./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.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 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 23:33:20,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 23:33:20,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 23:33:20,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 23:33:20,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 23:33:20,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 23:33:20,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 23:33:20,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 23:33:20,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 23:33:20,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 23:33:20,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 23:33:20,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 23:33:20,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 23:33:20,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 23:33:20,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 23:33:20,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 23:33:20,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 23:33:20,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 23:33:20,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 23:33:20,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 23:33:20,854 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 23:33:20,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 23:33:20,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 23:33:20,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 23:33:20,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 23:33:20,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 23:33:20,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 23:33:20,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 23:33:20,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 23:33:20,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 23:33:20,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 23:33:20,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 23:33:20,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 23:33:20,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 23:33:20,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 23:33:20,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 23:33:20,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 23:33:20,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 23:33:20,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 23:33:20,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 23:33:20,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 23:33:20,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 23:33:20,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 23:33:20,899 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 23:33:20,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 23:33:20,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 23:33:20,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 23:33:20,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 23:33:20,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 23:33:20,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 23:33:20,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 23:33:20,902 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 23:33:20,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 23:33:20,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 23:33:20,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 23:33:20,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 23:33:20,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 23:33:20,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 23:33:20,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 23:33:20,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 23:33:20,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 23:33:20,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 23:33:20,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 23:33:20,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 23:33:20,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 23:33:20,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 23:33:20,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 23:33:20,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 23:33:20,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 23:33:20,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 23:33:20,907 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 23:33:20,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 23:33:20,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 23:33:20,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-07-19 23:33:21,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 23:33:21,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 23:33:21,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 23:33:21,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 23:33:21,195 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 23:33:21,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-07-19 23:33:21,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/922454205/b784079fe40946448bc1a35695d6704f/FLAGa1dc9f615 [2022-07-19 23:33:21,963 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 23:33:21,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-07-19 23:33:22,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/922454205/b784079fe40946448bc1a35695d6704f/FLAGa1dc9f615 [2022-07-19 23:33:22,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/922454205/b784079fe40946448bc1a35695d6704f [2022-07-19 23:33:22,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 23:33:22,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 23:33:22,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 23:33:22,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 23:33:22,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 23:33:22,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:33:22" (1/1) ... [2022-07-19 23:33:22,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6a1d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:22, skipping insertion in model container [2022-07-19 23:33:22,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:33:22" (1/1) ... [2022-07-19 23:33:22,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 23:33:22,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 23:33:23,085 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-07-19 23:33:23,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 23:33:23,614 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 23:33:23,763 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-07-19 23:33:23,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 23:33:23,977 INFO L208 MainTranslator]: Completed translation [2022-07-19 23:33:23,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23 WrapperNode [2022-07-19 23:33:23,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 23:33:23,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 23:33:23,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 23:33:23,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 23:33:23,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,130 INFO L137 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2002 [2022-07-19 23:33:24,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 23:33:24,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 23:33:24,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 23:33:24,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 23:33:24,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 23:33:24,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 23:33:24,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 23:33:24,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 23:33:24,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (1/1) ... [2022-07-19 23:33:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 23:33:24,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:24,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 23:33:24,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 23:33:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-07-19 23:33:24,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-07-19 23:33:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 23:33:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-07-19 23:33:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 