./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ed18c341b13cb38f54b1bbde59f9cd5a73bcebd88430e5620ebca0060f7baed5 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:40:21,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:40:21,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:40:21,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:40:21,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:40:21,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:40:21,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:40:21,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:40:21,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:40:21,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:40:21,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:40:21,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:40:21,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:40:21,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:40:21,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:40:21,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:40:21,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:40:21,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:40:21,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:40:21,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:40:21,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:40:21,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:40:21,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:40:21,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:40:21,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:40:21,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:40:21,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:40:21,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:40:21,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:40:21,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:40:21,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:40:21,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:40:21,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:40:21,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:40:21,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:40:21,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:40:21,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:40:21,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:40:21,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:40:21,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:40:21,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:40:21,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 16:40:21,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:40:21,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:40:21,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:40:21,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:40:21,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:40:21,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:40:21,243 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:40:21,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:40:21,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 16:40:21,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:40:21,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:40:21,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:40:21,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:40:21,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:40:21,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:40:21,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:40:21,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:40:21,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:40:21,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:40:21,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:40:21,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:40:21,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:40:21,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:40:21,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed18c341b13cb38f54b1bbde59f9cd5a73bcebd88430e5620ebca0060f7baed5 [2021-11-05 16:40:21,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:40:21,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:40:21,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:40:21,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:40:21,497 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:40:21,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i [2021-11-05 16:40:21,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190efe4b4/e7ee156ba25d4d3cb413851a8dffe6d2/FLAG5a29e0cf3 [2021-11-05 16:40:22,250 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:40:22,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i [2021-11-05 16:40:22,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190efe4b4/e7ee156ba25d4d3cb413851a8dffe6d2/FLAG5a29e0cf3 [2021-11-05 16:40:22,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190efe4b4/e7ee156ba25d4d3cb413851a8dffe6d2 [2021-11-05 16:40:22,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:40:22,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:40:22,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:40:22,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:40:22,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:40:22,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:40:22" (1/1) ... [2021-11-05 16:40:22,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dafc03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:22, skipping insertion in model container [2021-11-05 16:40:22,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:40:22" (1/1) ... [2021-11-05 16:40:22,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:40:22,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:40:23,660 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i[198800,198813] [2021-11-05 16:40:24,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:40:24,207 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:40:24,325 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i[198800,198813] [2021-11-05 16:40:24,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:40:24,681 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:40:24,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24 WrapperNode [2021-11-05 16:40:24,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:40:24,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:40:24,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:40:24,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:40:24,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:24,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:25,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:40:25,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:40:25,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:40:25,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:40:25,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:25,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:40:26,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:40:26,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:40:26,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:40:26,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (1/1) ... [2021-11-05 16:40:26,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:40:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:40:26,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-05 16:40:26,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-05 16:40:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-05 16:40:26,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-05 16:40:26,952 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-05 16:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_xmit_process [2021-11-05 16:40:26,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_xmit_process [2021-11-05 16:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_destroy_interface [2021-11-05 16:40:26,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_destroy_interface [2021-11-05 16:40:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_push [2021-11-05 16:40:26,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_push [2021-11-05 16:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_release [2021-11-05 16:40:26,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_release [2021-11-05 16:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_send_frame [2021-11-05 16:40:26,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_send_frame [2021-11-05 16:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:40:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:40:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_channel_push [2021-11-05 16:40:26,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_channel_push [2021-11-05 16:40:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 16:40:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_disconnect_channel [2021-11-05 16:40:26,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_disconnect_channel [2021-11-05 16:40:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 16:40:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 16:40:26,955 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-11-05 16:40:26,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-11-05 16:40:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unregister_channel [2021-11-05 16:40:26,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unregister_channel [2021-11-05 16:40:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 16:40:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_ccp_closed [2021-11-05 16:40:26,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_ccp_closed [2021-11-05 16:40:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:40:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:40:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-05 16:40:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-05 16:40:26,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-05 16:40:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_mp_explode [2021-11-05 16:40:26,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_mp_explode [2021-11-05 16:40:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-05 16:40:26,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-05 16:40:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_ioctl [2021-11-05 16:40:26,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_ioctl [2021-11-05 16:40:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_ccp_peek [2021-11-05 16:40:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_ccp_peek [2021-11-05 16:40:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 16:40:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:40:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:40:43,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:40:43,911 INFO L299 CfgBuilder]: Removed 7944 assume(true) statements. [2021-11-05 16:40:43,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:40:43 BoogieIcfgContainer [2021-11-05 16:40:43,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:40:43,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:40:43,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:40:43,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:40:43,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:40:22" (1/3) ... [2021-11-05 16:40:43,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586908eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:40:43, skipping insertion in model container [2021-11-05 16:40:43,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:24" (2/3) ... [2021-11-05 16:40:43,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586908eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:40:43, skipping insertion in model container [2021-11-05 16:40:43,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:40:43" (3/3) ... [2021-11-05 16:40:43,929 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_generic.ko-entry_point.cil.out.i [2021-11-05 16:40:43,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:40:43,933 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:40:44,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:40:44,010 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-05 16:40:44,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:40:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 8551 states, 8460 states have (on average 1.5256501182033098) internal successors, (12907), 8486 states have internal predecessors, (12907), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 69 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-05 16:40:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-05 16:40:44,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:44,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:44,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:44,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1904356284, now seen corresponding path program 1 times [2021-11-05 16:40:44,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:44,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760976913] [2021-11-05 16:40:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:44,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:44,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:44,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760976913] [2021-11-05 16:40:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760976913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:44,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:44,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:40:44,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306402372] [2021-11-05 16:40:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:44,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:40:44,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:40:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:44,647 INFO L87 Difference]: Start difference. First operand has 8551 states, 8460 states have (on average 1.5256501182033098) internal successors, (12907), 8486 states have internal predecessors, (12907), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 69 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:48,489 INFO L93 Difference]: Finished difference Result 25571 states and 39270 transitions. [2021-11-05 16:40:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 16:40:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-05 16:40:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:48,578 INFO L225 Difference]: With dead ends: 25571 [2021-11-05 16:40:48,578 INFO L226 Difference]: Without dead ends: 16898 [2021-11-05 16:40:48,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.59ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:40:48,623 INFO L933 BasicCegarLoop]: 10976 mSDtfsCounter, 11613 mSDsluCounter, 32744 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2491.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11613 SdHoareTripleChecker+Valid, 43720 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 94.15ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3110.08ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:48,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11613 Valid, 43720 Invalid, 4271 Unknown, 0 Unchecked, 94.15ms Time], IncrementalHoareTripleChecker [52 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 3110.08ms Time] [2021-11-05 16:40:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16898 states. [2021-11-05 16:40:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16898 to 16186. [2021-11-05 16:40:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16186 states, 16007 states have (on average 1.3879552695695634) internal successors, (22217), 16057 states have internal predecessors, (22217), 146 states have call successors, (146), 32 states have call predecessors, (146), 32 states have return successors, (219), 138 states have call predecessors, (219), 146 states have call successors, (219) [2021-11-05 16:40:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16186 states to 16186 states and 22582 transitions. [2021-11-05 16:40:49,150 INFO L78 Accepts]: Start accepts. Automaton has 16186 states and 22582 transitions. Word has length 35 [2021-11-05 16:40:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:49,151 INFO L470 AbstractCegarLoop]: Abstraction has 16186 states and 22582 transitions. [2021-11-05 16:40:49,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16186 states and 22582 transitions. [2021-11-05 16:40:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-05 16:40:49,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:49,161 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:49,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 16:40:49,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1149088240, now seen corresponding path program 1 times [2021-11-05 16:40:49,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:49,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817689769] [2021-11-05 16:40:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:49,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:49,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:49,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817689769] [2021-11-05 