./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_unequal.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 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:55:56,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:55:56,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:55:56,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:55:56,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:55:56,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:55:56,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:55:56,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:55:56,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:55:56,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:55:56,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:55:56,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:55:56,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:55:56,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:55:56,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:55:56,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:55:56,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:55:56,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:55:56,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:55:56,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:55:56,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:55:56,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:55:56,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:55:56,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:55:56,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:55:56,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:55:56,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:55:56,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:55:56,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:55:56,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:55:56,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:55:56,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:55:56,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:55:56,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:55:56,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:55:56,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:55:56,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:55:56,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:55:56,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:55:56,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:55:56,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:55:56,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:55:56,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:55:56,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:55:56,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:55:56,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:55:56,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:55:56,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:55:56,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:55:56,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:55:56,853 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:55:56,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:55:56,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:55:56,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:55:56,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:55:56,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:55:56,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:55:56,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:55:56,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:55:56,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:55:56,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:55:56,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:55:56,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 [2021-12-15 23:55:57,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:55:57,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:55:57,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:55:57,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:55:57,092 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:55:57,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2021-12-15 23:55:57,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4700a17/a5798543413a4b3d8f5f99ca26498eab/FLAGa1cb58804 [2021-12-15 23:55:57,558 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:55:57,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2021-12-15 23:55:57,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4700a17/a5798543413a4b3d8f5f99ca26498eab/FLAGa1cb58804 [2021-12-15 23:55:57,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4700a17/a5798543413a4b3d8f5f99ca26498eab [2021-12-15 23:55:57,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:55:57,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:55:57,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:55:57,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:55:57,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:55:57,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:55:57" (1/1) ... [2021-12-15 23:55:57,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6fe951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:57, skipping insertion in model container [2021-12-15 23:55:57,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:55:57" (1/1) ... [2021-12-15 23:55:57,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:55:57,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:55:58,241 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_unequal.i[24729,24742] [2021-12-15 23:55:58,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:55:58,255 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:55:58,291 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_unequal.i[24729,24742] [2021-12-15 23:55:58,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:55:58,312 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:55:58,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58 WrapperNode [2021-12-15 23:55:58,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:55:58,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:55:58,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:55:58,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:55:58,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,372 INFO L137 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2021-12-15 23:55:58,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:55:58,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:55:58,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:55:58,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:55:58,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:55:58,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:55:58,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:55:58,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:55:58,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (1/1) ... [2021-12-15 23:55:58,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:55:58,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:55:58,472 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) [2021-12-15 23:55:58,492 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 [2021-12-15 23:55:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 23:55:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 23:55:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-15 23:55:58,508 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-15 23:55:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:55:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:55:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 23:55:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:55:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:55:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:55:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 23:55:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:55:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:55:58,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:55:58,613 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:55:58,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:55:58,892 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:55:58,905 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:55:58,905 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 23:55:58,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:55:58 BoogieIcfgContainer [2021-12-15 23:55:58,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:55:58,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:55:58,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:55:58,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:55:58,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:55:57" (1/3) ... [2021-12-15 23:55:58,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc622e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:55:58, skipping insertion in model container [2021-12-15 23:55:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:55:58" (2/3) ... [2021-12-15 23:55:58,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc622e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:55:58, skipping insertion in model container [2021-12-15 23:55:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:55:58" (3/3) ... [2021-12-15 23:55:58,920 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2021-12-15 23:55:58,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:55:58,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:55:58,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:55:58,994 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:55:58,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:55:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 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) [2021-12-15 23:55:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 