184) 4))))) 4) 0)))))) is different from false [2022-07-21 17:47:48,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:48,148 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:47:48,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 417 treesize of output 258 [2022-07-21 17:47:48,254 INFO L356 Elim1Store]: treesize reduction 10, result has 76.7 percent of original size [2022-07-21 17:47:48,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23370 treesize of output 23137 [2022-07-21 17:47:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:47:48,335 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 57927 treesize of output 56109