./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:11:37,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:11:37,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:11:37,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:11:37,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:11:37,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:11:37,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:11:37,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:11:37,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:11:37,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:11:37,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:11:37,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:11:37,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:11:37,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:11:37,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:11:37,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:11:37,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:11:37,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:11:37,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:11:37,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:11:37,536 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:11:37,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:11:37,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:11:37,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:11:37,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:11:37,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:11:37,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:11:37,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:11:37,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:11:37,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:11:37,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:11:37,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:11:37,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:11:37,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:11:37,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:11:37,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:11:37,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:11:37,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:11:37,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:11:37,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:11:37,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:11:37,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:11:37,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:11:37,579 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:11:37,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:11:37,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:11:37,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:11:37,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:11:37,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:11:37,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:11:37,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:11:37,581 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:11:37,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:11:37,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:11:37,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:11:37,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:11:37,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:11:37,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:11:37,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:11:37,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:11:37,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:11:37,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:11:37,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:11:37,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:11:37,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:11:37,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:11:37,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:11:37,586 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:11:37,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:11:37,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:11:37,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2022-07-13 15:11:37,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:11:37,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:11:37,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:11:37,776 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:11:37,776 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:11:37,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2022-07-13 15:11:37,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498b21b24/b303ccd76ceb4b7dab7c5f2c6f3631b3/FLAGd146191c0 [2022-07-13 15:11:38,188 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:11:38,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2022-07-13 15:11:38,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498b21b24/b303ccd76ceb4b7dab7c5f2c6f3631b3/FLAGd146191c0 [2022-07-13 15:11:38,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498b21b24/b303ccd76ceb4b7dab7c5f2c6f3631b3 [2022-07-13 15:11:38,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:11:38,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:11:38,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:11:38,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:11:38,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:11:38,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@637e813f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38, skipping insertion in model container [2022-07-13 15:11:38,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:11:38,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:11:38,815 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/dll2c_prepend_equal.i[24640,24653] [2022-07-13 15:11:38,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:11:38,823 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:11:38,874 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/dll2c_prepend_equal.i[24640,24653] [2022-07-13 15:11:38,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:11:38,896 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:11:38,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38 WrapperNode [2022-07-13 15:11:38,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:11:38,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:11:38,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:11:38,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:11:38,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,961 INFO L137 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2022-07-13 15:11:38,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:11:38,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:11:38,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:11:38,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:11:38,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:38,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:39,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:39,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:11:39,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:11:39,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:11:39,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:11:39,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (1/1) ... [2022-07-13 15:11:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:11:39,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:11:39,029 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) [2022-07-13 15:11:39,033 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 [2022-07-13 15:11:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 15:11:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 15:11:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-13 15:11:39,079 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-13 15:11:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 15:11:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:11:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 15:11:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 15:11:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 15:11:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 15:11:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-13 15:11:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:11:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:11:39,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:11:39,179 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:11:39,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:11:39,373 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:11:39,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:11:39,378 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 15:11:39,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:11:39 BoogieIcfgContainer [2022-07-13 15:11:39,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:11:39,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:11:39,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:11:39,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:11:39,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:11:38" (1/3) ... [2022-07-13 15:11:39,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:11:39, skipping insertion in model container [2022-07-13 15:11:39,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:38" (2/3) ... [2022-07-13 15:11:39,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:11:39, skipping insertion in model container [2022-07-13 15:11:39,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:11:39" (3/3) ... [2022-07-13 15:11:39,385 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2022-07-13 15:11:39,394 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:11:39,395 