16:40:49,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817689769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:49,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:49,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:49,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543903561] [2021-11-05 16:40:49,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:49,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:49,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:49,349 INFO L87 Difference]: Start difference. First operand 16186 states and 22582 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:50,037 INFO L93 Difference]: Finished difference Result 45840 states and 64262 transitions. [2021-11-05 16:40:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-05 16:40:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:50,153 INFO L225 Difference]: With dead ends: 45840 [2021-11-05 16:40:50,153 INFO L226 Difference]: Without dead ends: 29729 [2021-11-05 16:40:50,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.97ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:50,194 INFO L933 BasicCegarLoop]: 18212 mSDtfsCounter, 10006 mSDsluCounter, 11650 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10006 SdHoareTripleChecker+Valid, 29862 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.13ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.99ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:50,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10006 Valid, 29862 Invalid, 50 Unknown, 0 Unchecked, 23.13ms Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 79.99ms Time] [2021-11-05 16:40:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29729 states. [2021-11-05 16:40:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29729 to 28212. [2021-11-05 16:40:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28212 states, 27863 states have (on average 1.3924559451602483) internal successors, (38798), 27959 states have internal predecessors, (38798), 284 states have call successors, (284), 64 states have call predecessors, (284), 64 states have return successors, (614), 266 states have call predecessors, (614), 284 states have call successors, (614) [2021-11-05 16:40:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28212 states to 28212 states and 39696 transitions. [2021-11-05 16:40:50,951 INFO L78 Accepts]: Start accepts. Automaton has 28212 states and 39696 transitions. Word has length 55 [2021-11-05 16:40:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:50,951 INFO L470 AbstractCegarLoop]: Abstraction has 28212 states and 39696 transitions. [2021-11-05 16:40:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28212 states and 39696 transitions. [2021-11-05 16:40:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-05 16:40:50,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:50,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:50,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 16:40:50,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1727795715, now seen corresponding path program 1 times [2021-11-05 16:40:50,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:50,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225781021] [2021-11-05 16:40:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:50,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:51,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:51,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225781021] [2021-11-05 16:40:51,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225781021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:51,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:51,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:51,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256082710] [2021-11-05 16:40:51,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:51,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:51,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:51,066 INFO L87 Difference]: Start difference. First operand 28212 states and 39696 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:52,127 INFO L93 Difference]: Finished difference Result 79690 states and 111922 transitions. [2021-11-05 16:40:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:52,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-05 16:40:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:52,394 INFO L225 Difference]: With dead ends: 79690 [2021-11-05 16:40:52,395 INFO L226 Difference]: Without dead ends: 51553 [2021-11-05 16:40:52,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.63ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:52,463 INFO L933 BasicCegarLoop]: 20916 mSDtfsCounter, 9910 mSDsluCounter, 11656 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9910 SdHoareTripleChecker+Valid, 32572 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.19ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.45ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:52,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9910 Valid, 32572 Invalid, 34 Unknown, 0 Unchecked, 22.19ms Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 193.45ms Time] [2021-11-05 16:40:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51553 states. [2021-11-05 16:40:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51553 to 51534. [2021-11-05 16:40:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51534 states, 50897 states have (on average 1.3883136530640312) internal successors, (70661), 51069 states have internal predecessors, (70661), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-05 16:40:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 72285 transitions. [2021-11-05 16:40:53,675 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 72285 transitions. Word has length 58 [2021-11-05 16:40:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:53,676 INFO L470 AbstractCegarLoop]: Abstraction has 51534 states and 72285 transitions. [2021-11-05 16:40:53,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 72285 transitions. [2021-11-05 16:40:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-05 16:40:53,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:53,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:53,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 16:40:53,682 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1478756629, now seen corresponding path program 1 times [2021-11-05 16:40:53,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:53,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732958775] [2021-11-05 16:40:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:53,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:40:53,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:53,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732958775] [2021-11-05 16:40:53,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732958775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:53,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:53,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:53,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824822604] [2021-11-05 16:40:53,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:53,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:53,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:53,843 INFO L87 Difference]: Start difference. First operand 51534 states and 72285 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:55,244 INFO L93 Difference]: Finished difference Result 102998 states and 144491 transitions. [2021-11-05 16:40:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:55,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-05 16:40:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:55,453 INFO L225 Difference]: With dead ends: 102998 [2021-11-05 16:40:55,454 INFO L226 Difference]: Without dead ends: 51539 [2021-11-05 16:40:55,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.65ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:55,552 INFO L933 BasicCegarLoop]: 11777 mSDtfsCounter, 11770 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11770 SdHoareTripleChecker+Valid, 11781 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.25ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.60ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:55,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11770 Valid, 11781 Invalid, 4 Unknown, 0 Unchecked, 14.25ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 35.60ms Time] [2021-11-05 