./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/sll2c_append_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/sll2c_append_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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:57:38,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:57:38,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:57:38,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:57:38,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:57:38,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:57:38,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:57:38,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:57:38,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:57:38,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:57:38,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:57:38,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:57:38,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:57:38,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:57:38,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:57:38,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:57:38,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:57:38,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:57:38,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:57:38,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:57:38,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:57:38,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:57:38,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:57:38,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:57:38,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:57:38,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:57:38,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:57:38,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:57:38,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:57:38,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:57:38,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:57:38,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:57:38,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:57:38,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:57:38,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:57:38,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:57:38,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:57:38,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:57:38,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:57:38,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:57:38,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:57:38,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:57:38,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:57:39,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:57:39,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:57:39,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:57:39,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:57:39,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:57:39,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:57:39,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:57:39,003 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:57:39,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:57:39,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:57:39,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:57:39,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:57:39,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:57:39,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:57:39,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:57:39,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:57:39,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:57:39,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:57:39,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:57:39,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:57:39,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:57:39,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:57:39,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:57:39,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:57:39,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:57:39,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:57:39,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:57:39,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2021-12-15 23:57:39,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:57:39,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:57:39,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:57:39,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:57:39,238 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:57:39,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-12-15 23:57:39,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3aa02724/08e3887a054c45618ef55e30eb8ca9a6/FLAGd2d8127e5 [2021-12-15 23:57:39,616 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:57:39,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-12-15 23:57:39,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3aa02724/08e3887a054c45618ef55e30eb8ca9a6/FLAGd2d8127e5 [2021-12-15 23:57:40,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3aa02724/08e3887a054c45618ef55e30eb8ca9a6 [2021-12-15 23:57:40,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:57:40,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:57:40,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:57:40,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:57:40,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:57:40,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c3e1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40, skipping insertion in model container [2021-12-15 23:57:40,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:57:40,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:57:40,299 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/sll2c_append_unequal.i[24587,24600] [2021-12-15 23:57:40,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:57:40,314 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:57:40,369 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/sll2c_append_unequal.i[24587,24600] [2021-12-15 23:57:40,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:57:40,393 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:57:40,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40 WrapperNode [2021-12-15 23:57:40,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:57:40,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:57:40,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:57:40,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:57:40,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,443 INFO L137 Inliner]: procedures = 127, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 158 [2021-12-15 23:57:40,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:57:40,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:57:40,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:57:40,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:57:40,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:57:40,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:57:40,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:57:40,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:57:40,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (1/1) ... [2021-12-15 23:57:40,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:57:40,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:57:40,511 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 23:57:40,518 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 23:57:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 23:57:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 23:57:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-15 23:57:40,561 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:57:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:57:40,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:57:40,646 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:57:40,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:57:40,834 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:57:40,838 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:57:40,839 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 23:57:40,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:57:40 BoogieIcfgContainer [2021-12-15 23:57:40,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:57:40,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:57:40,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:57:40,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:57:40,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:57:40" (1/3) ... [2021-12-15 23:57:40,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c68e928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:57:40, skipping insertion in model container [2021-12-15 23:57:40,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:57:40" (2/3) ... [2021-12-15 23:57:40,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c68e928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:57:40, skipping insertion in model container [2021-12-15 23:57:40,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:57:40" (3/3) ... [2021-12-15 23:57:40,846 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2021-12-15 23:57:40,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:57:40,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:57:40,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:57:40,889 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 23:57:40,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:57:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 34 states have internal predecessors, (50), 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 23:57:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 23:57:40,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:57:40,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:57:40,917 