23:33:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 23:33:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-19 23:33:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-19 23:33:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 23:33:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-07-19 23:33:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-07-19 23:33:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-19 23:33:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-19 23:33:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-07-19 23:33:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-07-19 23:33:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-19 23:33:24,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-19 23:33:24,331 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-07-19 23:33:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-07-19 23:33:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-07-19 23:33:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-07-19 23:33:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-07-19 23:33:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-07-19 23:33:24,332 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-19 23:33:24,332 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-19 23:33:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-07-19 23:33:24,333 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-07-19 23:33:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 23:33:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-07-19 23:33:24,333 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-07-19 23:33:24,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-19 23:33:24,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-19 23:33:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-19 23:33:24,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-19 23:33:24,334 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-07-19 23:33:24,334 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-07-19 23:33:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 23:33:24,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 23:33:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-07-19 23:33:24,335 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-07-19 23:33:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 23:33:24,335 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-07-19 23:33:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-07-19 23:33:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-07-19 23:33:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-07-19 23:33:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 23:33:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-07-19 23:33:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-07-19 23:33:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-07-19 23:33:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-07-19 23:33:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-07-19 23:33:24,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-07-19 23:33:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-07-19 23:33:24,338 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-07-19 23:33:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-07-19 23:33:24,339 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-07-19 23:33:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 23:33:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 23:33:24,340 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-07-19 23:33:24,340 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-07-19 23:33:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-07-19 23:33:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-07-19 23:33:24,341 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-07-19 23:33:24,341 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-07-19 23:33:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 23:33:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-07-19 23:33:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-07-19 23:33:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-07-19 23:33:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-07-19 23:33:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-07-19 23:33:24,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-07-19 23:33:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 23:33:24,343 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-07-19 23:33:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-07-19 23:33:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 23:33:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-07-19 23:33:24,344 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-07-19 23:33:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-07-19 23:33:24,344 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-07-19 23:33:24,344 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-19 23:33:24,344 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-19 23:33:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-19 23:33:24,345 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-19 23:33:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-07-19 23:33:24,345 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-07-19 23:33:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-07-19 23:33:24,345 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-07-19 23:33:24,345 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-07-19 23:33:24,346 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-07-19 23:33:24,346 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-19 23:33:24,346 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-19 23:33:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 23:33:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-07-19 23:33:24,347 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-07-19 23:33:24,347 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-07-19 23:33:24,348 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-07-19 23:33:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 23:33:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-19 23:33:24,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-19 23:33:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 23:33:24,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 23:33:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-07-19 23:33:24,349 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-07-19 23:33:24,855 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 23:33:24,862 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 23:33:25,052 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-19 23:33:26,030 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 23:33:26,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 23:33:26,049 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 23:33:26,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:33:26 BoogieIcfgContainer [2022-07-19 23:33:26,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 23:33:26,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 23:33:26,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 23:33:26,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 23:33:26,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:33:22" (1/3) ... [2022-07-19 23:33:26,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b423813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:33:26, skipping insertion in model container [2022-07-19 23:33:26,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:33:23" (2/3) ... [2022-07-19 23:33:26,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b423813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:33:26, skipping insertion in model container [2022-07-19 23:33:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:33:26" (3/3) ... [2022-07-19 23:33:26,066 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-07-19 23:33:26,079 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 23:33:26,080 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 23:33:26,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 23:33:26,164 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3cdee312, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7633a663 [2022-07-19 23:33:26,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 23:33:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 726 states, 530 states have (on average 1.3716981132075472) internal