./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 839c364b 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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:45:33,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:45:33,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:45:33,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:45:33,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:45:33,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:45:33,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:45:33,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:45:33,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:45:33,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:45:33,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:45:33,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:45:33,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:45:33,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:45:33,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:45:33,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:45:33,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:45:33,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:45:33,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:45:33,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:45:33,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:45:33,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:45:33,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:45:33,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:45:33,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:45:33,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:45:33,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:45:33,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:45:33,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:45:33,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:45:33,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:45:33,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:45:33,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:45:33,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:45:33,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:45:33,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:45:33,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:45:33,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:45:33,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:45:33,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:45:33,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:45:33,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:45:33,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:45:33,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:45:33,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:45:33,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:45:33,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:45:33,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:45:33,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:45:33,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:45:33,359 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:45:33,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:45:33,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:45:33,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:45:33,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:45:33,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:45:33,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:45:33,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:45:33,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:45:33,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:45:33,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:45:33,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:45:33,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:45:33,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:45:33,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:45:33,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:45:33,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:45:33,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:45:33,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:45:33,365 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:45:33,365 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:45:33,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:45:33,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:45:33,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e983f35cff7a0c67962e23f6c3d66292f25c728e4d1df204c975f306d1512a3 [2021-12-14 17:45:33,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:45:33,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:45:33,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:45:33,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:45:33,626 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:45:33,627 INFO L432 ainManager$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 [2021-12-14 17:45:33,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34eaadb0a/6ad3db3a15164a2595b832408965c672/FLAG0d1676201 [2021-12-14 17:45:34,424 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:45:34,425 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 [2021-12-14 17:45:34,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34eaadb0a/6ad3db3a15164a2595b832408965c672/FLAG0d1676201 [2021-12-14 17:45:34,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34eaadb0a/6ad3db3a15164a2595b832408965c672 [2021-12-14 17:45:34,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:45:34,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:45:34,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:45:34,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:45:34,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:45:34,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:45:34" (1/1) ... [2021-12-14 17:45:34,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9169d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:34, skipping insertion in model container [2021-12-14 17:45:34,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:45:34" (1/1) ... [2021-12-14 17:45:34,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:45:34,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:45:35,369 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/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] [2021-12-14 17:45:35,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:45:35,613 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:45:35,717 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] [2021-12-14 17:45:35,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:45:35,835 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:45:35,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35 WrapperNode [2021-12-14 17:45:35,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:45:35,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:45:35,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:45:35,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:45:35,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:35,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:35,950 INFO L137 Inliner]: procedures = 102, calls = 313, calls flagged for inlining = 35, calls inlined = 32, statements flattened = 971 [2021-12-14 17:45:35,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:45:35,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:45:35,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:45:35,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:45:35,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:35,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:35,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:35,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:36,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:36,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:36,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:36,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:45:36,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:45:36,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:45:36,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:45:36,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (1/1) ... [2021-12-14 17:45:36,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:45:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:36,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:45:36,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:45:36,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:45:36,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:45:36,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:45:36,125 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-14 17:45:36,125 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-14 17:45:36,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:45:36,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:45:36,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:45:36,126 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_tx_fixup [2021-12-14 17:45:36,126 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_tx_fixup [2021-12-14 17:45:36,126 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-12-14 17:45:36,127 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-12-14 17:45:36,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:45:36,127 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:45:36,127 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-14 17:45:36,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-14 