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:57:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:57:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2119803949, now seen corresponding path program 1 times [2021-12-15 23:57:40,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:57:40,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091796958] [2021-12-15 23:57:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:40,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:57:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:57:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:57:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,168 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 23:57:41,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:57:41,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091796958] [2021-12-15 23:57:41,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091796958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:57:41,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:57:41,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:57:41,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073054994] [2021-12-15 23:57:41,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:57:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:57:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:57:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:57:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:57:41,201 INFO L87 Difference]: Start difference. First operand has 39 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 34 states have internal predecessors, (50), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 23:57:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:57:41,273 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2021-12-15 23:57:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:57:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 25 [2021-12-15 23:57:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:57:41,280 INFO L225 Difference]: With dead ends: 71 [2021-12-15 23:57:41,280 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 23:57:41,283 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 23:57:41,285 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:57:41,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:57:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 23:57:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 23:57:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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 23:57:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-15 23:57:41,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 25 [2021-12-15 23:57:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:57:41,317 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-15 23:57:41,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 23:57:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-15 23:57:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 23:57:41,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:57:41,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:57:41,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:57:41,321 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:57:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:57:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash -826043684, now seen corresponding path program 1 times [2021-12-15 23:57:41,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:57:41,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239744669] [2021-12-15 23:57:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:41,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:57:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:57:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 23:57:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,438 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 23:57:41,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:57:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239744669] [2021-12-15 23:57:41,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239744669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:57:41,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:57:41,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:57:41,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131854506] [2021-12-15 23:57:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:57:41,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:57:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:57:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:57:41,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:57:41,441 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 23:57:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:57:41,483 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-12-15 23:57:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:57:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 26 [2021-12-15 23:57:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:57:41,487 INFO L225 Difference]: With dead ends: 58 [2021-12-15 23:57:41,487 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 23:57:41,487 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 23:57:41,488 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:57:41,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:57:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 23:57:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-15 23:57:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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 23:57:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-15 23:57:41,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 26 [2021-12-15 23:57:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:57:41,495 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-15 23:57:41,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 23:57:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-15 23:57:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 23:57:41,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:57:41,498 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, 1] [2021-12-15 23:57:41,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:57:41,499 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:57:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:57:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1959720012, now seen corresponding path program 1 times [2021-12-15 23:57:41,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:57:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47124313] [2021-12-15 23:57:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:41,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:57:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:57:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:57:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 23:57:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:41,888 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 23:57:41,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:57:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47124313] [2021-12-15 23:57:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47124313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635355130] [2021-12-15 23:57:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:41,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:57:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:57:41,892 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 23:57:41,893 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 23:57:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 23:57:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:57:42,359 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 17 treesize of output 9 [2021-12-15 23:57:42,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:42,475 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 24 treesize of output 24 [2021-12-15 23:57:42,514 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 25 treesize of output 13 [2021-12-15 23:57:42,552 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 23:57:42,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:57:42,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_9| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_9| v_ArrVal_316) |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (<= (+ .cse0 1) 0) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_9|) (<= 1 .cse0)))) is different from false [2021-12-15 23:57:42,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635355130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:42,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:57:42,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-12-15 23:57:42,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426690026] [2021-12-15 23:57:42,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:57:42,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 23:57:42,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:57:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 23:57:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=482, Unknown=1, NotChecked=44, Total=600 [2021-12-15 23:57:42,665 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 17 states have internal predecessors, (42), 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 23:57:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:57:42,906 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-12-15 23:57:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 23:57:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 17 states have internal predecessors, (42), 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 [2021-12-15 23:57:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:57:42,908 INFO L225 Difference]: With dead ends: 44 [2021-12-15 23:57:42,909 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 23:57:42,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=756, Unknown=1, NotChecked=56, Total=930 [2021-12-15 23:57:42,910 