./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--usb--cx82310_eth.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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--usb--cx82310_eth.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 4e983f35cff7a0c67962e23f6c3d66292f25c728e4d1df204c975f306d1512a3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 23:52:32,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 23:52:32,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 23:52:32,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 23:52:32,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 23:52:32,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 23:52:32,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 23:52:32,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 23:52:32,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 23:52:32,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 23:52:32,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 23:52:32,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 23:52:32,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 23:52:32,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 23:52:32,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 23:52:32,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 23:52:32,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 23:52:32,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 23:52:32,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 23:52:32,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 23:52:32,867 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 23:52:32,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 23:52:32,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 23:52:32,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 23:52:32,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 23:52:32,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 23:52:32,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 23:52:32,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 23:52:32,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 23:52:32,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 23:52:32,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 23:52:32,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 23:52:32,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 23:52:32,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 23:52:32,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 23:52:32,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 23:52:32,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 23:52:32,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 23:52:32,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 23:52:32,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 23:52:32,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 23:52:32,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 23:52:32,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 23:52:32,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 23:52:32,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 23:52:32,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 23:52:32,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 23:52:32,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 23:52:32,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 23:52:32,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 23:52:32,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 23:52:32,911 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 23:52:32,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 23:52:32,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 23:52:32,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 23:52:32,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 23:52:32,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 23:52:32,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 23:52:32,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 23:52:32,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 23:52:32,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 23:52:32,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 23:52:32,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 23:52:32,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 23:52:32,916 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 23:52:32,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 23:52:32,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 23:52:32,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e983f35cff7a0c67962e23f6c3d66292f25c728e4d1df204c975f306d1512a3 [2022-07-22 23:52:33,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 23:52:33,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 23:52:33,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 23:52:33,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 23:52:33,155 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 23:52:33,156 INFO L432 ainManager$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--usb--cx82310_eth.ko-entry_point.cil.out.i [2022-07-22 23:52:33,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fb5b3e16/c0016212c89a4c148c11e97e63e7a1d6/FLAG08c9686d7 [2022-07-22 23:52:33,751 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 23:52:33,751 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--usb--cx82310_eth.ko-entry_point.cil.out.i [2022-07-22 23:52:33,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fb5b3e16/c0016212c89a4c148c11e97e63e7a1d6/FLAG08c9686d7 [2022-07-22 23:52:34,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fb5b3e16/c0016212c89a4c148c11e97e63e7a1d6 [2022-07-22 23:52:34,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 23:52:34,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 23:52:34,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 23:52:34,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 23:52:34,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 23:52:34,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:52:34" (1/1) ... [2022-07-22 23:52:34,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ac0659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:34, skipping insertion in model container [2022-07-22 23:52:34,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:52:34" (1/1) ... [2022-07-22 23:52:34,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 23:52:34,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 23:52:34,897 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i[159401,159414] [2022-07-22 23:52:35,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 23:52:35,147 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 23:52:35,245 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i[159401,159414] [2022-07-22 23:52:35,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 23:52:35,332 INFO L208 MainTranslator]: Completed translation [2022-07-22 23:52:35,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35 WrapperNode [2022-07-22 23:52:35,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 23:52:35,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 23:52:35,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 23:52:35,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 23:52:35,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,458 INFO L137 Inliner]: procedures = 102, calls = 315, calls flagged for inlining = 35, calls inlined = 32, statements flattened = 987 [2022-07-22 23:52:35,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 23:52:35,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 23:52:35,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 23:52:35,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 23:52:35,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 23:52:35,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 23:52:35,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 23:52:35,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 23:52:35,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (1/1) ... [2022-07-22 23:52:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 23:52:35,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:52:35,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 23:52:35,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 23:52:35,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-22 23:52:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-22 23:52:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-22 23:52:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-07-22 23:52:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-07-22 23:52:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-22 23:52:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-22 23:52:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 23:52:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_tx_fixup [2022-07-22 23:52:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_tx_fixup [2022-07-22 23:52:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2022-07-22 23:52:35,656 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2022-07-22 23:52:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-22 23:52:35,656 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-22 23:52:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-07-22 23:52:35,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-07-22 23:52:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-22 23:52:35,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-22 23:52:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_rx_fixup [2022-07-22 23:52:35,657 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_rx_fixup [2022-07-22 23:52:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2022-07-22 23:52:35,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2022-07-22 23:52:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-07-22 23:52:35,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-07-22 23:52:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-22 23:52:35,657 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-22 23:52:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 23:52:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-22 23:52:35,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-22 23:52:35,658 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2022-07-22 23:52:35,658 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2022-07-22 23:52:35,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-22 23:52:35,658 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-22 23:52:35,658 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_skb_return [2022-07-22 23:52:35,658 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_skb_return [2022-07-22 23:52:35,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 23:52:35,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 23:52:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 23:52:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 23:52:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 23:52:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 23:52:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 23:52:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 23:52:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 23:52:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-07-22 23:52:35,660 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-07-22 23:52:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-22 23:52:35,660 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-22 23:52:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_cmd [2022-07-22 23:52:35,660 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_cmd [2022-07-22 23:52:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 23:52:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-22 23:52:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-22 23:52:35,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-22 23:52:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 23:52:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 23:52:35,946 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 