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:11:39,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:11:39,445 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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@62b51f1a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e29146a [2022-07-13 15:11:39,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:11:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 15:11:39,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:39,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:39,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 976010426, now seen corresponding path program 1 times [2022-07-13 15:11:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:11:39,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613642305] [2022-07-13 15:11:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:11:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:39,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:11:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:39,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 15:11:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 15:11:39,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:11:39,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613642305] [2022-07-13 15:11:39,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613642305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:11:39,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:11:39,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:11:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108912503] [2022-07-13 15:11:39,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:11:39,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:11:39,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:11:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:11:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:11:39,796 INFO L87 Difference]: Start difference. First operand has 35 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:11:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:11:39,892 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2022-07-13 15:11:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:11:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-07-13 15:11:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:11:39,899 INFO L225 Difference]: With dead ends: 61 [2022-07-13 15:11:39,899 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 15:11:39,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:11:39,905 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:11:39,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:11:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 15:11:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 15:11:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-13 15:11:39,940 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 24 [2022-07-13 15:11:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:11:39,941 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-13 15:11:39,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:11:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-13 15:11:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 15:11:39,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:39,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:39,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:11:39,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1442307826, now seen corresponding path program 1 times [2022-07-13 15:11:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:11:39,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472113499] [2022-07-13 15:11:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:11:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:11:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 15:11:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 15:11:40,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:11:40,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472113499] [2022-07-13 15:11:40,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472113499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:11:40,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:11:40,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 15:11:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185966698] [2022-07-13 15:11:40,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:11:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:11:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:11:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:11:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:11:40,056 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:11:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:11:40,108 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-07-13 15:11:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:11:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-07-13 15:11:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:11:40,125 INFO L225 Difference]: With dead ends: 50 [2022-07-13 15:11:40,125 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 15:11:40,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:11:40,130 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:11:40,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:11:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 15:11:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-07-13 15:11:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-13 15:11:40,140 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2022-07-13 15:11:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:11:40,142 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-13 15:11:40,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:11:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-13 15:11:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 15:11:40,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:40,145 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:11:40,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash 915772386, now seen corresponding path program 1 times [2022-07-13 15:11:40,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:11:40,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581490918] [2022-07-13 15:11:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:11:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:11:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:11:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 15:11:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:11:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:11:40,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581490918] [2022-07-13 15:11:40,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581490918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:11:40,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578862738] [2022-07-13 15:11:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:40,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:11:40,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:11:40,528 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) [2022-07-13 15:11:40,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:11:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 15:11:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:40,948 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 9 treesize of output 5 [2022-07-13 15:11:41,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:41,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-13 15:11:41,070 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 25 treesize of output 13 [2022-07-13 15:11:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:11:41,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:11:41,158 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base_8| Int) (v_ArrVal_452 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base_8| v_ArrVal_452) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (or (not (< |v_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base_8| |c_#StackHeapBarrier|)) (<= (+ 1 .cse0) 0) (<= 1 .cse0)))) is different from false [2022-07-13 15:11:41,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578862738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:11:41,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:11:41,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-07-13 15:11:41,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602499009] [2022-07-13 15:11:41,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:11:41,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 15:11:41,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:11:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 15:11:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2022-07-13 15:11:41,162 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 19 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 15:11:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:11:41,566 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-07-13 15:11:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:11:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 19 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-07-13 15:11:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:11:41,568 INFO L225 Difference]: With dead ends: 37 [2022-07-13 15:11:41,568 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 15:11:41,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=920, Unknown=1, NotChecked=62, Total=1122 [2022-07-13 15:11:41,570 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:11:41,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 219 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 186 