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:57:42,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 251 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2021-12-15 23:57:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 23:57:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-12-15 23:57:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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 23:57:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-15 23:57:42,914 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 34 [2021-12-15 23:57:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:57:42,914 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-15 23:57:42,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 17 states have internal predecessors, (42), 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 23:57:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-15 23:57:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 23:57:42,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:57:42,915 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, 1, 1, 1, 1] [2021-12-15 23:57:42,936 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 23:57:43,131 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 23:57:43,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:57:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:57:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash -158694653, now seen corresponding path program 1 times [2021-12-15 23:57:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:57:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134439831] [2021-12-15 23:57:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:43,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:57:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:57:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:43,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:57:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:43,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 23:57:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:57:43,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:57:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134439831] [2021-12-15 23:57:43,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134439831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597790105] [2021-12-15 23:57:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:43,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:57:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:57:43,518 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 23:57:43,519 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 23:57:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-15 23:57:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:57:43,644 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 23:57:43,674 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 23:57:43,734 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 23:57:43,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-15 23:57:43,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 23:57:43,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:57:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:43,934 INFO L354 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2021-12-15 23:57:43,935 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 3 case distinctions, treesize of input 22 treesize of output 29 [2021-12-15 23:57:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:57:44,096 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 23:57:44,097 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 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-15 23:57:44,223 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-15 23:57:44,223 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 21 [2021-12-15 23:57:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,232 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 23:57:44,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2021-12-15 23:57:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,376 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:57:44,377 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 62 treesize of output 58 [2021-12-15 23:57:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,383 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 44 treesize of output 44 [2021-12-15 23:57:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,410 INFO L354 Elim1Store]: treesize reduction 28, result has 47.2 percent of original size [2021-12-15 23:57:44,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 23:57:44,770 INFO L354 Elim1Store]: treesize reduction 92, result has 17.1 percent of original size [2021-12-15 23:57:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 64 [2021-12-15 23:57:44,788 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-15 23:57:44,789 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 85 [2021-12-15 23:57:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:44,798 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 66 treesize of output 68 [2021-12-15 23:57:44,865 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 52 treesize of output 40 [2021-12-15 23:57:44,942 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-12-15 23:57:44,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 36 [2021-12-15 23:57:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:57:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:57:45,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (v_ArrVal_505 (Array Int Int))) (not (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_504))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse0 .cse1) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| v_ArrVal_505) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_503) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse1))))) is different from false [2021-12-15 23:57:45,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (v_ArrVal_505 (Array Int Int)) (|ULTIMATE.start_sll_circular_append_~last~1#1.offset| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse3 (select |c_#memory_$Pointer$.base| .cse2))) (or (not (let ((.cse0 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 |ULTIMATE.start_sll_circular_append_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_504))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse0 .cse1) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_505) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_503) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse1)))) (not (= (select .cse3 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) .cse2)))))) is different from false [2021-12-15 23:57:45,202 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (v_ArrVal_505 (Array Int Int)) (|ULTIMATE.start_sll_circular_append_~last~1#1.offset| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse3 (select |c_#memory_$Pointer$.base| .cse2))) (or (not (let ((.cse0 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 |ULTIMATE.start_sll_circular_append_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_504))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse0 .cse1) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_505) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_503) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse1)))) (not (= (select .cse3 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) .cse2)))))) is different from false [2021-12-15 23:57:45,289 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13| Int) (v_ArrVal_505 (Array Int Int)) (|ULTIMATE.start_sll_circular_append_~last~1#1.offset| Int)) (let ((.cse4 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13| v_ArrVal_514))) (let ((.cse1 (select (select .cse4 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse0 (select .cse4 .cse1))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13|))) (not (= (select .cse0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|) .cse1)) (not (let ((.cse2 (store (store .cse4 .cse1 (store .cse0 |ULTIMATE.start_sll_circular_append_~last~1#1.offset| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13| v_ArrVal_504))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse2 .cse3) (select (select (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13| v_ArrVal_513) .cse1 v_ArrVal_505) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13| v_ArrVal_503) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse3)))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_13|)))))) is different from false [2021-12-15 23:57:45,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597790105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:45,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:57:45,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 41 [2021-12-15 23:57:45,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782463548] [2021-12-15 23:57:45,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:57:45,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 23:57:45,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:57:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 23:57:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1829, Unknown=5, NotChecked=356, Total=2352 [2021-12-15 23:57:45,293 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 41 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:57:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:57:45,940 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2021-12-15 23:57:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 23:57:45,940 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2021-12-15 23:57:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:57:45,941 INFO L225 Difference]: With dead ends: 71 [2021-12-15 23:57:45,941 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 23:57:45,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=257, Invalid=2722, Unknown=7, NotChecked=436, Total=3422 [2021-12-15 23:57:45,943 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:57:45,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 