16:40:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51539 states. [2021-11-05 16:40:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51539 to 51534. [2021-11-05 16:40:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51534 states, 50897 states have (on average 1.3881564728765938) internal successors, (70653), 51069 states have internal predecessors, (70653), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-05 16:40:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 72277 transitions. [2021-11-05 16:40:56,850 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 72277 transitions. Word has length 81 [2021-11-05 16:40:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:56,850 INFO L470 AbstractCegarLoop]: Abstraction has 51534 states and 72277 transitions. [2021-11-05 16:40:56,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 72277 transitions. [2021-11-05 16:40:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-05 16:40:56,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:56,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:56,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 16:40:56,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash -835888805, now seen corresponding path program 1 times [2021-11-05 16:40:56,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:56,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768005719] [2021-11-05 16:40:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:56,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:40:57,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:57,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768005719] [2021-11-05 16:40:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768005719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:57,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:57,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:40:57,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049623333] [2021-11-05 16:40:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:40:57,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:40:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:40:57,024 INFO L87 Difference]: Start difference. First operand 51534 states and 72277 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:41:00,494 INFO L93 Difference]: Finished difference Result 205115 states and 288349 transitions. [2021-11-05 16:41:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:41:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-05 16:41:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:41:01,255 INFO L225 Difference]: With dead ends: 205115 [2021-11-05 16:41:01,255 INFO L226 Difference]: Without dead ends: 153656 [2021-11-05 16:41:01,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.46ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:41:01,417 INFO L933 BasicCegarLoop]: 18523 mSDtfsCounter, 23684 mSDsluCounter, 29473 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 612.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23766 SdHoareTripleChecker+Valid, 47996 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 71.04ms SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 737.40ms IncrementalHoareTripleChecker+Time [2021-11-05 16:41:01,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23766 Valid, 47996 Invalid, 828 Unknown, 0 Unchecked, 71.04ms Time], IncrementalHoareTripleChecker [275 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 737.40ms Time] [2021-11-05 16:41:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153656 states. [2021-11-05 16:41:03,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153656 to 52110. [2021-11-05 16:41:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52110 states, 51473 states have (on average 1.3838128727682475) internal successors, (71229), 51645 states have internal predecessors, (71229), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-05 16:41:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52110 states to 52110 states and 72853 transitions. [2021-11-05 16:41:03,699 INFO L78 Accepts]: Start accepts. Automaton has 52110 states and 72853 transitions. Word has length 83 [2021-11-05 16:41:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:41:03,701 INFO L470 AbstractCegarLoop]: Abstraction has 52110 states and 72853 transitions. [2021-11-05 16:41:03,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 52110 states and 72853 transitions. [2021-11-05 16:41:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-05 16:41:03,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:41:03,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:41:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 16:41:03,711 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:41:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:41:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash -379160658, now seen corresponding path program 1 times [2021-11-05 16:41:03,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:41:03,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489761174] [2021-11-05 16:41:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:41:03,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:41:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:41:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:41:04,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:41:04,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489761174] [2021-11-05 16:41:04,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489761174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:41:04,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:41:04,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 16:41:04,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13500023] [2021-11-05 16:41:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:41:04,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 16:41:04,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:41:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 16:41:04,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:41:04,123 INFO L87 Difference]: Start difference. First operand 52110 states and 72853 transitions. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:41:18,019 INFO L93 Difference]: Finished difference Result 407297 states and 571981 transitions. [2021-11-05 16:41:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-05 16:41:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-05 16:41:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:41:19,472 INFO L225 Difference]: With dead ends: 407297 [2021-11-05 16:41:19,472 INFO L226 Difference]: Without dead ends: 355262 [2021-11-05 16:41:19,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 285.32ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-11-05 16:41:19,654 INFO L933 BasicCegarLoop]: 44963 mSDtfsCounter, 111422 mSDsluCounter, 204464 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 1935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3679.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111461 SdHoareTripleChecker+Valid, 249427 SdHoareTripleChecker+Invalid, 7473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 241.88ms SdHoareTripleChecker+Time, 1935 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4516.77ms IncrementalHoareTripleChecker+Time [2021-11-05 16:41:19,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111461 Valid, 249427 Invalid, 7473 Unknown, 0 Unchecked, 241.88ms Time], IncrementalHoareTripleChecker [1935 Valid, 5538 Invalid, 0 Unknown, 0 Unchecked, 4516.77ms Time] [2021-11-05 16:41:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355262 states. [2021-11-05 16:41:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355262 to 52126. [2021-11-05 16:41:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52126 states, 51489 states have (on average 1.383693604459205) internal successors, (71245), 51661 states have internal predecessors, (71245), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-05 16:41:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52126 states to 52126 states and 72869 transitions. [2021-11-05 16:41:23,926 INFO L78 Accepts]: Start accepts. Automaton has 52126 states and 72869 transitions. Word has length 90 [2021-11-05 16:41:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:41:23,927 INFO L470 AbstractCegarLoop]: Abstraction has 52126 states and 72869 transitions. [2021-11-05 16:41:23,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 52126 states and 72869 transitions. [2021-11-05 16:41:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-05 