23:52:35,947 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 23:52:36,065 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-22 23:52:36,892 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 23:52:36,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 23:52:36,899 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 23:52:36,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:52:36 BoogieIcfgContainer [2022-07-22 23:52:36,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 23:52:36,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 23:52:36,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 23:52:36,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 23:52:36,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:52:34" (1/3) ... [2022-07-22 23:52:36,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129a4323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:52:36, skipping insertion in model container [2022-07-22 23:52:36,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:52:35" (2/3) ... [2022-07-22 23:52:36,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129a4323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:52:36, skipping insertion in model container [2022-07-22 23:52:36,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:52:36" (3/3) ... [2022-07-22 23:52:36,906 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2022-07-22 23:52:36,921 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 23:52:36,927 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 23:52:36,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 23:52:36,964 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63c6707d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@403346e3 [2022-07-22 23:52:36,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 23:52:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 306 states, 230 states have (on average 1.4) internal successors, (322), 236 states have internal predecessors, (322), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-07-22 23:52:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 23:52:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:36,975 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 23:52:36,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1372626135, now seen corresponding path program 1 times [2022-07-22 23:52:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:36,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591407430] [2022-07-22 23:52:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:37,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:37,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 23:52:37,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:37,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591407430] [2022-07-22 23:52:37,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591407430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:37,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:37,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 23:52:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645171833] [2022-07-22 23:52:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:37,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 23:52:37,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 23:52:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:52:37,424 INFO L87 Difference]: Start difference. First operand has 306 states, 230 states have (on average 1.4) internal successors, (322), 236 states have internal predecessors, (322), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:52:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:39,788 INFO L93 Difference]: Finished difference Result 1045 states and 1591 transitions. [2022-07-22 23:52:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 23:52:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-22 23:52:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:39,813 INFO L225 Difference]: With dead ends: 1045 [2022-07-22 23:52:39,819 INFO L226 Difference]: Without dead ends: 728 [2022-07-22 23:52:39,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:52:39,829 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 840 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:39,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 1239 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 23:52:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-07-22 23:52:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 553. [2022-07-22 23:52:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 423 states have (on average 1.375886524822695) internal successors, (582), 423 states have internal predecessors, (582), 94 states have call successors, (94), 36 states have call predecessors, (94), 35 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-07-22 23:52:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 769 transitions. [2022-07-22 23:52:39,928 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 769 transitions. Word has length 36 [2022-07-22 23:52:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:39,928 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 769 transitions. [2022-07-22 23:52:39,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:52:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 769 transitions. [2022-07-22 23:52:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 23:52:39,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:39,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:52:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 23:52:39,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2092020101, now seen corresponding path program 1 times [2022-07-22 23:52:39,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422290715] [2022-07-22 23:52:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:40,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:40,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:40,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:40,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 23:52:40,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:40,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422290715] [2022-07-22 23:52:40,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422290715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:40,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:40,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 23:52:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697638009] [2022-07-22 23:52:40,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:40,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 23:52:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 23:52:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 23:52:40,101 INFO L87 Difference]: Start difference. First operand 553 states and 769 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 23:52:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:41,800 INFO L93 Difference]: Finished difference Result 1975 states and 2881 transitions. [2022-07-22 23:52:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 23:52:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-07-22 23:52:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:41,814 INFO L225 Difference]: With dead ends: 1975 [2022-07-22 23:52:41,814 INFO L226 Difference]: Without dead ends: 1430 [2022-07-22 23:52:41,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:52:41,822 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 850 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:41,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 2258 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 23:52:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-07-22 23:52:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1163. [2022-07-22 23:52:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 897 states have (on average 1.3812709030100334) internal successors, (1239), 899 states have internal predecessors, (1239), 188 states have call successors, (188), 70 states have call predecessors, (188), 77 states have return successors, (215), 193 states have call predecessors, (215), 187 states have call successors, (215) [2022-07-22 23:52:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1642 transitions. [2022-07-22 23:52:41,913 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1642 transitions. Word has length 46 [2022-07-22 23:52:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:41,913 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1642 transitions. [2022-07-22 23:52:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 23:52:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1642 transitions. [2022-07-22 23:52:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 23:52:41,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:41,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 23:52:41,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 23:52:41,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2091695119, now seen corresponding path program 1 times [2022-07-22 23:52:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:41,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821998330] [2022-07-22 23:52:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 23:52:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 23:52:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:42,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821998330] [2022-07-22 23:52:42,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821998330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:42,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:42,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 23:52:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297031255] [2022-07-22 23:52:42,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:42,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 23:52:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 23:52:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 23:52:42,120 INFO L87 Difference]: Start difference. First operand 1163 states and 1642 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 23:52:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:43,503 INFO L93 Difference]: Finished difference Result 2875 states and 4169 transitions. [2022-07-22 23:52:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 23:52:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2022-07-22 23:52:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:43,512 INFO L225 Difference]: With dead ends: 2875 [2022-07-22 23:52:43,513 INFO L226 Difference]: Without dead ends: 1726 [2022-07-22 23:52:43,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:52:43,518 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 477 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:43,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1155 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 23:52:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-07-22 23:52:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1384. [2022-07-22 23:52:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1095 states have (on average 1.3990867579908677) internal successors, (1532), 1097 states have internal predecessors, (1532), 201 states have call successors, (201), 80 states have call predecessors, (201), 87 states have return successors, (228), 206 states have call predecessors, (228), 200 states have call successors, (228) [2022-07-22 23:52:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1961 transitions. [2022-07-22 23:52:43,567 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1961 transitions. Word has length 84 [2022-07-22 23:52:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:43,568 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1961 transitions. [2022-07-22 23:52:43,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 23:52:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1961 transitions. [2022-07-22 23:52:43,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 23:52:43,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:43,571 