successors, (727), 546 states have internal predecessors, (727), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-07-19 23:33:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 23:33:26,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:26,188 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:26,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash 135613019, now seen corresponding path program 1 times [2022-07-19 23:33:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532474032] [2022-07-19 23:33:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 23:33:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 23:33:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 23:33:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 23:33:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 23:33:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 23:33:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 23:33:26,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:26,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532474032] [2022-07-19 23:33:26,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532474032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:26,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:26,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 23:33:26,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340992751] [2022-07-19 23:33:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:26,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 23:33:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 23:33:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:26,805 INFO L87 Difference]: Start difference. First operand has 726 states, 530 states have (on average 1.3716981132075472) internal successors, (727), 546 states have internal predecessors, (727), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 23:33:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:28,987 INFO L93 Difference]: Finished difference Result 2353 states and 3522 transitions. [2022-07-19 23:33:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 23:33:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-07-19 23:33:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:29,016 INFO L225 Difference]: With dead ends: 2353 [2022-07-19 23:33:29,016 INFO L226 Difference]: Without dead ends: 1614 [2022-07-19 23:33:29,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 23:33:29,028 INFO L413 NwaCegarLoop]: 1093 mSDtfsCounter, 1883 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:29,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2020 Valid, 2346 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 23:33:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-07-19 23:33:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1368. [2022-07-19 23:33:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1006 states have (on average 1.3538767395626243) internal successors, (1362), 1024 states have internal predecessors, (1362), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-07-19 23:33:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1919 transitions. [2022-07-19 23:33:29,230 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1919 transitions. Word has length 53 [2022-07-19 23:33:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:29,231 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1919 transitions. [2022-07-19 23:33:29,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 23:33:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1919 transitions. [2022-07-19 23:33:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 23:33:29,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:29,236 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:29,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 23:33:29,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1669594221, now seen corresponding path program 1 times [2022-07-19 23:33:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610398382] [2022-07-19 23:33:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:29,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:29,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480383517] [2022-07-19 23:33:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:29,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:29,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:29,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:29,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 23:33:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 23:33:29,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 23:33:29,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610398382] [2022-07-19 23:33:29,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480383517] [2022-07-19 23:33:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480383517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:29,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:29,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 23:33:29,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677174683] [2022-07-19 23:33:29,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:29,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 23:33:29,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:29,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 23:33:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:29,696 INFO L87 Difference]: Start difference. First operand 1368 states and 1919 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 23:33:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:29,766 INFO L93 Difference]: Finished difference Result 2722 states and 3819 transitions. [2022-07-19 23:33:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 23:33:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-07-19 23:33:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:29,777 INFO L225 Difference]: With dead ends: 2722 [2022-07-19 23:33:29,778 INFO L226 Difference]: Without dead ends: 1368 [2022-07-19 23:33:29,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:29,786 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 971 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:29,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 992 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:33:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-07-19 23:33:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2022-07-19 23:33:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1006 states have (on average 1.3528827037773359) internal successors, (1361), 1024 states have internal predecessors, (1361), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-07-19 23:33:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1918 transitions. [2022-07-19 23:33:29,871 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1918 transitions. Word has length 55 [2022-07-19 23:33:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:29,871 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1918 transitions. [2022-07-19 23:33:29,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 23:33:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1918 transitions. [2022-07-19 23:33:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 23:33:29,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:29,876 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:29,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 23:33:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:30,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 658476971, now seen corresponding path program 1 times [2022-07-19 23:33:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:30,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201113917] [2022-07-19 23:33:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:30,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:30,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856101595] [2022-07-19 23:33:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:30,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:30,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:30,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 23:33:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 23:33:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 23:33:30,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:30,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201113917] [2022-07-19 23:33:30,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856101595] [2022-07-19 