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-07-13 15:11:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 15:11:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-13 15:11:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-13 15:11:41,574 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 34 [2022-07-13 15:11:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:11:41,574 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-13 15:11:41,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 19 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 15:11:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-13 15:11:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 15:11:41,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:41,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:41,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:11:41,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:11:41,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:41,797 INFO L85 PathProgramCache]: Analyzing trace with hash 917619428, now seen corresponding path program 1 times [2022-07-13 15:11:41,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:11:41,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712813599] [2022-07-13 15:11:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:41,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:11:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:42,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 15:11:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:11:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:42,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 15:11:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:11:42,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:11:42,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712813599] [2022-07-13 15:11:42,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712813599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:11:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582161534] [2022-07-13 15:11:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:42,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:11:42,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:11:42,636 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) [2022-07-13 15:11:42,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:11:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:42,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-13 15:11:42,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:42,905 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 [2022-07-13 15:11:42,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-13 15:11:43,034 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 15:11:43,035 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 [2022-07-13 15:11:43,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 15:11:43,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:43,243 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-13 15:11:43,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-07-13 15:11:43,436 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-13 15:11:43,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-13 15:11:43,443 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 8 treesize of output 7 [2022-07-13 15:11:43,448 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 12 treesize of output 11 [2022-07-13 15:11:43,548 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-07-13 15:11:43,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 41 [2022-07-13 15:11:43,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-07-13 15:11:43,856 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-13 15:11:43,856 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 131 [2022-07-13 15:11:43,861 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 115 treesize of output 101 [2022-07-13 15:11:43,867 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-07-13 15:11:43,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 94 [2022-07-13 15:11:43,871 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 7 treesize of output 3 [2022-07-13 15:11:43,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-13 15:11:43,966 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 [2022-07-13 15:11:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:44,045 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 [2022-07-13 15:11:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:44,070 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-13 15:11:44,070 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 145 [2022-07-13 15:11:44,075 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-13 15:11:44,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:11:44,288 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,SelfDestructingSolverStorable3 [2022-07-13 15:11:44,289 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:164) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:764) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:725) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:643) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:335) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:176) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-13 15:11:44,292 INFO L158 Benchmark]: Toolchain (without parser) took 5707.05ms. Allocated memory was 142.6MB in the beginning and 180.4MB in the end (delta: 37.7MB). Free memory was 109.3MB in the beginning and 59.1MB in the end (delta: 50.2MB). Peak memory consumption was 87.4MB. Max. memory is 16.1GB. [2022-07-13 15:11:44,293 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory was 41.2MB in the beginning and 41.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 15:11:44,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.86ms. Allocated memory is still 142.6MB. Free memory was 108.7MB in the beginning and 108.7MB in the end (delta: -4.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:11:44,293 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.46ms. Allocated memory is still 142.6MB. Free memory was 108.7MB in the beginning and 106.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:11:44,293 INFO L158 Benchmark]: Boogie Preprocessor took 33.00ms. Allocated memory is still 142.6MB. Free memory was 106.4MB in the beginning and 104.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:11:44,294 INFO L158 Benchmark]: RCFGBuilder took 376.43ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 87.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-07-13 15:11:44,294 INFO L158 Benchmark]: TraceAbstraction took 4911.73ms. Allocated memory was 142.6MB in the beginning and 180.4MB in the end (delta: 37.7MB). Free memory was 86.9MB in the beginning and 59.1MB in the end (delta: 27.8MB). Peak memory consumption was 66.8MB. Max. memory is 16.1GB. [2022-07-13 15:11:44,295 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory was 41.2MB in the beginning and 41.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.86ms. Allocated memory is still 142.6MB. Free memory was 108.7MB in the beginning and 108.7MB in the end (delta: -4.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.46ms. Allocated memory is still 142.6MB. Free memory was 108.7MB in the beginning and 106.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.00ms. Allocated memory is still 142.6MB. Free memory was 106.4MB in the beginning and 104.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.43ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 87.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4911.73ms. Allocated memory was 142.6MB in the beginning and 180.4MB in the end (delta: 37.7MB). Free memory was 86.9MB in the beginning and 59.1MB in the end (delta: 27.8MB). Peak memory consumption was 66.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:113) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-13 15:11:44,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:11:45,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:11:45,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:11:46,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:11:46,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:11:46,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:11:46,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:11:46,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:11:46,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:11:46,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:11:46,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:11:46,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:11:46,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:11:46,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:11:46,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:11:46,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:11:46,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:11:46,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:11:46,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:11:46,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:11:46,033 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:11:46,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:11:46,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:11:46,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:11:46,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:11:46,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:11:46,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:11:46,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:11:46,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:11:46,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:11:46,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:11:46,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:11:46,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:11:46,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:11:46,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:11:46,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:11:46,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:11:46,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:11:46,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:11:46,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:11:46,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:11:46,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:11:46,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 