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:52:43,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 23:52:43,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1899779352, now seen corresponding path program 1 times [2022-07-22 23:52:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573333185] [2022-07-22 23:52:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:43,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 23:52:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:52:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 23:52:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 23:52:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 23:52:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:43,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573333185] [2022-07-22 23:52:43,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573333185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:43,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:43,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 23:52:43,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645101808] [2022-07-22 23:52:43,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 23:52:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 23:52:43,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 23:52:43,804 INFO L87 Difference]: Start difference. First operand 1384 states and 1961 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 23:52:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:46,944 INFO L93 Difference]: Finished difference Result 4181 states and 6057 transitions. [2022-07-22 23:52:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 23:52:46,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-07-22 23:52:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:46,971 INFO L225 Difference]: With dead ends: 4181 [2022-07-22 23:52:46,972 INFO L226 Difference]: Without dead ends: 2822 [2022-07-22 23:52:46,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-22 23:52:46,978 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 767 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:46,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 1688 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 23:52:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-07-22 23:52:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2180. [2022-07-22 23:52:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 1729 states have (on average 1.3846153846153846) internal successors, (2394), 1733 states have internal predecessors, (2394), 303 states have call successors, (303), 132 states have call predecessors, (303), 147 states have return successors, (347), 314 states have call predecessors, (347), 302 states have call successors, (347) [2022-07-22 23:52:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 3044 transitions. [2022-07-22 23:52:47,151 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 3044 transitions. Word has length 112 [2022-07-22 23:52:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:47,153 INFO L495 AbstractCegarLoop]: Abstraction has 2180 states and 3044 transitions. [2022-07-22 23:52:47,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 23:52:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 3044 transitions. [2022-07-22 23:52:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 23:52:47,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:47,170 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:52:47,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 23:52:47,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:47,171 INFO L85 PathProgramCache]: Analyzing trace with hash -80175978, now seen corresponding path program 1 times [2022-07-22 23:52:47,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:47,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166107892] [2022-07-22 23:52:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:47,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 23:52:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:52:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 23:52:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 23:52:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-22 23:52:47,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:47,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166107892] [2022-07-22 23:52:47,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166107892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:47,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:47,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 23:52:47,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279787150] [2022-07-22 23:52:47,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:47,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 23:52:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 23:52:47,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-22 23:52:47,479 INFO L87 Difference]: Start difference. First operand 2180 states and 3044 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-22 23:52:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:49,715 INFO L93 Difference]: Finished difference Result 5056 states and 7336 transitions. [2022-07-22 23:52:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 23:52:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) Word has length 112 [2022-07-22 23:52:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:49,728 INFO L225 Difference]: With dead ends: 5056 [2022-07-22 23:52:49,729 INFO L226 Difference]: Without dead ends: 2901 [2022-07-22 23:52:49,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-07-22 23:52:49,734 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 286 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:49,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 2043 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 23:52:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2022-07-22 23:52:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2232. [2022-07-22 23:52:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 1765 states have (on average 1.3767705382436262) internal successors, (2430), 1777 states have internal predecessors, (2430), 303 states have call successors, (303), 132 states have call predecessors, (303), 163 states have return successors, (371), 322 states have call predecessors, (371), 302 states have call successors, (371) [2022-07-22 23:52:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3104 transitions. [2022-07-22 23:52:49,813 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3104 transitions. Word has length 112 [2022-07-22 23:52:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:49,815 INFO L495 AbstractCegarLoop]: Abstraction has 2232 states and 3104 transitions. [2022-07-22 23:52:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) [2022-07-22 23:52:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3104 transitions. [2022-07-22 23:52:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-22 23:52:49,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:49,820 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:52:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 23:52:49,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1707497592, now seen corresponding path program 1 times [2022-07-22 23:52:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:49,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136758928] [2022-07-22 23:52:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 23:52:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:52:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 23:52:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:49,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 23:52:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:50,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:50,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 23:52:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 23:52:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136758928] [2022-07-22 23:52:50,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136758928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:50,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:50,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 23:52:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368884222] [2022-07-22 23:52:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:50,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 23:52:50,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 23:52:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 23:52:50,132 INFO L87 Difference]: Start difference. First operand 2232 states and 3104 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 23:52:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:53,197 INFO L93 Difference]: Finished difference Result 5416 states and 7968 transitions. [2022-07-22 23:52:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 23:52:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-07-22 23:52:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:53,209 INFO L225 Difference]: With dead ends: 5416 [2022-07-22 23:52:53,209 INFO L226 Difference]: Without dead ends: 3209 [2022-07-22 23:52:53,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:52:53,216 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 275 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:53,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 2287 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 23:52:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2022-07-22 23:52:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2412. [2022-07-22 23:52:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 1877 states have (on average 1.3670751198721365) internal successors, (2566), 1893 states have internal predecessors, (2566), 359 states have call successors, (359), 132 states have call predecessors, (359), 175 states have return successors, (514), 386 states have call predecessors, (514), 358 states have call successors, (514) [2022-07-22 23:52:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3439 transitions. [2022-07-22 23:52:53,307 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3439 transitions. Word has length 118 [2022-07-22 23:52:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:53,308 INFO L495 AbstractCegarLoop]: Abstraction has 2412 states and 3439 transitions. [2022-07-22 23:52:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 23:52:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3439 transitions. [2022-07-22 23:52:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 23:52:53,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:53,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 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, 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] [2022-07-22 23:52:53,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 23:52:53,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash -916115273, now seen corresponding path program 1 times [2022-07-22 23:52:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:53,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198895838] [2022-07-22 23:52:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:53,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 23:52:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:52:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 23:52:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 23:52:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:52:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 23:52:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:52:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:52:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-22 23:52:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198895838] [2022-07-22 23:52:53,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198895838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:53,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:52:53,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 