17:45:36,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:45:36,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:45:36,128 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_rx_fixup [2021-12-14 17:45:36,128 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_rx_fixup [2021-12-14 17:45:36,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2021-12-14 17:45:36,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2021-12-14 17:45:36,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-14 17:45:36,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-14 17:45:36,129 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:45:36,129 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:45:36,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:45:36,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:45:36,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:45:36,129 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-14 17:45:36,130 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-14 17:45:36,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:45:36,130 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:45:36,130 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_skb_return [2021-12-14 17:45:36,130 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_skb_return [2021-12-14 17:45:36,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:45:36,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:45:36,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:45:36,132 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-14 17:45:36,132 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-14 17:45:36,132 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-14 17:45:36,132 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-14 17:45:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_cmd [2021-12-14 17:45:36,133 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_cmd [2021-12-14 17:45:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:45:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:45:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:45:36,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:45:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:45:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:45:36,551 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:45:36,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:45:36,680 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:45:38,122 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:45:38,136 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:45:38,136 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 17:45:38,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:45:38 BoogieIcfgContainer [2021-12-14 17:45:38,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:45:38,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:45:38,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:45:38,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:45:38,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:45:34" (1/3) ... [2021-12-14 17:45:38,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5076627c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:45:38, skipping insertion in model container [2021-12-14 17:45:38,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:35" (2/3) ... [2021-12-14 17:45:38,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5076627c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:45:38, skipping insertion in model container [2021-12-14 17:45:38,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:45:38" (3/3) ... [2021-12-14 17:45:38,149 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 [2021-12-14 17:45:38,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:45:38,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:45:38,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:45:38,213 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:45:38,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:45:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 301 states, 225 states have (on average 1.3911111111111112) internal successors, (313), 231 states have internal predecessors, (313), 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) [2021-12-14 17:45:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 17:45:38,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:38,256 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:45:38,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:38,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1543576195, now seen corresponding path program 1 times [2021-12-14 17:45:38,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:38,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146352710] [2021-12-14 17:45:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:38,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:38,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:38,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:38,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 17:45:38,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:38,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146352710] [2021-12-14 17:45:38,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146352710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:38,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:38,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:45:38,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375030582] [2021-12-14 17:45:38,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:38,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:45:38,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:45:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:45:38,842 INFO L87 Difference]: Start difference. First operand has 301 states, 225 states have (on average 1.3911111111111112) internal successors, (313), 231 states have internal predecessors, (313), 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) [2021-12-14 17:45:40,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 17:45:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:41,878 INFO L93 Difference]: Finished difference Result 1020 states and 1546 transitions. [2021-12-14 17:45:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:45:41,881 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 [2021-12-14 17:45:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:41,895 INFO L225 Difference]: With dead ends: 1020 [2021-12-14 17:45:41,895 INFO L226 Difference]: Without dead ends: 708 [2021-12-14 17:45:41,901 INFO L932 BasicCegarLoop]: 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 [2021-12-14 17:45:41,904 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 800 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:41,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 1245 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 17:45:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-14 17:45:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 543. [2021-12-14 17:45:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 413 states have (on average 1.3704600484261502) internal successors, (566), 413 states have internal predecessors, (566), 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) [2021-12-14 17:45:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 753 transitions. [2021-12-14 17:45:41,994 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 753 transitions. Word has length 36 [2021-12-14 17:45:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:41,994 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 753 transitions. [2021-12-14 17:45:41,995 INFO L471 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) [2021-12-14 17:45:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 753 transitions. [2021-12-14 17:45:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 17:45:41,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:41,998 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:45:41,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:45:41,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:41,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1367673217, now seen corresponding path program 1 times [2021-12-14 17:45:42,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:42,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001232937] [2021-12-14 17:45:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:42,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:42,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:42,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:42,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 17:45:42,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001232937] [2021-12-14 17:45:42,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001232937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:42,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:42,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:42,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275147016] [2021-12-14 17:45:42,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:42,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:42,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:42,157 INFO L87 Difference]: Start difference. First operand 543 states and 753 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) [2021-12-14 17:45:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:43,922 INFO L93 Difference]: Finished difference Result 1925 states and 2801 transitions. [2021-12-14 17:45:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:45:43,927 