15:11:46,086 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:11:46,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:11:46,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:11:46,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:11:46,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:11:46,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:11:46,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:11:46,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:11:46,088 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:11:46,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:11:46,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:11:46,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:11:46,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:11:46,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:11:46,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:11:46,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:11:46,090 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 15:11:46,090 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 15:11:46,090 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 15:11:46,090 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:11:46,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:11:46,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:11:46,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:11:46,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:11:46,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:11:46,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:11:46,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:11:46,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:11:46,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:11:46,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:11:46,092 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 15:11:46,092 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 15:11:46,092 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:11:46,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:11:46,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:11:46,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 15:11:46,093 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e4fff172a515598d076941b225a1a1f31b97f5ac14127a866784b10a4e3537 [2022-07-13 15:11:46,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:11:46,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:11:46,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:11:46,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:11:46,380 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:11:46,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2022-07-13 15:11:46,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79501b118/aa358a1675d24365b20da993e7cec2d3/FLAG1b9c7e1a0 [2022-07-13 15:11:46,772 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:11:46,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2022-07-13 15:11:46,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79501b118/aa358a1675d24365b20da993e7cec2d3/FLAG1b9c7e1a0 [2022-07-13 15:11:47,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79501b118/aa358a1675d24365b20da993e7cec2d3 [2022-07-13 15:11:47,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:11:47,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:11:47,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:11:47,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:11:47,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:11:47,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589479b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47, skipping insertion in model container [2022-07-13 15:11:47,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:11:47,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:11:47,491 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/dll2c_prepend_equal.i[24640,24653] [2022-07-13 15:11:47,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:11:47,509 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:11:47,555 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/dll2c_prepend_equal.i[24640,24653] [2022-07-13 15:11:47,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:11:47,580 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:11:47,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47 WrapperNode [2022-07-13 15:11:47,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:11:47,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:11:47,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:11:47,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:11:47,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,637 INFO L137 Inliner]: procedures = 130, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2022-07-13 15:11:47,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:11:47,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:11:47,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:11:47,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:11:47,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:11:47,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:11:47,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:11:47,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:11:47,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (1/1) ... [2022-07-13 15:11:47,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:11:47,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:11:47,708 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) [2022-07-13 15:11:47,738 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 [2022-07-13 15:11:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-13 15:11:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-13 15:11:47,749 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-13 15:11:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 15:11:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:11:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 15:11:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 15:11:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 15:11:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 15:11:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-13 15:11:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-13 15:11:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 15:11:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:11:47,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:11:47,840 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:11:47,841 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:11:48,146 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:11:48,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:11:48,151 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 15:11:48,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:11:48 BoogieIcfgContainer [2022-07-13 15:11:48,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:11:48,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:11:48,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:11:48,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:11:48,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:11:47" (1/3) ... [2022-07-13 15:11:48,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e6d227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:11:48, skipping insertion in model container [2022-07-13 15:11:48,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:11:47" (2/3) ... [2022-07-13 15:11:48,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e6d227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:11:48, skipping insertion in model container [2022-07-13 15:11:48,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:11:48" (3/3) ... [2022-07-13 15:11:48,157 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2022-07-13 15:11:48,165 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:11:48,166 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:11:48,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:11:48,224 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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@3c5cfe1d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@751e418b [2022-07-13 15:11:48,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:11:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 15:11:48,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:48,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:48,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash 976010426, now seen corresponding path program 1 times [2022-07-13 15:11:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 15:11:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551289382] [2022-07-13 15:11:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 15:11:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 15:11:48,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 15:11:48,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 15:11:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 15:11:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 15:11:48,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:11:48,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 