23:52:53,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450846880] [2022-07-22 23:52:53,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 23:52:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 23:52:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:52:53,560 INFO L87 Difference]: Start difference. First operand 2412 states and 3439 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (16), 7 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-22 23:52:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:54,926 INFO L93 Difference]: Finished difference Result 5636 states and 8291 transitions. [2022-07-22 23:52:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 23:52:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (16), 7 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 145 [2022-07-22 23:52:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:54,941 INFO L225 Difference]: With dead ends: 5636 [2022-07-22 23:52:54,941 INFO L226 Difference]: Without dead ends: 3249 [2022-07-22 23:52:54,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:52:54,949 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 373 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:54,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1251 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 23:52:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-07-22 23:52:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2424. [2022-07-22 23:52:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 1889 states have (on average 1.3647432503970354) internal successors, (2578), 1905 states have internal predecessors, (2578), 359 states have call successors, (359), 132 states have call predecessors, (359), 175 states have return successors, (514), 386 states have call predecessors, (514), 358 states have call successors, (514) [2022-07-22 23:52:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 3451 transitions. [2022-07-22 23:52:55,085 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 3451 transitions. Word has length 145 [2022-07-22 23:52:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:55,086 INFO L495 AbstractCegarLoop]: Abstraction has 2424 states and 3451 transitions. [2022-07-22 23:52:55,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (16), 7 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-22 23:52:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 3451 transitions. [2022-07-22 23:52:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 23:52:55,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:55,090 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 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, 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] [2022-07-22 23:52:55,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 23:52:55,090 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash -355415495, now seen corresponding path program 1 times [2022-07-22 23:52:55,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:55,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54394767] [2022-07-22 23:52:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:55,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:52:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:52:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 23:52:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:52:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 23:52:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 23:52:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:52:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 23:52:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:52:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:52:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 23:52:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:55,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54394767] [2022-07-22 23:52:55,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54394767] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:52:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006914873] [2022-07-22 23:52:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:55,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:52:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:52:55,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:52:55,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 23:52:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 23:52:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:52:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-22 23:52:55,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:52:55,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006914873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:52:55,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:52:55,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2022-07-22 23:52:55,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976186134] [2022-07-22 23:52:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:52:55,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:52:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:52:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-22 23:52:55,853 INFO L87 Difference]: Start difference. First operand 2424 states and 3451 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-22 23:52:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:52:55,986 INFO L93 Difference]: Finished difference Result 4833 states and 6887 transitions. [2022-07-22 23:52:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:52:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 145 [2022-07-22 23:52:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:52:56,009 INFO L225 Difference]: With dead ends: 4833 [2022-07-22 23:52:56,009 INFO L226 Difference]: Without dead ends: 2425 [2022-07-22 23:52:56,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-22 23:52:56,035 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 2 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:52:56,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1215 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 23:52:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-07-22 23:52:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2425. [2022-07-22 23:52:56,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 1890 states have (on average 1.3645502645502645) internal successors, (2579), 1906 states have internal predecessors, (2579), 359 states have call successors, (359), 132 states have call predecessors, (359), 175 states have return successors, (514), 386 states have call predecessors, (514), 358 states have call successors, (514) [2022-07-22 23:52:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 3452 transitions. [2022-07-22 23:52:56,178 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 3452 transitions. Word has length 145 [2022-07-22 23:52:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:52:56,178 INFO L495 AbstractCegarLoop]: Abstraction has 2425 states and 3452 transitions. [2022-07-22 23:52:56,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-22 23:52:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 3452 transitions. [2022-07-22 23:52:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 23:52:56,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:52:56,181 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:52:56,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 23:52:56,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:52:56,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:52:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:52:56,396 INFO L85 PathProgramCache]: Analyzing trace with hash 783242525, now seen corresponding path program 1 times [2022-07-22 23:52:56,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:52:56,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714150359] [2022-07-22 23:52:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:52:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:52:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:52:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 23:52:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 23:52:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 23:52:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:52:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:52:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 23:52:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:52:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 23:52:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:52:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:52:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:52:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 23:52:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:52:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714150359] [2022-07-22 23:52:56,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714150359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:52:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070632460] [2022-07-22 23:52:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:52:56,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:52:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:52:56,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:52:56,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 23:52:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:52:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 23:52:57,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:52:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 23:52:57,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:52:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 23:52:57,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070632460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:52:57,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:52:57,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2022-07-22 23:52:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483190020] [2022-07-22 23:52:57,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:52:57,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 23:52:57,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:52:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 23:52:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-07-22 23:52:57,420 INFO L87 Difference]: Start difference. First operand 2425 states and 3452 transitions. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 10 states have internal predecessors, (154), 2 states have call successors, (42), 7 states have call predecessors, (42), 5 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-07-22 23:53:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:53:00,127 INFO L93 Difference]: Finished difference Result 5661 states and 8264 transitions. [2022-07-22 23:53:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 23:53:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 10 states have internal predecessors, (154), 2 states have call successors, (42), 7 states have call predecessors, (42), 5 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 147 [2022-07-22 23:53:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:53:00,141 INFO L225 Difference]: With dead ends: 5661 [2022-07-22 23:53:00,141 INFO L226 Difference]: Without dead ends: 3250 [2022-07-22 23:53:00,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-07-22 23:53:00,147 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 283 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 23:53:00,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 2989 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 23:53:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2022-07-22 23:53:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2428. [2022-07-22 23:53:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2428 states, 1893 states have (on average 1.363972530375066) internal successors, (2582), 1909 states have internal predecessors, (2582), 359 states have call successors, (359), 132 states have call predecessors, (359), 175 states have return successors, (514), 386 states have call predecessors, (514), 358 states have call successors, (514) [2022-07-22 23:53:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 3455 transitions. [2022-07-22 23:53:00,233 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 3455 transitions. Word has length 147 [2022-07-22 23:53:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:53:00,234 INFO L495 AbstractCegarLoop]: Abstraction has 2428 states and 3455 transitions. [2022-07-22 23:53:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 10 states have internal predecessors, (154), 2 states have call successors, (42), 7 states have call predecessors, (42), 5 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-07-22 23:53:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 3455 transitions. [2022-07-22 23:53:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-22 23:53:00,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:53:00,237 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 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, 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] [2022-07-22 23:53:00,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 23:53:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 23:53:00,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:53:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:53:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash -672213703, now seen corresponding path program 2 times [2022-07-22 23:53:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:53:00,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548176212] [2022-07-22 23:53:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:53:00,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:53:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:53:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:53:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:53:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:53:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:53:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:53:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:53:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:53:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:53:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 23:53:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:01,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:01,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:53:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:01,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:53:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-22 23:53:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:53:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548176212] [2022-07-22 23:53:01,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548176212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:53:01,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:53:01,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 23:53:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885553106] [2022-07-22 23:53:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:53:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 23:53:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:53:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 23:53:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-07-22 23:53:01,374 INFO L87 Difference]: Start difference. First operand 2428 states and 3455 transitions. Second operand has 21 states, 20 states have (on average 4.7) internal successors, (94), 12 states have internal predecessors, (94), 4 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-22 23:53:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:53:05,375 INFO L93 Difference]: Finished difference Result 5909 states and 8830 transitions. [2022-07-22 23:53:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 23:53:05,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 12 states have internal predecessors, (94), 4 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 3 states have call successors, (15) Word has length 153 [2022-07-22 23:53:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:53:05,390 INFO L225 Difference]: With dead ends: 5909 [2022-07-22 23:53:05,390 INFO L226 Difference]: Without dead ends: 3510 [2022-07-22 23:53:05,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-07-22 23:53:05,398 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 321 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 3196 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 5921 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-22 23:53:05,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 5921 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3196 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-22 23:53:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-07-22 23:53:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2452. [2022-07-22 23:53:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 1913 states have (on average 1.3538944066910612) internal successors, (2590), 1921 states have internal predecessors, (2590), 363 states have call successors, (363), 132 states have call predecessors, (363), 175 states have return successors, (522), 398 states have call predecessors, (522), 362 states have call successors, (522) [2022-07-22 23:53:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3475 transitions. [2022-07-22 23:53:05,554 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3475 transitions. Word has length 153 [2022-07-22 23:53:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:53:05,554 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 3475 transitions. [2022-07-22 23:53:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 12 states have internal predecessors, (94), 4 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-22 23:53:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3475 transitions. [2022-07-22 23:53:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-22 23:53:05,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:53:05,558 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:53:05,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 23:53:05,559 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:53:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:53:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 728737592, now seen corresponding path program 1 times [2022-07-22 23:53:05,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:53:05,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366344027] [2022-07-22 23:53:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:53:05,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:53:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:53:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:53:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:53:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:53:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:53:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:53:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:53:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:53:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:53:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:53:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:53:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-22 23:53:06,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:53:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366344027] [2022-07-22 23:53:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366344027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:53:06,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:53:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 23:53:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884819563] [2022-07-22 23:53:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:53:06,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 23:53:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:53:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 23:53:06,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-22 23:53:06,059 INFO L87 Difference]: Start difference. First operand 2452 states and 3475 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 10 states have internal predecessors, (81), 3 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:53:07,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:53:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:53:10,845 INFO L93 Difference]: Finished difference Result 5821 states and 8506 transitions. [2022-07-22 23:53:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 23:53:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 10 states have internal predecessors, (81), 3 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) Word has length 133 [2022-07-22 23:53:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:53:10,857 INFO L225 Difference]: With dead ends: 5821 [2022-07-22 23:53:10,857 INFO L226 Difference]: Without dead ends: 3398 [2022-07-22 23:53:10,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-07-22 23:53:10,863 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 244 mSDsluCounter, 5228 mSDsCounter, 0 mSdLazyCounter, 2992 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 5704 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:53:10,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 5704 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2992 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-22 23:53:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2022-07-22 23:53:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 2468. [2022-07-22 23:53:10,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 1929 states have (on average 1.3509590461378953) internal successors, (2606), 1929 states have internal predecessors, (2606), 363 states have call successors, (363), 132 states have call predecessors, (363), 175 states have return successors, (522), 406 states have call predecessors, (522), 362 states have call successors, (522) [2022-07-22 23:53:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3491 transitions. [2022-07-22 23:53:10,985 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3491 transitions. Word has length 133 [2022-07-22 23:53:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:53:10,985 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 3491 transitions. [2022-07-22 23:53:10,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 10 states have internal predecessors, (81), 3 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:53:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3491 transitions. [2022-07-22 23:53:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-22 23:53:10,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:53:10,991 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-22 23:53:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 23:53:10,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:53:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:53:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash -900196334, now seen corresponding path program 1 times [2022-07-22 23:53:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:53:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280666789] [2022-07-22 23:53:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:53:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:53:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:53:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:53:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:53:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:53:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:53:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:53:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:53:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:53:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:53:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 