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 [2021-12-14 17:45:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:43,936 INFO L225 Difference]: With dead ends: 1925 [2021-12-14 17:45:43,937 INFO L226 Difference]: Without dead ends: 1390 [2021-12-14 17:45:43,939 INFO L932 BasicCegarLoop]: 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 [2021-12-14 17:45:43,940 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 799 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:43,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 2407 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 17:45:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-12-14 17:45:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1133. [2021-12-14 17:45:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 867 states have (on average 1.3737024221453287) internal successors, (1191), 869 states have internal predecessors, (1191), 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) [2021-12-14 17:45:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1594 transitions. [2021-12-14 17:45:44,025 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1594 transitions. Word has length 46 [2021-12-14 17:45:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:44,025 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 1594 transitions. [2021-12-14 17:45:44,026 INFO L471 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) [2021-12-14 17:45:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1594 transitions. [2021-12-14 17:45:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 17:45:44,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:44,034 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:45:44,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:45:44,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1207773749, now seen corresponding path program 1 times [2021-12-14 17:45:44,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:44,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714946148] [2021-12-14 17:45:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:44,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:45:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 17:45:44,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:44,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714946148] [2021-12-14 17:45:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714946148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:44,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:44,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:45:44,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083778479] [2021-12-14 17:45:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:44,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:45:44,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:45:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:45:44,228 INFO L87 Difference]: Start difference. First operand 1133 states and 1594 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:45:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:46,189 INFO L93 Difference]: Finished difference Result 2745 states and 3951 transitions. [2021-12-14 17:45:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:45:46,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (9), 4 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 [2021-12-14 17:45:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:46,200 INFO L225 Difference]: With dead ends: 2745 [2021-12-14 17:45:46,200 INFO L226 Difference]: Without dead ends: 1626 [2021-12-14 17:45:46,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:46,206 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 238 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:46,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1326 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 17:45:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-14 17:45:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1354. [2021-12-14 17:45:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1065 states have (on average 1.3934272300469484) internal successors, (1484), 1067 states have internal predecessors, (1484), 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) [2021-12-14 17:45:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1913 transitions. [2021-12-14 17:45:46,279 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1913 transitions. Word has length 84 [2021-12-14 17:45:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:46,280 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1913 transitions. [2021-12-14 17:45:46,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:45:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1913 transitions. [2021-12-14 17:45:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:45:46,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:46,286 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:45:46,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:45:46,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1259796470, now seen corresponding path program 1 times [2021-12-14 17:45:46,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:46,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570208599] [2021-12-14 17:45:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:46,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:45:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:45:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:45:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:45:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-14 17:45:46,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570208599] [2021-12-14 17:45:46,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570208599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:46,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:46,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:45:46,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009925040] [2021-12-14 17:45:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:46,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:45:46,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:45:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:45:46,518 INFO L87 Difference]: Start difference. First operand 1354 states and 1913 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:45:48,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:48,340 INFO L93 Difference]: Finished difference Result 3951 states and 5677 transitions. [2021-12-14 17:45:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:45:48,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 4 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 [2021-12-14 17:45:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:48,354 INFO L225 Difference]: With dead ends: 3951 [2021-12-14 17:45:48,355 INFO L226 Difference]: Without dead ends: 2622 [2021-12-14 17:45:48,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:45:48,366 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 686 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:48,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1404 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 17:45:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-12-14 17:45:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2120. [2021-12-14 17:45:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 1669 states have (on average 1.3768723786698622) internal successors, (2298), 1673 states have internal predecessors, (2298), 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) [2021-12-14 17:45:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2948 transitions. [2021-12-14 17:45:48,502 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2948 transitions. Word has length 112 [2021-12-14 17:45:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:48,503 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 2948 transitions. [2021-12-14 17:45:48,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 17:45:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2948 transitions. [2021-12-14 17:45:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 17:45:48,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:48,507 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:45:48,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:45:48,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash 257111116, now seen corresponding path program 1 times [2021-12-14 17:45:48,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:48,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18755081] [2021-12-14 17:45:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:48,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:45:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:45:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:45:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:45:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:45:48,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18755081] [2021-12-14 17:45:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18755081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:48,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:48,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 17:45:48,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278610080] [2021-12-14 17:45:48,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:48,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 17:45:48,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 17:45:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:45:48,872 