./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash ed18c341b13cb38f54b1bbde59f9cd5a73bcebd88430e5620ebca0060f7baed5 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:13:40,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:13:40,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:13:40,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:13:40,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:13:40,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:13:40,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:13:40,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:13:40,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:13:40,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:13:40,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:13:40,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:13:40,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:13:40,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:13:40,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:13:40,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:13:40,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:13:40,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:13:40,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:13:40,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:13:40,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:13:40,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:13:40,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:13:40,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:13:40,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:13:40,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:13:40,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:13:40,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:13:40,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:13:40,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:13:40,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:13:40,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:13:40,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:13:40,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:13:40,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:13:40,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:13:40,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:13:40,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:13:40,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:13:40,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:13:40,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:13:40,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 13:13:41,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:13:41,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:13:41,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:13:41,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:13:41,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:13:41,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:13:41,010 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:13:41,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:13:41,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 13:13:41,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:13:41,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:13:41,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:13:41,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:13:41,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:13:41,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:13:41,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:13:41,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:13:41,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:13:41,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:13:41,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:13:41,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:13:41,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:13:41,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:13:41,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 13:13:41,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 13:13:41,014 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:13:41,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:13:41,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:13:41,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:13:41,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed18c341b13cb38f54b1bbde59f9cd5a73bcebd88430e5620ebca0060f7baed5 [2021-11-07 13:13:41,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:13:41,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:13:41,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:13:41,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:13:41,247 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:13:41,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i [2021-11-07 13:13:41,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76b3a12d/fd97f958d18740a6bf59951420e87fac/FLAG52c495e06 [2021-11-07 13:13:42,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:13:42,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i [2021-11-07 13:13:42,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76b3a12d/fd97f958d18740a6bf59951420e87fac/FLAG52c495e06 [2021-11-07 13:13:42,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d76b3a12d/fd97f958d18740a6bf59951420e87fac [2021-11-07 13:13:42,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:13:42,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:13:42,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:13:42,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:13:42,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:13:42,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:42" (1/1) ... [2021-11-07 13:13:42,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20be48f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:42, skipping insertion in model container [2021-11-07 13:13:42,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:42" (1/1) ... [2021-11-07 13:13:42,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:13:42,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:13:44,472 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i[198800,198813] [2021-11-07 13:13:45,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:13:45,344 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:13:45,510 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i[198800,198813] [2021-11-07 13:13:45,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:13:45,787 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:13:45,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45 WrapperNode [2021-11-07 13:13:45,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:13:45,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:13:45,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:13:45,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:13:45,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:45,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:46,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:13:46,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:13:46,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:13:46,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:13:46,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:46,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:47,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:47,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:48,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:48,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:48,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:48,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:13:48,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:13:48,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:13:48,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:13:48,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (1/1) ... [2021-11-07 13:13:48,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:13:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:13:48,868 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) [2021-11-07 13:13:48,895 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 [2021-11-07 13:13:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-07 13:13:48,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-07 13:13:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 13:13:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:13:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:13:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_xmit_process [2021-11-07 13:13:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_xmit_process [2021-11-07 13:13:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_destroy_interface [2021-11-07 13:13:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_destroy_interface [2021-11-07 13:13:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_push [2021-11-07 13:13:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_push [2021-11-07 13:13:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_release [2021-11-07 13:13:48,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_release [2021-11-07 13:13:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:13:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:13:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_send_frame [2021-11-07 13:13:48,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_send_frame [2021-11-07 13:13:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:13:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:13:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_channel_push [2021-11-07 13:13:48,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_channel_push [2021-11-07 13:13:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 13:13:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_disconnect_channel [2021-11-07 13:13:48,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_disconnect_channel [2021-11-07 13:13:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 13:13:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 13:13:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-11-07 13:13:48,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-11-07 13:13:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unregister_channel [2021-11-07 13:13:48,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unregister_channel [2021-11-07 13:13:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 13:13:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_ccp_closed [2021-11-07 13:13:48,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_ccp_closed [2021-11-07 13:13:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:13:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:13:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 13:13:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 13:13:48,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 13:13:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_mp_explode [2021-11-07 13:13:48,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_mp_explode [2021-11-07 13:13:48,918 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-07 13:13:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-07 13:13:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_ioctl [2021-11-07 13:13:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_ioctl [2021-11-07 13:13:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_ccp_peek [2021-11-07 13:13:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_ccp_peek [2021-11-07 13:13:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 13:13:48,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:13:48,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:14:12,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:14:12,211 INFO L299 CfgBuilder]: Removed 7944 assume(true) statements. [2021-11-07 13:14:12,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:12 BoogieIcfgContainer [2021-11-07 13:14:12,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:14:12,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:14:12,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:14:12,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:14:12,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:42" (1/3) ... [2021-11-07 13:14:12,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759f9175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:12, skipping insertion in model container [2021-11-07 13:14:12,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:45" (2/3) ... [2021-11-07 13:14:12,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759f9175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:12, skipping insertion in model container [2021-11-07 13:14:12,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:12" (3/3) ... [2021-11-07 13:14:12,231 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i [2021-11-07 13:14:12,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:14:12,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:14:12,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:14:12,327 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 [2021-11-07 13:14:12,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:14:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 8551 states, 8460 states have (on average 1.5256501182033098) internal successors, (12907), 8486 states have internal predecessors, (12907), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 69 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-07 13:14:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 13:14:12,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:12,610 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:12,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1904356284, now seen corresponding path program 1 times [2021-11-07 13:14:12,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:12,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854598823] [2021-11-07 13:14:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:12,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:14:13,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:13,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854598823] [2021-11-07 13:14:13,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854598823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:13,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:13,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:14:13,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097701938] [2021-11-07 13:14:13,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:13,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:14:13,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:14:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:14:13,367 INFO L87 Difference]: Start difference. First operand has 8551 states, 8460 states have (on average 1.5256501182033098) internal successors, (12907), 8486 states have internal predecessors, (12907), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 69 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:19,167 INFO L93 Difference]: Finished difference Result 25571 states and 39270 transitions. [2021-11-07 13:14:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:14:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 13:14:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:19,298 INFO L225 Difference]: With dead ends: 25571 [2021-11-07 13:14:19,298 INFO L226 Difference]: Without dead ends: 16898 [2021-11-07 13:14:19,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.74ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:14:19,353 INFO L933 BasicCegarLoop]: 10976 mSDtfsCounter, 11613 mSDsluCounter, 32744 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3816.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11613 SdHoareTripleChecker+Valid, 43720 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 103.17ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4784.68ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:19,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11613 Valid, 43720 Invalid, 4271 Unknown, 0 Unchecked, 103.17ms Time], IncrementalHoareTripleChecker [52 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 4784.68ms Time] [2021-11-07 13:14:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16898 states. [2021-11-07 13:14:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16898 to 16186. [2021-11-07 13:14:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16186 states, 16007 states have (on average 1.3879552695695634) internal successors, (22217), 16057 states have internal predecessors, (22217), 146 states have call successors, (146), 32 states have call predecessors, (146), 32 states have return successors, (219), 138 states have call predecessors, (219), 146 states have call successors, (219) [2021-11-07 13:14:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16186 states to 16186 states and 22582 transitions. [2021-11-07 13:14:19,993 INFO L78 Accepts]: Start accepts. Automaton has 16186 states and 22582 transitions. Word has length 35 [2021-11-07 13:14:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 16186 states and 22582 transitions. [2021-11-07 13:14:19,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 16186 states and 22582 transitions. [2021-11-07 13:14:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 13:14:20,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:20,007 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1] [2021-11-07 13:14:20,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 13:14:20,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1149088240, now seen corresponding path program 1 times [2021-11-07 13:14:20,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:20,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411879227] [2021-11-07 13:14:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:20,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:14:20,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:20,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411879227] [2021-11-07 13:14:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411879227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:20,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:14:20,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301155456] [2021-11-07 13:14:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:14:20,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:14:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:14:20,179 INFO L87 Difference]: Start difference. First operand 16186 states and 22582 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:21,148 INFO L93 Difference]: Finished difference Result 45840 states and 64262 transitions. [2021-11-07 13:14:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:14:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 13:14:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:21,351 INFO L225 Difference]: With dead ends: 45840 [2021-11-07 13:14:21,351 INFO L226 Difference]: Without dead ends: 29729 [2021-11-07 13:14:21,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.76ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:14:21,431 INFO L933 BasicCegarLoop]: 18212 mSDtfsCounter, 10006 mSDsluCounter, 11650 