23:53:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:53:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:53:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:53:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-22 23:53:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 23:53:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:53:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-07-22 23:53:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:53:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280666789] [2022-07-22 23:53:11,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280666789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:53:11,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:53:11,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 23:53:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295115227] [2022-07-22 23:53:11,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:53:11,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 23:53:11,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:53:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 23:53:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 23:53:11,332 INFO L87 Difference]: Start difference. First operand 2468 states and 3491 transitions. Second operand has 11 states, 10 states have (on average 10.7) internal successors, (107), 6 states have internal predecessors, (107), 4 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2022-07-22 23:53:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:53:14,952 INFO L93 Difference]: Finished difference Result 7213 states and 11094 transitions. [2022-07-22 23:53:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 23:53:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 6 states have internal predecessors, (107), 4 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 183 [2022-07-22 23:53:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:53:14,968 INFO L225 Difference]: With dead ends: 7213 [2022-07-22 23:53:14,968 INFO L226 Difference]: Without dead ends: 4774 [2022-07-22 23:53:14,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-22 23:53:14,975 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 360 mSDsluCounter, 2727 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 23:53:14,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 3276 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 23:53:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2022-07-22 23:53:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 2844. [2022-07-22 23:53:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2217 states have (on average 1.363103292737934) internal successors, (3022), 2217 states have internal predecessors, (3022), 443 states have call successors, (443), 132 states have call predecessors, (443), 183 states have return successors, (722), 494 states have call predecessors, (722), 442 states have call successors, (722) [2022-07-22 23:53:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 4187 transitions. [2022-07-22 23:53:15,128 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 4187 transitions. Word has length 183 [2022-07-22 23:53:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:53:15,129 INFO L495 AbstractCegarLoop]: Abstraction has 2844 states and 4187 transitions. [2022-07-22 23:53:15,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.7) internal successors, (107), 6 states have internal predecessors, (107), 4 states have call successors, (20), 7 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2022-07-22 23:53:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 4187 transitions. [2022-07-22 23:53:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 23:53:15,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:53:15,135 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-22 23:53:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 23:53:15,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:53:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:53:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash 536068470, now seen corresponding path program 1 times [2022-07-22 23:53:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:53:15,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239067749] [2022-07-22 23:53:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:53:15,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:53:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:53:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:53:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:53:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:53:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:53:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:53:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:53:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:15,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:53:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:53:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:53:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:53:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:53:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:53:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 23:53:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 23:53:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-22 23:53:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:53:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-22 23:53:16,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:53:16,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239067749] [2022-07-22 23:53:16,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239067749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:53:16,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019232468] [2022-07-22 23:53:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:53:16,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:53:16,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:53:16,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:53:16,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 23:53:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:53:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-22 23:53:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:53:22,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 23:53:36,908 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 23:53:36,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-22 23:53:41,145 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-22 23:53:41,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 36 [2022-07-22 23:53:41,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-07-22 23:53:41,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-07-22 23:53:41,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-07-22 23:53:43,465 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 23:53:43,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 31 [2022-07-22 23:53:43,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-22 23:53:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 23:53:43,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:53:44,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 327 treesize of output 309 [2022-07-22 23:53:44,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 270 [2022-07-22 23:53:44,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 254 [2022-07-22 23:53:44,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 246 [2022-07-22 23:53:44,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019232468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:53:44,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:53:44,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 27] total 63 [2022-07-22 23:53:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21299130] [2022-07-22 23:53:44,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 23:53:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 23:53:44,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:53:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 23:53:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=4305, Unknown=61, NotChecked=0, Total=4692 [2022-07-22 23:53:44,700 INFO L87 Difference]: Start difference. First operand 2844 states and 4187 transitions. Second operand has 63 states, 63 states have (on average 3.4761904761904763) internal successors, (219), 49 states have internal predecessors, (219), 22 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (39), 26 states have call predecessors, (39), 21 states have call successors, (39) [2022-07-22 23:53:47,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:53:53,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:53:55,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:55:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:55:00,274 INFO L93 Difference]: Finished difference Result 22977 states and 35858 transitions. [2022-07-22 23:55:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-07-22 23:55:00,275 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4761904761904763) internal successors, (219), 49 states have internal predecessors, (219), 22 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (39), 26 states have call predecessors, (39), 21 states have call successors, (39) Word has length 184 [2022-07-22 23:55:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:55:00,353 INFO L225 Difference]: With dead ends: 22977 [2022-07-22 23:55:00,354 INFO L226 Difference]: Without dead ends: 20096 [2022-07-22 23:55:00,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 276 SyntacticMatches, 5 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22734 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=3779, Invalid=57838, Unknown=135, NotChecked=0, Total=61752 [2022-07-22 23:55:00,381 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 4346 mSDsluCounter, 13694 mSDsCounter, 0 mSdLazyCounter, 21921 mSolverCounterSat, 2459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4487 SdHoareTripleChecker+Valid, 14449 SdHoareTripleChecker+Invalid, 29308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2459 IncrementalHoareTripleChecker+Valid, 21921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4928 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2022-07-22 23:55:00,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4487 Valid, 14449 Invalid, 29308 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2459 Valid, 21921 Invalid, 0 Unknown, 4928 Unchecked, 32.8s Time] [2022-07-22 23:55:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20096 states. [2022-07-22 23:55:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20096 to 15834. [2022-07-22 23:55:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15834 states, 12396 states have (on average 1.3757663762504033) internal successors, (17054), 12525 states have internal predecessors, (17054), 2434 states have call successors, (2434), 622 states have call predecessors, (2434), 1003 states have return successors, (5219), 2686 states have call predecessors, (5219), 2433 states have call successors, (5219) [2022-07-22 23:55:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15834 states to 15834 states and 24707 transitions. [2022-07-22 23:55:01,943 INFO L78 Accepts]: Start accepts. Automaton has 15834 states and 24707 transitions. Word has length 184 [2022-07-22 23:55:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:55:01,944 INFO L495 AbstractCegarLoop]: Abstraction has 15834 states and 24707 transitions. [2022-07-22 23:55:01,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4761904761904763) internal successors, (219), 49 states have internal predecessors, (219), 22 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (39), 26 states have call predecessors, (39), 21 states have call successors, (39) [2022-07-22 23:55:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15834 states and 24707 transitions. [2022-07-22 23:55:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 