16:41:23,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:41:23,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:41:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 16:41:23,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:41:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:41:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 326572585, now seen corresponding path program 1 times [2021-11-05 16:41:23,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:41:23,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867782298] [2021-11-05 16:41:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:41:23,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:41:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:41:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:41:24,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:41:24,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867782298] [2021-11-05 16:41:24,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867782298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:41:24,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435372763] [2021-11-05 16:41:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:41:24,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:41:24,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:41:24,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:41:24,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 16:41:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:41:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:41:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:41:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:41:25,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:41:25,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435372763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:41:25,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:41:25,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-05 16:41:25,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137265496] [2021-11-05 16:41:25,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:41:25,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:41:25,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:41:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:41:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:41:25,302 INFO L87 Difference]: Start difference. First operand 52126 states and 72869 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:27,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:41:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:41:29,257 INFO L93 Difference]: Finished difference Result 104123 states and 145660 transitions. [2021-11-05 16:41:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:41:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-05 16:41:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:41:29,378 INFO L225 Difference]: With dead ends: 104123 [2021-11-05 16:41:29,378 INFO L226 Difference]: Without dead ends: 51893 [2021-11-05 16:41:29,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.70ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:41:29,453 INFO L933 BasicCegarLoop]: 12019 mSDtfsCounter, 11597 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2036.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11597 SdHoareTripleChecker+Valid, 12398 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2170.49ms IncrementalHoareTripleChecker+Time [2021-11-05 16:41:29,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11597 Valid, 12398 Invalid, 13 Unknown, 0 Unchecked, 12.15ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2170.49ms Time] [2021-11-05 16:41:29,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51893 states. [2021-11-05 16:41:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51893 to 51893. [2021-11-05 16:41:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51893 states, 51256 states have (on average 1.384442796940846) internal successors, (70961), 51428 states have internal predecessors, (70961), 516 states have call successors, (516), 120 states have call predecessors, (516), 120 states have return successors, (1108), 488 states have call predecessors, (1108), 516 states have call successors, (1108) [2021-11-05 16:41:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51893 states to 51893 states and 72585 transitions. [2021-11-05 16:41:31,281 INFO L78 Accepts]: Start accepts. Automaton has 51893 states and 72585 transitions. Word has length 92 [2021-11-05 16:41:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:41:31,281 INFO L470 AbstractCegarLoop]: Abstraction has 51893 states and 72585 transitions. [2021-11-05 16:41:31,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 51893 states and 72585 transitions. [2021-11-05 16:41:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-05 16:41:31,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:41:31,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:41:31,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-05 16:41:31,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:41:31,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:41:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:41:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash 339258647, now seen corresponding path program 1 times [2021-11-05 16:41:31,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:41:31,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554297675] [2021-11-05 16:41:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:41:31,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:41:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:41:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:41:32,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:41:32,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554297675] [2021-11-05 16:41:32,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554297675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:41:32,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513676337] [2021-11-05 16:41:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:41:32,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:41:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:41:32,341 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) [2021-11-05 16:41:32,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 16:41:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:41:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-05 16:41:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:41:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:41:33,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:41:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513676337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:41:33,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:41:33,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-11-05 16:41:33,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198565245] [2021-11-05 16:41:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:41:33,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:41:33,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:41:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:41:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-05 16:41:33,647 INFO L87 Difference]: Start difference. First operand 51893 states and 72585 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:41:35,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:41:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:41:37,629 INFO L93 Difference]: Finished difference Result 103511 states and 144792 transitions. [2021-11-05 16:41:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:41:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-05 16:41:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:41:37,741 INFO L225 Difference]: With dead ends: 103511 [2021-11-05 16:41:37,742 INFO L226 Difference]: Without dead ends: 51891 [2021-11-05 16:41:37,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 181.61ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-05 16:41:37,802 INFO L933 BasicCegarLoop]: 11765 mSDtfsCounter, 3 mSDsluCounter, 35284 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2040.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47049 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2181.05ms IncrementalHoareTripleChecker+Time [2021-11-05 16:41:37,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 47049 Invalid, 15 Unknown, 0 Unchecked, 22.89ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2181.05ms Time] [2021-11-05 16:41:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51891 states.