426 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 401 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2021-12-15 23:57:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 23:57:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-12-15 23:57:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:57:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-12-15 23:57:45,949 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 37 [2021-12-15 23:57:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:57:45,949 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-12-15 23:57:45,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:57:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-12-15 23:57:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 23:57:45,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:57:45,950 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:57:45,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:57:46,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 23:57:46,166 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:57:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:57:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1887720382, now seen corresponding path program 1 times [2021-12-15 23:57:46,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:57:46,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621792976] [2021-12-15 23:57:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:46,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:57:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:46,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:57:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:46,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:57:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 23:57:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:57:46,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:57:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621792976] [2021-12-15 23:57:46,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621792976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94957940] [2021-12-15 23:57:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:46,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:57:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:57:46,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:57:46,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:57:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-15 23:57:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:57:47,023 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 23:57:47,056 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 23:57:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,152 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 23:57:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,273 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 23:57:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,371 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-15 23:57:47,371 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 23:57:47,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:57:47,541 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 23:57:47,542 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-12-15 23:57:47,689 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-15 23:57:47,689 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 25 [2021-12-15 23:57:47,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,694 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 23:57:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,853 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:57:47,853 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 78 treesize of output 68 [2021-12-15 23:57:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,857 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 61 treesize of output 59 [2021-12-15 23:57:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:47,870 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-12-15 23:57:47,871 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 37 treesize of output 37 [2021-12-15 23:57:48,447 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-12-15 23:57:48,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 71 [2021-12-15 23:57:48,470 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-15 23:57:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 113 [2021-12-15 23:57:48,488 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-12-15 23:57:48,488 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 148 [2021-12-15 23:57:48,576 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 122 treesize of output 94 [2021-12-15 23:57:48,673 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-15 23:57:48,673 INFO L388 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 117 treesize of output 39 [2021-12-15 23:57:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:57:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:57:48,739 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_701 (Array Int Int)) (v_ArrVal_703 (Array Int Int)) (v_ArrVal_705 (Array Int Int))) (not (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_703))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| v_ArrVal_705) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_701) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-15 23:57:48,908 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_701 (Array Int Int)) (v_ArrVal_703 (Array Int Int)) (v_ArrVal_705 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset|))) (let ((.cse3 (select |c_#memory_$Pointer$.base| .cse2))) (or (not (let ((.cse1 (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_703))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse0 (select (select .cse1 .cse0) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_705) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_701) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|) (select .cse3 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10|))))))) is different from false [2021-12-15 23:57:48,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_701 (Array Int Int)) (v_ArrVal_703 (Array Int Int)) (v_ArrVal_705 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse4))) (or (not (= .cse0 (select .cse1 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10|))) (not (let ((.cse3 (store (store |c_#memory_$Pointer$.base| .cse4 (store .cse1 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base|)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_703))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse2 (select (select .cse3 .cse2) (select (select (store (store |c_#memory_$Pointer$.offset| .cse4 v_ArrVal_705) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_701) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))))) is different from false [2021-12-15 23:57:48,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_701 (Array Int Int)) (v_ArrVal_703 (Array Int Int)) (v_ArrVal_705 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse4))) (or (not (= .cse0 (select .cse1 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10|))) (not (let ((.cse3 (store (store |c_#memory_$Pointer$.base| .cse4 (store .cse1 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_703))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse2 (select (select .cse3 .cse2) (select (select (store (store |c_#memory_$Pointer$.offset| .cse4 v_ArrVal_705) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_701) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))))) is different from false [2021-12-15 23:57:49,035 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17| Int) (v_ArrVal_713 (Array Int Int)) (v_ArrVal_712 (Array Int Int)) (v_ArrVal_701 (Array Int Int)) (v_ArrVal_703 (Array Int Int)) (v_ArrVal_705 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| Int)) (let ((.cse6 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17| v_ArrVal_712))) (let ((.cse0 (select (select .cse6 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17| v_ArrVal_713))) (let ((.cse5 (select (select .cse6 .cse0) (select (select .cse4 |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (let ((.cse1 (select .cse6 .cse5))) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17|) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17|))) (not (= .cse0 (select .cse1 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10|))) (not (let ((.cse3 (store (store .cse6 .cse5 (store .cse1 |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_10| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17|)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17| v_ArrVal_703))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= .cse2 (select (select .cse3 .cse2) (select (select (store (store .cse4 .cse5 v_ArrVal_705) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_17| v_ArrVal_701) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))))))) is different from false [2021-12-15 23:57:49,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94957940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:49,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:57:49,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 46 [2021-12-15 23:57:49,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837175653] [2021-12-15 23:57:49,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:57:49,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-15 23:57:49,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:57:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-15 23:57:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2120, Unknown=6, NotChecked=480, Total=2756 [2021-12-15 23:57:49,043 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 46 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 37 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:57:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:57:50,422 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2021-12-15 23:57:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 