23:55:01,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:55:01,973 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:55:01,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 23:55:02,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:55:02,196 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:55:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:55:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1288410356, now seen corresponding path program 1 times [2022-07-22 23:55:02,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:55:02,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638711746] [2022-07-22 23:55:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:55:02,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:55:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:55:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:55:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:55:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:55:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:55:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:55:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:55:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:55:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:02,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:55:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:55:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:55:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:55:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:55:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 23:55:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 23:55:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 23:55:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 23:55:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 23:55:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:55:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 23:55:03,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:55:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638711746] [2022-07-22 23:55:03,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638711746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:55:03,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269360817] [2022-07-22 23:55:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:55:03,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:55:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:55:03,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:55:03,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 23:55:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-22 23:55:04,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:55:05,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 23:55:05,787 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 23:55:05,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-22 23:55:06,022 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-22 23:55:06,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-07-22 23:55:06,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-22 23:55:06,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-22 23:55:06,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2022-07-22 23:55:06,309 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-22 23:55:06,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2022-07-22 23:55:06,824 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 23:55:06,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2022-07-22 23:55:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 59 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 23:55:06,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:55:07,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 308 [2022-07-22 23:55:07,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 270 [2022-07-22 23:55:07,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 254 [2022-07-22 23:55:07,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 246 [2022-07-22 23:55:07,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269360817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:55:07,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:55:07,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31] total 65 [2022-07-22 23:55:07,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569768572] [2022-07-22 23:55:07,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 23:55:07,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 23:55:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:55:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 23:55:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=4697, Unknown=28, NotChecked=0, Total=5112 [2022-07-22 23:55:07,958 INFO L87 Difference]: Start difference. First operand 15834 states and 24707 transitions. Second operand has 65 states, 61 states have (on average 3.377049180327869) internal successors, (206), 51 states have internal predecessors, (206), 23 states have call successors, (39), 11 states have call predecessors, (39), 21 states have return successors, (38), 24 states have call predecessors, (38), 22 states have call successors, (38) [2022-07-22 23:55:09,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:55:14,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:55:20,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:55:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:55:54,170 INFO L93 Difference]: Finished difference Result 95835 states and 157326 transitions. [2022-07-22 23:55:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-07-22 23:55:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 61 states have (on average 3.377049180327869) internal successors, (206), 51 states have internal predecessors, (206), 23 states have call successors, (39), 11 states have call predecessors, (39), 21 states have return successors, (38), 24 states have call predecessors, (38), 22 states have call successors, (38) Word has length 169 [2022-07-22 23:55:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:55:54,646 INFO L225 Difference]: With dead ends: 95835 [2022-07-22 23:55:54,647 INFO L226 Difference]: Without dead ends: 77927 [2022-07-22 23:55:54,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13962 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2857, Invalid=38498, Unknown=57, NotChecked=0, Total=41412 [2022-07-22 23:55:54,763 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 4447 mSDsluCounter, 16808 mSDsCounter, 0 mSdLazyCounter, 25604 mSolverCounterSat, 2720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4755 SdHoareTripleChecker+Valid, 17654 SdHoareTripleChecker+Invalid, 38139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2720 IncrementalHoareTripleChecker+Valid, 25604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9815 IncrementalHoareTripleChecker+Unchecked, 33.9s IncrementalHoareTripleChecker+Time [2022-07-22 23:55:54,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4755 Valid, 17654 Invalid, 38139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2720 Valid, 25604 Invalid, 0 Unknown, 9815 Unchecked, 33.9s Time] [2022-07-22 23:55:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77927 states. [2022-07-22 23:55:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77927 to 55186. [2022-07-22 23:55:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55186 states, 42824 states have (on average 1.3729917803101064) internal successors, (58797), 43121 states have internal predecessors, (58797), 9291 states have call successors, (9291), 2156 states have call predecessors, (9291), 3070 states have return successors, (19268), 9908 states have call predecessors, (19268), 9290 states have call successors, (19268) [2022-07-22 23:55:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55186 states to 55186 states and 87356 transitions. [2022-07-22 23:55:59,429 INFO L78 Accepts]: Start accepts. Automaton has 55186 states and 87356 transitions. Word has length 169 [2022-07-22 23:55:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:55:59,431 INFO L495 AbstractCegarLoop]: Abstraction has 55186 states and 87356 transitions. [2022-07-22 23:55:59,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 61 states have (on average 3.377049180327869) internal successors, (206), 51 states have internal predecessors, (206), 23 states have call successors, (39), 11 states have call predecessors, (39), 21 states have return successors, (38), 24 states have call predecessors, (38), 22 states have call successors, (38) [2022-07-22 23:55:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 55186 states and 87356 transitions. [2022-07-22 23:55:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-22 23:55:59,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:55:59,500 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-22 23:55:59,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 23:55:59,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:55:59,721 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:55:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:55:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1231575636, now seen corresponding path program 1 times [2022-07-22 23:55:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:55:59,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724657766] [2022-07-22 23:55:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:55:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:55:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:55:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:55:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:55:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:55:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:55:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:55:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:55:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:55:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:55:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:55:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:55:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 23:55:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:55:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:55:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:56:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:56:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 23:56:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 23:56:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 23:56:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-22 23:56:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 23:56:00,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:56:00,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724657766] [2022-07-22 23:56:00,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724657766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:56:00,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172015008] [2022-07-22 23:56:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:56:00,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:56:00,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:56:00,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:56:00,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 23:56:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:00,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 23:56:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:56:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-22 23:56:00,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:56:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 23:56:00,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172015008] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 23:56:00,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:56:00,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12, 5] total 13 [2022-07-22 23:56:00,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821946425] [2022-07-22 