23:33:30,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856101595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:30,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:30,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 23:33:30,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179330087] [2022-07-19 23:33:30,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:30,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 23:33:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 23:33:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:30,571 INFO L87 Difference]: Start difference. First operand 1368 states and 1918 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 23:33:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:30,737 INFO L93 Difference]: Finished difference Result 4073 states and 5792 transitions. [2022-07-19 23:33:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 23:33:30,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-07-19 23:33:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:30,753 INFO L225 Difference]: With dead ends: 4073 [2022-07-19 23:33:30,753 INFO L226 Difference]: Without dead ends: 2695 [2022-07-19 23:33:30,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 23:33:30,768 INFO L413 NwaCegarLoop]: 1188 mSDtfsCounter, 975 mSDsluCounter, 3374 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 4562 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:30,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 4562 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:33:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-07-19 23:33:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2687. [2022-07-19 23:33:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 1975 states have (on average 1.3544303797468353) internal successors, (2675), 2011 states have internal predecessors, (2675), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2022-07-19 23:33:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3824 transitions. [2022-07-19 23:33:30,900 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3824 transitions. Word has length 55 [2022-07-19 23:33:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:30,900 INFO L495 AbstractCegarLoop]: Abstraction has 2687 states and 3824 transitions. [2022-07-19 23:33:30,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 23:33:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3824 transitions. [2022-07-19 23:33:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 23:33:30,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:30,907 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-19 23:33:30,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:31,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 23:33:31,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1631345663, now seen corresponding path program 1 times [2022-07-19 23:33:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:31,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7983056] [2022-07-19 23:33:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 23:33:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 23:33:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 23:33:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 23:33:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 23:33:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 23:33:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 23:33:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7983056] [2022-07-19 23:33:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7983056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:31,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:31,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 23:33:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075066340] [2022-07-19 23:33:31,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:31,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 23:33:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 23:33:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:31,275 INFO L87 Difference]: Start difference. First operand 2687 states and 3824 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 23:33:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:33,647 INFO L93 Difference]: Finished difference Result 8119 states and 11688 transitions. [2022-07-19 23:33:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 23:33:33,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 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 89 [2022-07-19 23:33:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:33,680 INFO L225 Difference]: With dead ends: 8119 [2022-07-19 23:33:33,680 INFO L226 Difference]: Without dead ends: 5446 [2022-07-19 23:33:33,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 23:33:33,692 INFO L413 NwaCegarLoop]: 1058 mSDtfsCounter, 1564 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:33,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 2510 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 23:33:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2022-07-19 23:33:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 4985. [2022-07-19 23:33:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 3692 states have (on average 1.3518418201516793) internal successors, (4991), 3761 states have internal predecessors, (4991), 948 states have call successors, (948), 313 states have call predecessors, (948), 344 states have return successors, (1110), 958 states have call predecessors, (1110), 947 states have call successors, (1110) [2022-07-19 23:33:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 7049 transitions. [2022-07-19 23:33:33,941 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 7049 transitions. Word has length 89 [2022-07-19 23:33:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:33,941 INFO L495 AbstractCegarLoop]: Abstraction has 4985 states and 7049 transitions. [2022-07-19 23:33:33,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 23:33:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 7049 transitions. [2022-07-19 23:33:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 23:33:33,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:33,947 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-07-19 23:33:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 23:33:33,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash 570705627, now seen corresponding path program 1 times [2022-07-19 23:33:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:33,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497731060] [2022-07-19 23:33:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 23:33:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 23:33:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 23:33:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 23:33:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 23:33:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 23:33:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 23:33:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 23:33:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 23:33:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497731060] [2022-07-19 23:33:34,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497731060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:34,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:34,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 23:33:34,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953466043] [2022-07-19 23:33:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 23:33:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 23:33:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:34,204 INFO L87 Difference]: Start difference. First operand 4985 states and 7049 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 23:33:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:36,573 INFO L93 Difference]: Finished difference Result 14213 states and 20186 transitions. [2022-07-19 23:33:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 23:33:36,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2022-07-19 23:33:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:36,629 INFO L225 Difference]: With dead ends: 14213 [2022-07-19 23:33:36,629 INFO L226 Difference]: Without dead ends: 9242 [2022-07-19 23:33:36,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 23:33:36,649 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 