23:57:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 37 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-12-15 23:57:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:57:50,425 INFO L225 Difference]: With dead ends: 69 [2021-12-15 23:57:50,425 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 23:57:50,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=294, Invalid=3752, Unknown=6, NotChecked=640, Total=4692 [2021-12-15 23:57:50,427 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:57:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 507 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 573 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2021-12-15 23:57:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 23:57:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-12-15 23:57:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-15 23:57:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-12-15 23:57:50,444 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 39 [2021-12-15 23:57:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:57:50,445 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-12-15 23:57:50,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 37 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:57:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-12-15 23:57:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 23:57:50,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:57:50,453 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:57:50,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:57:50,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:57:50,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:57:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:57:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1669816953, now seen corresponding path program 1 times [2021-12-15 23:57:50,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:57:50,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517205426] [2021-12-15 23:57:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:50,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:57:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:51,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:57:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:51,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:57:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:51,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 23:57:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:57:51,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:57:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517205426] [2021-12-15 23:57:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517205426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:57:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733198630] [2021-12-15 23:57:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:57:51,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:57:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:57:51,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:57:51,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 23:57:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:57:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 180 conjunts are in the unsatisfiable core [2021-12-15 23:57:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:57:51,782 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 23:57:51,972 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 23:57:52,060 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 23:57:52,139 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-15 23:57:52,140 INFO L388 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 [2021-12-15 23:57:52,240 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 19 treesize of output 18 [2021-12-15 23:57:52,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:57:52,355 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 23:57:52,356 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 1 case distinctions, treesize of input 45 treesize of output 42 [2021-12-15 23:57:52,360 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 18 treesize of output 20 [2021-12-15 23:57:52,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 23:57:52,540 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 31 [2021-12-15 23:57:52,544 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 23:57:52,549 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 7 treesize of output 3 [2021-12-15 23:57:52,552 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 23:57:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:52,775 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 23:57:52,776 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 78 treesize of output 66 [2021-12-15 23:57:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:52,782 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 18 treesize of output 20 [2021-12-15 23:57:52,796 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-15 23:57:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-15 23:57:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:52,826 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 23:57:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,492 INFO L354 Elim1Store]: treesize reduction 121, result has 11.7 percent of original size [2021-12-15 23:57:53,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 567 treesize of output 324 [2021-12-15 23:57:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,599 INFO L354 Elim1Store]: treesize reduction 184, result has 18.2 percent of original size [2021-12-15 23:57:53,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 423 treesize of output 375 [2021-12-15 23:57:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,640 INFO L354 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2021-12-15 23:57:53,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 658 treesize of output 436 [2021-12-15 23:57:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,680 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-12-15 23:57:53,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 514 treesize of output 499 [2021-12-15 23:57:53,702 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 129 treesize of output 125 [2021-12-15 23:57:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,726 INFO L388 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2021-12-15 23:57:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 21 treesize of output 19 [2021-12-15 23:57:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 21 treesize of output 19 [2021-12-15 23:57:53,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 21 treesize of output 19 [2021-12-15 23:57:53,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 21 treesize of output 19 [2021-12-15 23:57:53,800 INFO L388 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 32 treesize of output 31 [2021-12-15 23:57:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 65 [2021-12-15 23:57:53,833 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 33 treesize of output 31 [2021-12-15 23:57:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-12-15 23:57:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:53,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 41 [2021-12-15 23:57:53,903 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 9 treesize of output 7 [2021-12-15 23:57:53,962 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-12-15 23:57:53,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 481 treesize of output 314 [2021-12-15 23:57:53,973 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-12-15 23:57:53,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 293 [2021-12-15 23:57:53,979 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 33 treesize of output 31 [2021-12-15 23:57:53,984 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 9 treesize of output 7 [2021-12-15 23:57:54,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:54,012 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-12-15 23:57:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 282 treesize of output 230 [2021-12-15 23:57:54,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 23:57:54,467 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-12-15 23:57:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 144 [2021-12-15 23:57:54,599 INFO L354 Elim1Store]: treesize reduction 57, result has 6.6 percent of original size [2021-12-15 23:57:54,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 56 [2021-12-15 23:57:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:57:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:58:44,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733198630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:44,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:58:44,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-15 23:58:44,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385214938] [2021-12-15 23:58:44,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-15 23:58:44,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-15 23:58:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3685, Unknown=15, NotChecked=0, Total=3906 [2021-12-15 23:58:44,696 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 50 states, 46 states have (on average 1.434782608695652) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:58:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:58:47,009 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2021-12-15 23:58:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 23:58:47,010 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 1.434782608695652) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2021-12-15 23:58:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:58:47,010 INFO L225 Difference]: With dead ends: 81 [2021-12-15 23:58:47,010 INFO L226 Difference]: Without dead ends: 73 [2021-12-15 23:58:47,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=413, Invalid=6052, Unknown=15, NotChecked=0, Total=6480 [2021-12-15 23:58:47,012 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:58:47,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 889 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1158 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2021-12-15 23:58:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-15 23:58:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-12-15 23:58:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-15 23:58:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-12-15 23:58:47,017 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 41 [2021-12-15 23:58:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:58:47,017 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-12-15 23:58:47,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 1.434782608695652) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-15 23:58:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-12-15 23:58:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 23:58:47,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:47,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:47,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 23:58:47,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:47,218 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1397547449, now seen corresponding path program 2 times [2021-12-15 23:58:47,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:58:47,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466978331] [2021-12-15 23:58:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:47,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:58:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:47,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-15 23:58:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:47,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 23:58:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:47,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 23:58:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 23:58:48,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:58:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466978331] [2021-12-15 23:58:48,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466978331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:58:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308508573] [2021-12-15 23:58:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:58:48,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:48,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:58:48,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 23:58:48,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:58:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:58:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 171 conjunts are in the unsatisfiable core [2021-12-15 23:58:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:48,272 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 23:58:48,301 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 23:58:48,381 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 23:58:48,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-15 23:58:48,467 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 23:58:48,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 23:58:48,569 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 329531 column 46: unknown constant v_#valid_BEFORE_CALL_20 [2021-12-15 23:58:48,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:58:48,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-15 23:58:48,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195415923] [2021-12-15 23:58:48,569 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 23:58:48,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 23:58:48,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:58:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 23:58:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2021-12-15 23:58:48,570 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 26 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-15 23:58:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 23:58:48,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2021-12-15 23:58:48,571 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 [2021-12-15 23:58:48,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:58:48,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 23:58:48,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:58:48,773 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@65302183 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2021-12-15 23:58:48,776 INFO L158 Benchmark]: Toolchain (without parser) took 68751.26ms. Allocated memory was 88.1MB in the beginning and 237.0MB in the end (delta: 148.9MB). Free memory was 45.5MB in the beginning and 92.7MB in the end (delta: -47.2MB). Peak memory consumption was 101.0MB. Max. memory is 16.1GB. [2021-12-15 23:58:48,776 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:58:48,776 INFO L158 Benchmark]: CACSL2BoogieTranslator took 362.87ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 45.2MB in the beginning and 77.4MB in the end (delta: -32.2MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. [2021-12-15 23:58:48,776 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.61ms. Allocated memory is still 113.2MB. Free memory was 77.4MB in the beginning and 75.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:58:48,776 INFO L158 Benchmark]: Boogie Preprocessor took 42.76ms. Allocated memory is still 113.2MB. Free memory was 75.3MB in the beginning and 73.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:58:48,776 INFO L158 Benchmark]: RCFGBuilder took 352.80ms. Allocated memory is still 113.2MB. Free memory was 73.6MB in the beginning and 78.8MB in the end (delta: -5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-15 23:58:48,776 INFO L158 Benchmark]: TraceAbstraction took 67933.78ms. Allocated memory was 113.2MB in the beginning and 237.0MB in the end (delta: 123.7MB). Free memory was 78.1MB in the beginning and 92.7MB in the end (delta: -14.6MB). Peak memory consumption was 111.3MB. Max. memory is 16.1GB. [2021-12-15 23:58:48,777 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 88.1MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 362.87ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 45.2MB in the beginning and 77.4MB in the end (delta: -32.2MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.61ms. Allocated memory is still 113.2MB. Free memory was 77.4MB in the beginning and 75.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.76ms. Allocated memory is still 113.2MB. Free memory was 75.3MB in the beginning and 73.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 352.80ms. Allocated memory is still 113.2MB. Free memory was 73.6MB in the beginning and 78.8MB in the end (delta: -5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 67933.78ms. Allocated memory was 113.2MB in the beginning and 237.0MB in the end (delta: 123.7MB). Free memory was 78.1MB in the beginning and 92.7MB in the end (delta: -14.6MB). Peak memory consumption was 111.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@65302183 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@65302183: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 23:58:48,796 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 1 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/sll2c_append_unequal.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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:58:50,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:58:50,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:58:50,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:58:50,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:58:50,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:58:50,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:58:50,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:58:50,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:58:50,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:58:50,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:58:50,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:58:50,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:58:50,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:58:50,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:58:50,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:58:50,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:58:50,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:58:50,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:58:50,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:58:50,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:58:50,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:58:50,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:58:50,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:58:50,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:58:50,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:58:50,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:58:50,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:58:50,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:58:50,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:58:50,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:58:50,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:58:50,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:58:50,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:58:50,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:58:50,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:58:50,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:58:50,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:58:50,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:58:50,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:58:50,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:58:50,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 