15:11:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551289382] [2022-07-13 15:11:48,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551289382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:11:48,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:11:48,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:11:48,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582956318] [2022-07-13 15:11:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:11:48,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:11:48,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 15:11:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:11:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:11:48,512 INFO L87 Difference]: Start difference. First operand has 35 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:11:48,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:11:48,533 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2022-07-13 15:11:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:11:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-13 15:11:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:11:48,539 INFO L225 Difference]: With dead ends: 61 [2022-07-13 15:11:48,540 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 15:11:48,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:11:48,548 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:11:48,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:11:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 15:11:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 15:11:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-13 15:11:48,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 24 [2022-07-13 15:11:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:11:48,576 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-13 15:11:48,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:11:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-13 15:11:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 15:11:48,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:48,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:48,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:11:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 15:11:48,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1442307826, now seen corresponding path program 1 times [2022-07-13 15:11:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 15:11:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648668263] [2022-07-13 15:11:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:48,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 15:11:48,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 15:11:48,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 15:11:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 15:11:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 15:11:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:11:48,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:11:48,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 15:11:48,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648668263] [2022-07-13 15:11:48,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648668263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:11:48,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:11:48,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:11:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30798405] [2022-07-13 15:11:48,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:11:48,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:11:48,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 15:11:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:11:48,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:11:48,967 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:11:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:11:48,976 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-07-13 15:11:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:11:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-07-13 15:11:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:11:48,978 INFO L225 Difference]: With dead ends: 50 [2022-07-13 15:11:48,978 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 15:11:48,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:11:48,979 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 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 [2022-07-13 15:11:48,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:11:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 15:11:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-07-13 15:11:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-13 15:11:48,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 24 [2022-07-13 15:11:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:11:48,985 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-13 15:11:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:11:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-13 15:11:48,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 15:11:48,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:48,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:48,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:11:49,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 15:11:49,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash 915772386, now seen corresponding path program 1 times [2022-07-13 15:11:49,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 15:11:49,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744341168] [2022-07-13 15:11:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:49,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 15:11:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 15:11:49,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 15:11:49,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 15:11:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 15:11:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:49,595 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 8 treesize of output 4 [2022-07-13 15:11:49,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:49,707 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 15 treesize of output 17 [2022-07-13 15:11:49,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-13 15:11:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:11:49,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:11:49,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 15:11:49,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744341168] [2022-07-13 15:11:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744341168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:11:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1538604312] [2022-07-13 15:11:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-13 15:11:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-13 15:11:49,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-13 15:11:49,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-07-13 15:11:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 15:11:50,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:50,424 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 8 treesize of output 4 [2022-07-13 15:11:50,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:50,484 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 15 treesize of output 17 [2022-07-13 15:11:50,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-13 15:11:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:11:50,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:11:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1538604312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:11:50,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:11:50,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2022-07-13 15:11:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878972324] [2022-07-13 15:11:50,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 15:11:50,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 15:11:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 15:11:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 15:11:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=501, Unknown=9, NotChecked=0, Total=600 [2022-07-13 15:11:50,610 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 15:11:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:11:51,321 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-07-13 15:11:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:11:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-07-13 15:11:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:11:51,323 INFO L225 Difference]: With dead ends: 37 [2022-07-13 15:11:51,323 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 15:11:51,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=720, Unknown=10, NotChecked=0, Total=870 [2022-07-13 15:11:51,324 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:11:51,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-07-13 15:11:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 15:11:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-13 15:11:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 15:11:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-13 15:11:51,328 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 34 [2022-07-13 15:11:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:11:51,329 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-13 15:11:51,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 15:11:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-13 15:11:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 