23:55:59,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:55:59,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:55:59,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:55:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:55:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1640936773, now seen corresponding path program 1 times [2021-12-15 23:55:59,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:55:59,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033255228] [2021-12-15 23:55:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:55:59,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:55:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:55:59,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:55:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:55:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:55:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:55:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 23:55:59,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:55:59,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033255228] [2021-12-15 23:55:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033255228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:55:59,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:55:59,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:55:59,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217527900] [2021-12-15 23:55:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:55:59,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:55:59,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:55:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:55:59,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:55:59,412 INFO L87 Difference]: Start difference. First operand has 36 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-12-15 23:55:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:55:59,534 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2021-12-15 23:55:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:55:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 23 [2021-12-15 23:55:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:55:59,545 INFO L225 Difference]: With dead ends: 63 [2021-12-15 23:55:59,545 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 23:55:59,548 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:55:59,551 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:55:59,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 23:55:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 23:55:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-15 23:55:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-12-15 23:55:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-12-15 23:55:59,592 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 23 [2021-12-15 23:55:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:55:59,594 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-12-15 23:55:59,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-12-15 23:55:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-12-15 23:55:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 23:55:59,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:55:59,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:55:59,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:55:59,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:55:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:55:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -376735694, now seen corresponding path program 1 times [2021-12-15 23:55:59,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:55:59,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063679235] [2021-12-15 23:55:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:55:59,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:55:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:55:59,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:55:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:55:59,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:55:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:55:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 23:55:59,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:55:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063679235] [2021-12-15 23:55:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063679235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:55:59,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:55:59,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:55:59,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789865821] [2021-12-15 23:55:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:55:59,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:55:59,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:55:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:55:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:55:59,700 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-12-15 23:55:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:55:59,769 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2021-12-15 23:55:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:55:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 23 [2021-12-15 23:55:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:55:59,771 INFO L225 Difference]: With dead ends: 52 [2021-12-15 23:55:59,771 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 23:55:59,772 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:55:59,773 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:55:59,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 23:55:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 23:55:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-12-15 23:55:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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) [2021-12-15 23:55:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-15 23:55:59,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-12-15 23:55:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:55:59,781 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-15 23:55:59,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-12-15 23:55:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-15 23:55:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 23:55:59,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:55:59,782 INFO L514 BasicCegarLoop]: 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] [2021-12-15 23:55:59,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:55:59,783 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:55:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:55:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 900211966, now seen corresponding path program 1 times [2021-12-15 23:55:59,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:55:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931212662] [2021-12-15 23:55:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:55:59,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:55:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:00,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-15 23:56:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:56:00,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931212662] [2021-12-15 23:56:00,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931212662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:56:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327735754] [2021-12-15 23:56:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:00,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:00,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:56:00,175 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) [2021-12-15 23:56:00,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:56:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:00,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 23:56:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:56:00,684 INFO L388 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 [2021-12-15 23:56:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:00,808 INFO L388 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 [2021-12-15 23:56:00,850 INFO L388 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 [2021-12-15 23:56:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:56:00,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:56:00,978 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base_9| Int) (v_ArrVal_452 (Array Int Int))) (or (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base_9| v_ArrVal_452) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base_9|))) is different from false [2021-12-15 23:56:00,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327735754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:56:00,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:56:00,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-12-15 23:56:00,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331036257] [2021-12-15 23:56:00,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:56:00,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 23:56:00,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:56:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 23:56:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2021-12-15 23:56:00,984 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 25 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 19 states have internal predecessors, (43), 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) [2021-12-15 23:56:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:56:01,595 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-12-15 23:56:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 23:56:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 19 states have internal predecessors, (43), 