23:58:50,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:58:50,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:58:50,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:58:50,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:58:50,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:58:50,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:58:50,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:58:50,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:58:50,397 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:58:50,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:58:50,398 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 23:58:50,399 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 23:58:50,399 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 23:58:50,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:58:50,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:58:50,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:58:50,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:58:50,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:58:50,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:58:50,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:58:50,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:58:50,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:58:50,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:58:50,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:58:50,408 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 23:58:50,408 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 23:58:50,409 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:58:50,409 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:58:50,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:58:50,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:58:50,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 23:58:50,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2021-12-15 23:58:50,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:58:50,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:58:50,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:58:50,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:58:50,669 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:58:50,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-12-15 23:58:50,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d61aad5/9b7822b86ee44453b66c224c70b9d990/FLAG7053788c0 [2021-12-15 23:58:51,160 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:58:51,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-12-15 23:58:51,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d61aad5/9b7822b86ee44453b66c224c70b9d990/FLAG7053788c0 [2021-12-15 23:58:51,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d61aad5/9b7822b86ee44453b66c224c70b9d990 [2021-12-15 23:58:51,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:58:51,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:58:51,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:58:51,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:58:51,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:58:51,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9748eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51, skipping insertion in model container [2021-12-15 23:58:51,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:58:51,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:58:51,795 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/sll2c_append_unequal.i[24587,24600] [2021-12-15 23:58:51,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:58:51,810 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:58:51,854 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/sll2c_append_unequal.i[24587,24600] [2021-12-15 23:58:51,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:58:51,884 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:58:51,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51 WrapperNode [2021-12-15 23:58:51,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:58:51,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:58:51,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:58:51,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:58:51,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,923 INFO L137 Inliner]: procedures = 130, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 159 [2021-12-15 23:58:51,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:58:51,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:58:51,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:58:51,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:58:51,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:58:51,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:58:51,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:58:51,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:58:51,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (1/1) ... [2021-12-15 23:58:51,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:58:51,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:58:52,004 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 23:58:52,006 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 23:58:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 23:58:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-15 23:58:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-15 23:58:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:58:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:58:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 23:58:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:58:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:58:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:58:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 23:58:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 23:58:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 23:58:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:58:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:58:52,207 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:58:52,208 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:58:52,446 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:58:52,450 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:58:52,451 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 23:58:52,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:58:52 BoogieIcfgContainer [2021-12-15 23:58:52,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:58:52,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:58:52,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:58:52,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:58:52,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:58:51" (1/3) ... [2021-12-15 23:58:52,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5995b8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:58:52, skipping insertion in model container [2021-12-15 23:58:52,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:58:51" (2/3) ... [2021-12-15 23:58:52,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5995b8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:58:52, skipping insertion in model container [2021-12-15 23:58:52,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:58:52" (3/3) ... [2021-12-15 23:58:52,459 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2021-12-15 23:58:52,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:58:52,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:58:52,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:58:52,515 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 23:58:52,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:58:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 34 states have internal predecessors, (50), 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 23:58:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 23:58:52,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:58:52,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:58:52,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:58:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:58:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2119803949, now seen corresponding path program 1 times [2021-12-15 23:58:52,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:58:52,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777903893] [2021-12-15 23:58:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:58:52,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:58:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:58:52,547 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) [2021-12-15 23:58:52,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 23:58:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:58:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 23:58:52,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:58:52,759 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 23:58:52,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:58:52,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:58:52,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777903893] [2021-12-15 23:58:52,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777903893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:58:52,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:58:52,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:58:52,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257991057] [2021-12-15 23:58:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:58:52,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 23:58:52,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:58:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 23:58:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 23:58:52,789 INFO L87 Difference]: Start difference. First operand has 39 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 34 states have internal predecessors, (50), 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 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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)