INFO L87 Difference]: Start difference. First operand 2120 states and 2948 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-14 17:45:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:50,579 INFO L93 Difference]: Finished difference Result 4700 states and 6784 transitions. [2021-12-14 17:45:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:45:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) Word has length 112 [2021-12-14 17:45:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:50,597 INFO L225 Difference]: With dead ends: 4700 [2021-12-14 17:45:50,597 INFO L226 Difference]: Without dead ends: 2605 [2021-12-14 17:45:50,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-14 17:45:50,605 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 275 mSDsluCounter, 2126 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:50,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 2511 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 17:45:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-12-14 17:45:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2120. [2021-12-14 17:45:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 1661 states have (on average 1.3690547862733293) internal successors, (2274), 1669 states have internal predecessors, (2274), 303 states have call successors, (303), 132 states have call predecessors, (303), 155 states have return successors, (360), 318 states have call predecessors, (360), 302 states have call successors, (360) [2021-12-14 17:45:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2937 transitions. [2021-12-14 17:45:50,709 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2937 transitions. Word has length 112 [2021-12-14 17:45:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:50,709 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 2937 transitions. [2021-12-14 17:45:50,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-14 17:45:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2937 transitions. [2021-12-14 17:45:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-14 17:45:50,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:50,715 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:50,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:45:50,716 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash 473324826, now seen corresponding path program 1 times [2021-12-14 17:45:50,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:50,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840781029] [2021-12-14 17:45:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:50,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:45:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:45:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:45:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:45:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 17:45:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-14 17:45:50,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:50,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840781029] [2021-12-14 17:45:50,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840781029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:50,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918413228] [2021-12-14 17:45:50,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:50,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:50,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:50,989 INFO L87 Difference]: Start difference. First operand 2120 states and 2937 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:45:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:53,066 INFO L93 Difference]: Finished difference Result 5060 states and 7313 transitions. [2021-12-14 17:45:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:45:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 137 [2021-12-14 17:45:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:53,082 INFO L225 Difference]: With dead ends: 5060 [2021-12-14 17:45:53,082 INFO L226 Difference]: Without dead ends: 2965 [2021-12-14 17:45:53,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:45:53,089 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 396 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1245 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 17:45:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-14 17:45:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2308. [2021-12-14 17:45:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 1781 states have (on average 1.3599101628298709) internal successors, (2422), 1797 states have internal predecessors, (2422), 359 states have call successors, (359), 132 states have call predecessors, (359), 167 states have return successors, (494), 378 states have call predecessors, (494), 358 states have call successors, (494) [2021-12-14 17:45:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 3275 transitions. [2021-12-14 17:45:53,201 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 3275 transitions. Word has length 137 [2021-12-14 17:45:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:53,202 INFO L470 AbstractCegarLoop]: Abstraction has 2308 states and 3275 transitions. [2021-12-14 17:45:53,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-14 17:45:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 3275 transitions. [2021-12-14 17:45:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-14 17:45:53,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:53,206 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 17:45:53,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:45:53,206 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash -567146100, now seen corresponding path program 1 times [2021-12-14 17:45:53,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:53,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817796226] [2021-12-14 17:45:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:53,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:45:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:45:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:45:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:45:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-14 17:45:53,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:53,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817796226] [2021-12-14 17:45:53,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817796226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:53,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:53,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 17:45:53,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287177295] [2021-12-14 17:45:53,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:53,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 17:45:53,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:53,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 17:45:53,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-14 17:45:53,603 INFO L87 Difference]: Start difference. First operand 2308 states and 3275 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:45:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:55,852 INFO L93 Difference]: Finished difference Result 5048 states and 7335 transitions. [2021-12-14 17:45:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 17:45:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-12-14 17:45:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:55,867 INFO L225 Difference]: With dead ends: 5048 [2021-12-14 17:45:55,867 INFO L226 Difference]: Without dead ends: 2765 [2021-12-14 17:45:55,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-12-14 17:45:55,883 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 209 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 3558 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:55,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 3558 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 17:45:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-12-14 17:45:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2316. [2021-12-14 17:45:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 1789 states have (on average 1.3515930687534936) internal successors, (2418), 1801 states have internal predecessors, (2418), 359 states have call successors, (359), 132 states have call predecessors, (359), 167 states have return successors, (494), 382 states have call predecessors, (494), 358 states have call successors, (494) [2021-12-14 17:45:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3271 transitions. [2021-12-14 17:45:55,996 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3271 transitions. Word has length 119 [2021-12-14 17:45:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:55,997 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3271 transitions. [2021-12-14 17:45:55,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 17:45:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3271 transitions. [2021-12-14 17:45:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-14 17:45:56,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:56,003 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:45:56,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:45:56,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2050394968, now seen corresponding path program 1 times [2021-12-14 17:45:56,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:56,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129848605] [2021-12-14 