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10006 SdHoareTripleChecker+Valid, 29862 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.70ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.39ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:21,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10006 Valid, 29862 Invalid, 50 Unknown, 0 Unchecked, 34.70ms Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 129.39ms Time] [2021-11-07 13:14:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29729 states. [2021-11-07 13:14:22,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29729 to 28212. [2021-11-07 13:14:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28212 states, 27863 states have (on average 1.3924559451602483) internal successors, (38798), 27959 states have internal predecessors, (38798), 284 states have call successors, (284), 64 states have call predecessors, (284), 64 states have return successors, (614), 266 states have call predecessors, (614), 284 states have call successors, (614) [2021-11-07 13:14:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28212 states to 28212 states and 39696 transitions. [2021-11-07 13:14:22,494 INFO L78 Accepts]: Start accepts. Automaton has 28212 states and 39696 transitions. Word has length 55 [2021-11-07 13:14:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:22,494 INFO L470 AbstractCegarLoop]: Abstraction has 28212 states and 39696 transitions. [2021-11-07 13:14:22,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 28212 states and 39696 transitions. [2021-11-07 13:14:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 13:14:22,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:22,504 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2021-11-07 13:14:22,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 13:14:22,504 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1727795715, now seen corresponding path program 1 times [2021-11-07 13:14:22,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:22,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429237242] [2021-11-07 13:14:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:22,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:14:22,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:22,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429237242] [2021-11-07 13:14:22,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429237242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:22,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:22,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:14:22,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157979978] [2021-11-07 13:14:22,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:14:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:14:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:14:22,723 INFO L87 Difference]: Start difference. First operand 28212 states and 39696 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:24,033 INFO L93 Difference]: Finished difference Result 79690 states and 111922 transitions. [2021-11-07 13:14:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:14:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 13:14:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:24,310 INFO L225 Difference]: With dead ends: 79690 [2021-11-07 13:14:24,310 INFO L226 Difference]: Without dead ends: 51553 [2021-11-07 13:14:24,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.78ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:14:24,417 INFO L933 BasicCegarLoop]: 20916 mSDtfsCounter, 9910 mSDsluCounter, 11656 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9910 SdHoareTripleChecker+Valid, 32572 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.44ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.75ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:24,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9910 Valid, 32572 Invalid, 34 Unknown, 0 Unchecked, 32.44ms Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 86.75ms Time] [2021-11-07 13:14:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51553 states. [2021-11-07 13:14:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51553 to 51534. [2021-11-07 13:14:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51534 states, 50897 states have (on average 1.3883136530640312) internal successors, (70661), 51069 states have internal predecessors, (70661), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-07 13:14:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 72285 transitions. [2021-11-07 13:14:26,323 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 72285 transitions. Word has length 58 [2021-11-07 13:14:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:26,323 INFO L470 AbstractCegarLoop]: Abstraction has 51534 states and 72285 transitions. [2021-11-07 13:14:26,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 72285 transitions. [2021-11-07 13:14:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 13:14:26,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:26,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:26,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 13:14:26,332 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1478756629, now seen corresponding path program 1 times [2021-11-07 13:14:26,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:26,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868090898] [2021-11-07 13:14:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:26,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:14:26,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:26,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868090898] [2021-11-07 13:14:26,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868090898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:26,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:26,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:14:26,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41907109] [2021-11-07 13:14:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:26,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:14:26,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:14:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:14:26,529 INFO L87 Difference]: Start difference. First operand 51534 states and 72285 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:27,975 INFO L93 Difference]: Finished difference Result 102998 states and 144491 transitions. [2021-11-07 13:14:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:14:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 13:14:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:28,219 INFO L225 Difference]: With dead ends: 102998 [2021-11-07 13:14:28,219 INFO L226 Difference]: Without dead ends: 51539 [2021-11-07 13:14:28,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:14:28,340 INFO L933 BasicCegarLoop]: 11777 mSDtfsCounter, 11770 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11770 SdHoareTripleChecker+Valid, 11781 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.78ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:28,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11770 Valid, 11781 Invalid, 4 Unknown, 0 Unchecked, 16.91ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 42.78ms Time] [2021-11-07 13:14:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51539 states. [2021-11-07 13:14:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51539 to 51534. [2021-11-07 13:14:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51534 states, 50897 states have (on average 1.3881564728765938) internal successors, (70653), 51069 states have internal predecessors, (70653), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-07 13:14:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 72277 transitions. [2021-11-07 13:14:30,070 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 72277 transitions. Word has length 81 [2021-11-07 13:14:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:30,071 INFO L470 AbstractCegarLoop]: Abstraction has 51534 states and 72277 transitions. [2021-11-07 13:14:30,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 72277 transitions. [2021-11-07 13:14:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 13:14:30,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:30,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:30,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 13:14:30,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash -835888805, now seen corresponding path program 1 times [2021-11-07 13:14:30,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:30,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395951455] [2021-11-07 13:14:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:30,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:14:30,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395951455] [2021-11-07 13:14:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395951455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:30,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:30,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:14:30,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604356887] [2021-11-07 13:14:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:30,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:14:30,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:14:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:14:30,301 INFO L87 Difference]: Start difference. First operand 51534 states and 72277 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:34,669 INFO L93 Difference]: Finished difference Result 205115 states and 288349 transitions. [2021-11-07 13:14:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:14:34,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 13:14:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:35,588 INFO L225 Difference]: With dead ends: 205115 [2021-11-07 13:14:35,588 INFO L226 Difference]: Without dead ends: 153656 [2021-11-07 13:14:35,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.66ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:14:35,732 INFO L933 BasicCegarLoop]: 18523 mSDtfsCounter, 23684 mSDsluCounter, 29473 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1033.