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 33 [2021-12-15 23:56:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:56:01,598 INFO L225 Difference]: With dead ends: 39 [2021-12-15 23:56:01,598 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 23:56:01,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=920, Unknown=1, NotChecked=62, Total=1122 [2021-12-15 23:56:01,600 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:56:01,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 272 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2021-12-15 23:56:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 23:56:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-15 23:56:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-12-15 23:56:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-12-15 23:56:01,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2021-12-15 23:56:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:56:01,606 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-12-15 23:56:01,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 19 states have internal predecessors, (43), 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) [2021-12-15 23:56:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-12-15 23:56:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 23:56:01,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:56:01,608 INFO L514 BasicCegarLoop]: 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] [2021-12-15 23:56:01,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:56:01,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:01,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:56:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:56:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 900271548, now seen corresponding path program 1 times [2021-12-15 23:56:01,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:56:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918193824] [2021-12-15 23:56:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:01,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:56:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:02,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:56:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:56:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-15 23:56:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:56:02,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:56:02,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918193824] [2021-12-15 23:56:02,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918193824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:56:02,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826995786] [2021-12-15 23:56:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:56:02,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:56:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:56:02,812 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) [2021-12-15 23:56:02,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:56:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:56:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-15 23:56:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:56:03,024 INFO L388 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 [2021-12-15 23:56:03,060 INFO L388 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 [2021-12-15 23:56:03,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:03,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-15 23:56:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:03,290 INFO L388 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 [2021-12-15 23:56:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:03,415 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-15 23:56:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-15 23:56:03,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:03,680 INFO L388 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 [2021-12-15 23:56:03,690 INFO L388 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 [2021-12-15 23:56:03,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 25 [2021-12-15 23:56:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:03,893 INFO L388 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 16 treesize of output 10 [2021-12-15 23:56:03,898 INFO L388 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 [2021-12-15 23:56:03,988 INFO L388 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 [2021-12-15 23:56:04,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,129 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:56:04,129 INFO L388 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 [2021-12-15 23:56:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,153 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-15 23:56:04,154 INFO L388 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 33 treesize of output 33 [2021-12-15 23:56:04,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 23:56:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,406 INFO L388 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 [2021-12-15 23:56:04,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 77 [2021-12-15 23:56:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:56:04,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2021-12-15 23:56:04,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:04,441 INFO L388 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 54 [2021-12-15 23:56:04,481 INFO L354 Elim1Store]: treesize reduction 74, result has 17.8 percent of original size [2021-12-15 23:56:04,482 INFO L388 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 78 [2021-12-15 23:56:04,489 INFO L388 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 [2021-12-15 23:56:04,493 INFO L388 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 18 treesize of output 14 [2021-12-15 23:56:04,549 INFO L388 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 38 treesize of output 26 [2021-12-15 23:56:04,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 23:56:04,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-12-15 23:56:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:56:04,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:56:04,634 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_936 Int) (v_ArrVal_951 (Array Int Int)) (v_ArrVal_940 (Array Int Int)) (v_ArrVal_953 (Array Int Int)) (v_ArrVal_950 Int) (v_ArrVal_941 (Array Int Int)) (v_ArrVal_944 (Array Int Int)) (v_ArrVal_954 (Array Int Int)) (v_ArrVal_943 (Array Int Int)) (v_ArrVal_946 (Array Int Int)) (v_ArrVal_959 (Array Int Int)) (v_ArrVal_958 (Array Int Int)) (v_ArrVal_947 (Array Int Int))) (= (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse5 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) (+ (select .cse5 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|) 4)))) (select (select (let ((.cse0 (store (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| v_ArrVal_959))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| v_ArrVal_950))) .cse2 v_ArrVal_944) .cse3 v_ArrVal_954))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_936))) (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_951) .cse2 v_ArrVal_946) .cse3 v_ArrVal_953) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_958) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse5 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_941) .cse2 v_ArrVal_947) .cse3 v_ArrVal_943) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_940) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))))) |c_ULTIMATE.start_main_~uneq~0#1|)) is different from false [2021-12-15 23:56:04,657 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_936 Int) (v_ArrVal_951 (Array Int Int)) (v_ArrVal_940 (Array Int Int)) (v_ArrVal_953 (Array Int Int)) (v_ArrVal_950 Int) (v_ArrVal_941 (Array Int Int)) (v_ArrVal_944 (Array Int Int)) (v_ArrVal_954 (Array Int Int)) (v_ArrVal_943 (Array Int Int)) (v_ArrVal_946 (Array Int Int)) (v_ArrVal_959 (Array Int Int)) (v_ArrVal_958 (Array Int Int)) (v_ArrVal_947 (Array Int Int))) (= (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (.cse5 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) (+ (select .cse5 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|) 4)))) (select (select (let ((.cse0 (store (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| v_ArrVal_959))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| v_ArrVal_950))) .cse2 v_ArrVal_944) .cse3 v_ArrVal_954))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset| 4) v_ArrVal_936))) (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_951) .cse2 v_ArrVal_946) .cse3 v_ArrVal_953) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_958) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~head#1.base| (store .cse5 |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset| |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.offset|)) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_941) .cse2 v_ArrVal_947) .cse3 v_ArrVal_943) |c_ULTIMATE.start_dll_circular_prepend_#t~ret9#1.base| v_ArrVal_940) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))))) |c_ULTIMATE.start_main_~uneq~0#1|)) is different from false [2021-12-15 23:56:04,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:04,772 INFO L388 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 269 treesize of output 246 [2021-12-15 23:56:04,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 23:56:04,861 INFO L388 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 1747228 treesize of output 1728542 [2021-12-15 23:56:06,048 INFO L388 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 2037204 treesize of output 1758676 [2021-12-15 23:56:07,300 INFO L388 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 1827284 treesize of output 1728980 [2021-12-15 23:56:08,345 INFO L388 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 1845524 treesize of output 1806612