23:56:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:56:00,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:56:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:56:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:56:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:56:00,723 INFO L87 Difference]: Start difference. First operand 55186 states and 87356 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 23:56:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:56:04,752 INFO L93 Difference]: Finished difference Result 110335 states and 177207 transitions. [2022-07-22 23:56:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:56:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 190 [2022-07-22 23:56:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:56:05,165 INFO L225 Difference]: With dead ends: 110335 [2022-07-22 23:56:05,165 INFO L226 Difference]: Without dead ends: 55324 [2022-07-22 23:56:05,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 414 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:56:05,314 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 4 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 23:56:05,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 805 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 23:56:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55324 states. [2022-07-22 23:56:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55324 to 55308. [2022-07-22 23:56:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55308 states, 42946 states have (on average 1.3719321939179434) internal successors, (58919), 43243 states have internal predecessors, (58919), 9291 states have call successors, (9291), 2156 states have call predecessors, (9291), 3070 states have return successors, (19268), 9908 states have call predecessors, (19268), 9290 states have call successors, (19268) [2022-07-22 23:56:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55308 states to 55308 states and 87478 transitions. [2022-07-22 23:56:09,403 INFO L78 Accepts]: Start accepts. Automaton has 55308 states and 87478 transitions. Word has length 190 [2022-07-22 23:56:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:56:09,403 INFO L495 AbstractCegarLoop]: Abstraction has 55308 states and 87478 transitions. [2022-07-22 23:56:09,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 23:56:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 55308 states and 87478 transitions. [2022-07-22 23:56:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-22 23:56:09,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:56:09,487 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-22 23:56:09,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 23:56:09,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 23:56:09,708 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:56:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:56:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 263964532, now seen corresponding path program 1 times [2022-07-22 23:56:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:56:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631445599] [2022-07-22 23:56:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:56:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:56:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:56:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:56:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:56:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:56:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:56:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:56:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:56:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:09,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:56:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:56:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:56:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 23:56:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:56:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:56:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:56:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 23:56:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-07-22 23:56:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-22 23:56:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-22 23:56:10,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:56:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631445599] [2022-07-22 23:56:10,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631445599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:56:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205758803] [2022-07-22 23:56:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:56:10,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:56:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:56:10,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:56:10,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 23:56:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 23:56:10,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:56:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 23:56:10,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:56:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-22 23:56:10,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205758803] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 23:56:10,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:56:10,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 14 [2022-07-22 23:56:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346478469] [2022-07-22 23:56:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:56:10,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 23:56:10,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:56:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 23:56:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-22 23:56:10,928 INFO L87 Difference]: Start difference. First operand 55308 states and 87478 transitions. Second operand has 5 states, 4 states have (on average 28.0) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 23:56:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:56:17,992 INFO L93 Difference]: Finished difference Result 135533 states and 221596 transitions. [2022-07-22 23:56:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 23:56:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 28.0) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 192 [2022-07-22 23:56:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:56:18,384 INFO L225 Difference]: With dead ends: 135533 [2022-07-22 23:56:18,385 INFO L226 Difference]: Without dead ends: 80400 [2022-07-22 23:56:18,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-22 23:56:18,572 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 60 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 23:56:18,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1776 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 23:56:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80400 states. [2022-07-22 23:56:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80400 to 64527. [2022-07-22 23:56:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64527 states, 49937 states have (on average 1.3766946352404028) internal successors, (68748), 50045 states have internal predecessors, (68748), 11511 states have call successors, (11511), 2156 states have call predecessors, (11511), 3078 states have return successors, (24035), 12325 states have call predecessors, (24035), 11510 states have call successors, (24035) [2022-07-22 23:56:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64527 states to 64527 states and 104294 transitions. [2022-07-22 23:56:24,309 INFO L78 Accepts]: Start accepts. Automaton has 64527 states and 104294 transitions. Word has length 192 [2022-07-22 23:56:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:56:24,310 INFO L495 AbstractCegarLoop]: Abstraction has 64527 states and 104294 transitions. [2022-07-22 23:56:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 28.0) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-07-22 23:56:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 64527 states and 104294 transitions. [2022-07-22 23:56:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-22 23:56:24,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:56:24,370 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2022-07-22 23:56:24,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 23:56:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 23:56:24,586 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:56:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:56:24,587 INFO L85 PathProgramCache]: Analyzing trace with hash 54909611, now seen corresponding path program 1 times [2022-07-22 23:56:24,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:56:24,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600793021] [2022-07-22 23:56:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:56:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:56:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:56:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 23:56:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:56:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 23:56:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 23:56:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:56:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:56:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:56:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 23:56:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:56:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 23:56:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:56:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 23:56:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-22 23:56:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-22 23:56:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 23:56:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 23:56:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:56:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:56:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-07-22 23:56:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:56:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600793021] [2022-07-22 23:56:24,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600793021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:56:24,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:56:24,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 23:56:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395944106] [2022-07-22 23:56:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:56:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 23:56:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:56:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 23:56:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:56:24,833 INFO L87 Difference]: Start difference. First operand 64527 states and 104294 transitions. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (21), 7 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-22 23:56:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:56:35,087 INFO L93 Difference]: Finished difference Result 143000 states and 233206 transitions. [2022-07-22 23:56:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 23:56:35,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (21), 7 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 193 [2022-07-22 23:56:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:56:35,635 INFO L225 Difference]: With dead ends: 143000 [2022-07-22 23:56:35,636 INFO L226 Difference]: Without dead ends: 78648 [2022-07-22 23:56:35,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-22 23:56:35,918 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 193 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 23:56:35,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 2035 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 23:56:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78648 states.