15:11:51,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:11:51,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:11:51,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:11:51,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-13 15:11:51,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 15:11:51,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:11:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:11:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash 917619428, now seen corresponding path program 1 times [2022-07-13 15:11:51,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 15:11:51,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461081924] [2022-07-13 15:11:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:11:51,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 15:11:51,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 15:11:51,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 15:11:51,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 15:11:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:11:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 171 conjunts are in the unsatisfiable core [2022-07-13 15:11:52,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:11:52,184 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 [2022-07-13 15:11:52,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-13 15:11:52,328 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 15:11:52,329 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 24 [2022-07-13 15:11:52,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 15:11:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:52,569 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-13 15:11:52,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 34 [2022-07-13 15:11:52,831 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 9 treesize of output 11 [2022-07-13 15:11:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:52,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-13 15:11:52,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-07-13 15:11:53,010 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 15:11:53,010 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2022-07-13 15:11:53,018 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 7 treesize of output 3 [2022-07-13 15:11:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:53,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-07-13 15:11:53,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 15:11:53,334 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-13 15:11:53,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-13 15:11:53,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-13 15:11:53,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:53,376 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-13 15:11:53,376 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 2 case distinctions, treesize of input 66 treesize of output 56 [2022-07-13 15:11:53,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:53,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:53,436 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-13 15:11:53,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-07-13 15:11:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,436 INFO L244 Elim1Store]: Index analysis took 191 ms [2022-07-13 15:11:54,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-07-13 15:11:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,566 INFO L356 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2022-07-13 15:11:54,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 307 treesize of output 153 [2022-07-13 15:11:54,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:11:54,621 INFO L356 Elim1Store]: treesize reduction 66, result has 14.3 percent of original size [2022-07-13 15:11:54,621 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 89 [2022-07-13 15:11:54,687 INFO L356 Elim1Store]: treesize reduction 82, result has 16.3 percent of original size [2022-07-13 15:11:54,688 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 130 [2022-07-13 15:11:54,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 37 [2022-07-13 15:11:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 68 [2022-07-13 15:11:54,746 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 65 treesize of output 53 [2022-07-13 15:11:54,764 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 32 treesize of output 26 [2022-07-13 15:11:54,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-07-13 15:11:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:11:54,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-13 15:11:55,040 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 15 treesize of output 7 [2022-07-13 15:11:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:11:55,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:11:55,704 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_596 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_620 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_587 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_624 (_ BitVec 32)) (v_ArrVal_615 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_631 (_ BitVec 32)) (v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_3| (_ BitVec 32)) (v_ArrVal_603 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse12 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse11 (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse7 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse5 (bvadd (_ bv4 32) .cse11))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) .cse5))) (select (select (let ((.cse0 (store (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| v_ArrVal_615))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| v_ArrVal_624))) .cse2 v_ArrVal_618) .cse3 v_ArrVal_620))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) v_ArrVal_631))) (select (select (store (store (let ((.cse4 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)))) (store .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse6 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse2))))) (store .cse4 .cse2 (store (select .cse4 .cse2) .cse5 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))) .cse3 v_ArrVal_587) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_603) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv8 32) (select (select (store (let ((.cse8 (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)))) (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| .cse11))))) (store .cse9 .cse2 (store (select .cse9 .cse2) .cse5 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))))) (store .cse8 .cse3 (store (select .cse8 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_3| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|))) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_596) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))) is different from false [2022-07-13 15:11:56,121 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_596 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_620 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_587 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_624 (_ BitVec 32)) (v_ArrVal_615 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_631 (_ BitVec 32)) (v_ArrVal_618 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_3| (_ BitVec 32)) (v_ArrVal_603 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse12 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse11 (select .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse7 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (select .cse7 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse5 (bvadd (_ bv4 32) .cse11))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) .cse5))) (select (select (let ((.cse0 (store (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| v_ArrVal_615))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| v_ArrVal_624))) .cse2 v_ArrVal_618) .cse3 v_ArrVal_620))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|) v_ArrVal_631))) (select (select (store (store (let ((.cse4 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse7 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|)))) (store .cse6 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse6 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| .cse2))))) (store .cse4 .cse2 (store (select .cse4 .cse2) .cse5 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|))) .cse3 v_ArrVal_587) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_603) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (select (select (store (let ((.cse8 (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)))) (store .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| .cse11))))) (store .cse9 .cse2 (store (select .cse9 .cse2) .cse5 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|))))) (store .cse8 .cse3 (store (select .cse8 .cse3) |v_ULTIMATE.start_dll_circular_prepend_~last~1#1.offset_3| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|))) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_596) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv8 32))))))))) is different from false [2022-07-13 15:11:56,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:11:56,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 594 treesize of output 571 [2022-07-13 15:11:56,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:11:56,907 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 4586426 treesize of output 4550838 [2022-07-13 15:11:57,617 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 6096914 treesize of output 4795666 [2022-07-13 15:11:58,378 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 4950290 treesize of output 4605842 [2022-07-13 15:11:59,114 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 5138130 treesize of output 4961122