17:45:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:56,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 17:45:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 17:45:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 17:45:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 17:45:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 17:45:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:45:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 17:45:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:45:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-14 17:45:56,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129848605] [2021-12-14 17:45:56,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129848605] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:45:56,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957569978] [2021-12-14 17:45:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:56,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:45:56,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:56,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:45:56,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:45:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 17:45:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:45:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-14 17:45:57,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 17:45:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957569978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:57,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 17:45:57,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2021-12-14 17:45:57,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370324294] [2021-12-14 17:45:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:57,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:45:57,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:45:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:45:57,093 INFO L87 Difference]: Start difference. First operand 2316 states and 3271 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-14 17:45:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:57,175 INFO L93 Difference]: Finished difference Result 4617 states and 6527 transitions. [2021-12-14 17:45:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 17:45:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 143 [2021-12-14 17:45:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:57,191 INFO L225 Difference]: With dead ends: 4617 [2021-12-14 17:45:57,191 INFO L226 Difference]: Without dead ends: 2317 [2021-12-14 17:45:57,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 17:45:57,199 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 2 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1191 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 [2021-12-14 17:45:57,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1191 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 17:45:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-12-14 17:45:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2021-12-14 17:45:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1790 states have (on average 1.3513966480446928) internal successors, (2419), 1802 states have internal predecessors, (2419), 359 states have call successors, (359), 132 states have call predecessors, (359), 167 states have return successors, (494), 382 states have call predecessors, (494), 358 states have call successors, (494) [2021-12-14 17:45:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3272 transitions. [2021-12-14 17:45:57,312 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3272 transitions. Word has length 143 [2021-12-14 17:45:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3272 transitions. [2021-12-14 17:45:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-14 17:45:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3272 transitions. [2021-12-14 17:45:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-14 17:45:57,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:57,317 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 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] [2021-12-14 17:45:57,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 17:45:57,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:45:57,532 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1093003820, now seen corresponding path program 1 times [2021-12-14 17:45:57,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094799404] [2021-12-14 17:45:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:57,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:45:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 17:45:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 17:45:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:45:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:45:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:45:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:45:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 17:45:57,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:57,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094799404] [2021-12-14 17:45:57,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094799404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:45:57,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773316364] [2021-12-14 17:45:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:57,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:45:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:57,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:45:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:45:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:58,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 17:45:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:45:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-14 17:45:58,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:45:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-14 17:45:58,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773316364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:45:58,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:45:58,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-14 17:45:58,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232044227] [2021-12-14 17:45:58,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:45:58,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 17:45:58,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 17:45:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-14 17:45:58,915 INFO L87 Difference]: Start difference. First operand 2317 states and 3272 transitions. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 10 states have internal predecessors, (129), 2 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-14 17:46:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:01,224 INFO L93 Difference]: Finished difference Result 5261 states and 7592 transitions. [2021-12-14 17:46:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 17:46:01,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 10 states have internal predecessors, (129), 2 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 127 [2021-12-14 17:46:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:01,239 INFO L225 Difference]: With dead ends: 5261 [2021-12-14 17:46:01,240 INFO L226 Difference]: Without dead ends: 2958 [2021-12-14 17:46:01,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-12-14 17:46:01,249 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 327 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:01,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 2118 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 17:46:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-12-14 17:46:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2320. [2021-12-14 17:46:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1793 states have (on average 1.350808700501952) internal successors, (2422), 1805 states have internal predecessors, (2422), 359 states have call successors, (359), 132 states have call predecessors, (359), 167 states have return successors, (494), 382 states have call predecessors, (494), 358 states have call successors, (494) [2021-12-14 17:46:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3275 transitions. [2021-12-14 17:46:01,388 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3275 transitions. Word has length 127 [2021-12-14 17:46:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:01,388 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 3275 transitions. [2021-12-14 17:46:01,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 10 states have internal predecessors, (129), 2 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-12-14 17:46:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3275 transitions. [2021-12-14 17:46:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-14 17:46:01,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:01,393 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:46:01,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 17:46:01,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-14 17:46:01,607 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -660711512, now seen corresponding path program 1 times [2021-12-14 17:46:01,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:01,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726308567] [2021-12-14 