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23766 SdHoareTripleChecker+Valid, 47996 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 86.58ms SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1202.20ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:35,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23766 Valid, 47996 Invalid, 828 Unknown, 0 Unchecked, 86.58ms Time], IncrementalHoareTripleChecker [275 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1202.20ms Time] [2021-11-07 13:14:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153656 states. [2021-11-07 13:14:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153656 to 52110. [2021-11-07 13:14:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52110 states, 51473 states have (on average 1.3838128727682475) internal successors, (71229), 51645 states have internal predecessors, (71229), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-07 13:14:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52110 states to 52110 states and 72853 transitions. [2021-11-07 13:14:38,923 INFO L78 Accepts]: Start accepts. Automaton has 52110 states and 72853 transitions. Word has length 83 [2021-11-07 13:14:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:38,925 INFO L470 AbstractCegarLoop]: Abstraction has 52110 states and 72853 transitions. [2021-11-07 13:14:38,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 52110 states and 72853 transitions. [2021-11-07 13:14:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 13:14:38,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:38,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:38,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 13:14:38,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -379160658, now seen corresponding path program 1 times [2021-11-07 13:14:38,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:38,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382816677] [2021-11-07 13:14:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:38,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:14:39,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:39,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382816677] [2021-11-07 13:14:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382816677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:39,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:39,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 13:14:39,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883752097] [2021-11-07 13:14:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:39,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 13:14:39,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 13:14:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:14:39,186 INFO L87 Difference]: Start difference. First operand 52110 states and 72853 transitions. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:55,147 INFO L93 Difference]: Finished difference Result 407297 states and 571981 transitions. [2021-11-07 13:14:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 13:14:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 13:14:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:56,802 INFO L225 Difference]: With dead ends: 407297 [2021-11-07 13:14:56,802 INFO L226 Difference]: Without dead ends: 355262 [2021-11-07 13:14:57,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 396.13ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 13:14:57,016 INFO L933 BasicCegarLoop]: 44963 mSDtfsCounter, 111422 mSDsluCounter, 204464 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 1935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4635.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111461 SdHoareTripleChecker+Valid, 249427 SdHoareTripleChecker+Invalid, 7473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 270.06ms SdHoareTripleChecker+Time, 1935 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5522.02ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111461 Valid, 249427 Invalid, 7473 Unknown, 0 Unchecked, 270.06ms Time], IncrementalHoareTripleChecker [1935 Valid, 5538 Invalid, 0 Unknown, 0 Unchecked, 5522.02ms Time] [2021-11-07 13:14:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355262 states. [2021-11-07 13:15:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355262 to 52126. [2021-11-07 13:15:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52126 states, 51489 states have (on average 1.383693604459205) internal successors, (71245), 51661 states have internal predecessors, (71245), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-07 13:15:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52126 states to 52126 states and 72869 transitions. [2021-11-07 13:15:01,651 INFO L78 Accepts]: Start accepts. Automaton has 52126 states and 72869 transitions. Word has length 90 [2021-11-07 13:15:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:15:01,652 INFO L470 AbstractCegarLoop]: Abstraction has 52126 states and 72869 transitions. [2021-11-07 13:15:01,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:15:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 52126 states and 72869 transitions. [2021-11-07 13:15:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 13:15:01,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:15:01,662 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:15:01,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 13:15:01,662 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:15:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:15:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 326572585, now seen corresponding path program 1 times [2021-11-07 13:15:01,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:15:01,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098223133] [2021-11-07 13:15:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:15:01,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:15:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:15:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:15:01,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:15:01,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098223133] [2021-11-07 13:15:01,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098223133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:15:01,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427007141] [2021-11-07 13:15:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:15:01,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:15:01,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:15:01,958 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) [2021-11-07 13:15:01,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 13:15:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:15:03,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:15:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:15:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:15:03,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:15:03,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427007141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:15:03,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:15:03,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-07 13:15:03,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210749949] [2021-11-07 13:15:03,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:15:03,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:15:03,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:15:03,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:15:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:15:03,249 INFO L87 Difference]: Start difference. First operand 52126 states and 72869 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:15:05,283 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:15:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:15:07,516 INFO L93 Difference]: Finished difference Result 104123 states and 145660 transitions. [2021-11-07 13:15:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:15:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 13:15:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:15:07,671 INFO L225 Difference]: With dead ends: 104123 [2021-11-07 13:15:07,672 INFO L226 Difference]: Without dead ends: 51893 [2021-11-07 13:15:07,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.45ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:15:07,762 INFO L933 BasicCegarLoop]: 12019 mSDtfsCounter, 11597 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2041.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11597 SdHoareTripleChecker+Valid, 12398 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.71ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2167.18ms IncrementalHoareTripleChecker+Time [2021-11-07 13:15:07,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11597 Valid, 12398 Invalid, 13 Unknown, 0 Unchecked, 14.71ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2167.18ms Time] [2021-11-07 13:15:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51893 states.