17:46:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:01,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:46:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:46:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:46:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:46:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:46:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 17:46:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:02,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:02,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:46:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:02,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:46:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-14 17:46:02,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726308567] [2021-12-14 17:46:02,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726308567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:02,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:02,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 17:46:02,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399941360] [2021-12-14 17:46:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:02,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 17:46:02,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 17:46:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:46:02,404 INFO L87 Difference]: Start difference. First operand 2320 states and 3275 transitions. Second operand has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 12 states have internal predecessors, (92), 4 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-14 17:46:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:06,344 INFO L93 Difference]: Finished difference Result 5513 states and 8066 transitions. [2021-12-14 17:46:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 17:46:06,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 12 states have internal predecessors, (92), 4 states have call successors, (16), 6 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 151 [2021-12-14 17:46:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:06,362 INFO L225 Difference]: With dead ends: 5513 [2021-12-14 17:46:06,362 INFO L226 Difference]: Without dead ends: 3222 [2021-12-14 17:46:06,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-14 17:46:06,371 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 350 mSDsluCounter, 6277 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 6722 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:06,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 6722 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-14 17:46:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2021-12-14 17:46:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2372. [2021-12-14 17:46:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1833 states have (on average 1.343153300600109) internal successors, (2462), 1841 states have internal predecessors, (2462), 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) [2021-12-14 17:46:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3347 transitions. [2021-12-14 17:46:06,533 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3347 transitions. Word has length 151 [2021-12-14 17:46:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3347 transitions. [2021-12-14 17:46:06,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 12 states have internal predecessors, (92), 4 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-14 17:46:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3347 transitions. [2021-12-14 17:46:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-14 17:46:06,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:06,539 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:46:06,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 17:46:06,539 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 921632664, now seen corresponding path program 2 times [2021-12-14 17:46:06,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260453763] [2021-12-14 17:46:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:06,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:46:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:46:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:46:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:46:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:46:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:06,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:46:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:46:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-14 17:46:07,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:07,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260453763] [2021-12-14 17:46:07,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260453763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:07,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:07,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 17:46:07,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591918085] [2021-12-14 17:46:07,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:07,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 17:46:07,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 17:46:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:46:07,211 INFO L87 Difference]: Start difference. First operand 2372 states and 3347 transitions. Second operand has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 12 states have internal predecessors, (81), 4 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-14 17:46:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:10,060 INFO L93 Difference]: Finished difference Result 5493 states and 7958 transitions. [2021-12-14 17:46:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 17:46:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 12 states have internal predecessors, (81), 4 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 133 [2021-12-14 17:46:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:10,078 INFO L225 Difference]: With dead ends: 5493 [2021-12-14 17:46:10,078 INFO L226 Difference]: Without dead ends: 3150 [2021-12-14 17:46:10,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-12-14 17:46:10,086 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 284 mSDsluCounter, 5988 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 6445 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:10,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 6445 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-14 17:46:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-12-14 17:46:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2388. [2021-12-14 17:46:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 1849 states have (on average 1.3401838831800974) internal successors, (2478), 1849 states have internal predecessors, (2478), 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) [2021-12-14 17:46:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 3363 transitions. [2021-12-14 17:46:10,202 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 3363 transitions. Word has length 133 [2021-12-14 17:46:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:10,203 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 3363 transitions. [2021-12-14 17:46:10,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 12 states have internal predecessors, (81), 4 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-14 17:46:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 3363 transitions. [2021-12-14 17:46:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-14 17:46:10,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:10,209 INFO L514 BasicCegarLoop]: 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] [2021-12-14 17:46:10,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:46:10,210 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash -796082131, now seen corresponding path program 1 times [2021-12-14 17:46:10,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:10,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505760634] [2021-12-14 17:46:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:10,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 17:46:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 17:46:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 17:46:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-14 17:46:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:46:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-14 17:46:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:46:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 17:46:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 17:46:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:46:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 17:46:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:46:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-14 17:46:12,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505760634] [2021-12-14 17:46:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505760634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:46:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314450088] [2021-12-14 17:46:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:12,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:46:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:46:12,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:46:12,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 17:46:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-14 17:46:12,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:46:17,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5