1490 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:36,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 2480 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 23:33:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-07-19 23:33:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 8517. [2022-07-19 23:33:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8517 states, 6326 states have (on average 1.346190325640215) internal successors, (8516), 6455 states have internal predecessors, (8516), 1552 states have call successors, (1552), 575 states have call predecessors, (1552), 638 states have return successors, (1841), 1562 states have call predecessors, (1841), 1551 states have call successors, (1841) [2022-07-19 23:33:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8517 states to 8517 states and 11909 transitions. [2022-07-19 23:33:37,120 INFO L78 Accepts]: Start accepts. Automaton has 8517 states and 11909 transitions. Word has length 104 [2022-07-19 23:33:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:37,121 INFO L495 AbstractCegarLoop]: Abstraction has 8517 states and 11909 transitions. [2022-07-19 23:33:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 23:33:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8517 states and 11909 transitions. [2022-07-19 23:33:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-19 23:33:37,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:37,135 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-07-19 23:33:37,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 23:33:37,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1464423004, now seen corresponding path program 1 times [2022-07-19 23:33:37,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:37,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250466378] [2022-07-19 23:33:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 23:33:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 23:33:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 23:33:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 23:33:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 23:33:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 23:33:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 23:33:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 23:33:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 23:33:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 23:33:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-19 23:33:37,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250466378] [2022-07-19 23:33:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250466378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:37,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:37,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 23:33:37,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386306267] [2022-07-19 23:33:37,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:37,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 23:33:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 23:33:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:37,356 INFO L87 Difference]: Start difference. First operand 8517 states and 11909 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 23:33:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:39,527 INFO L93 Difference]: Finished difference Result 22537 states and 31728 transitions. [2022-07-19 23:33:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 23:33:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-07-19 23:33:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:39,629 INFO L225 Difference]: With dead ends: 22537 [2022-07-19 23:33:39,629 INFO L226 Difference]: Without dead ends: 14034 [2022-07-19 23:33:39,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 23:33:39,666 INFO L413 NwaCegarLoop]: 1330 mSDtfsCounter, 1208 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:39,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 2585 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 23:33:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14034 states. [2022-07-19 23:33:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14034 to 12847. [2022-07-19 23:33:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12847 states, 9466 states have (on average 1.3322417071624761) internal successors, (12611), 9666 states have internal predecessors, (12611), 2330 states have call successors, (2330), 943 states have call predecessors, (2330), 1050 states have return successors, (2831), 2357 states have call predecessors, (2831), 2329 states have call successors, (2831) [2022-07-19 23:33:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12847 states to 12847 states and 17772 transitions. [2022-07-19 23:33:40,347 INFO L78 Accepts]: Start accepts. Automaton has 12847 states and 17772 transitions. Word has length 118 [2022-07-19 23:33:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:40,348 INFO L495 AbstractCegarLoop]: Abstraction has 12847 states and 17772 transitions. [2022-07-19 23:33:40,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 23:33:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12847 states and 17772 transitions. [2022-07-19 23:33:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-19 23:33:40,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:40,358 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1] [2022-07-19 23:33:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 23:33:40,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1872959109, now seen corresponding path program 1 times [2022-07-19 23:33:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898670953] [2022-07-19 23:33:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:40,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305737996] [2022-07-19 23:33:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:40,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:40,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 23:33:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:40,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 23:33:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 23:33:40,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898670953] [2022-07-19 23:33:40,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305737996] [2022-07-19 23:33:40,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305737996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:40,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:40,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 23:33:40,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661136896] [2022-07-19 23:33:40,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:40,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 23:33:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 23:33:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:40,879 INFO L87 Difference]: Start difference. First operand 12847 states and 17772 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 23:33:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:41,537 INFO L93 Difference]: Finished difference Result 33105 states and 45688 transitions. [2022-07-19 23:33:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 23:33:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2022-07-19 23:33:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:41,633 INFO L225 Difference]: With dead ends: 33105 [2022-07-19 23:33:41,634 INFO L226 Difference]: Without dead ends: 20283 [2022-07-19 23:33:41,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:41,683 INFO L413 NwaCegarLoop]: 1142 mSDtfsCounter, 941 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:41,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 2063 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 23:33:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2022-07-19 23:33:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 20270. [2022-07-19 23:33:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20270 states, 14946 states have (on average 1.3285828984343637) internal successors, (19857), 15275 states have internal predecessors, (19857), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2022-07-19 23:33:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20270 states to 20270 states and 27838 transitions. [2022-07-19 23:33:42,701 INFO L78 Accepts]: Start accepts. Automaton has 20270 states and 27838 transitions. Word has length 123 [2022-07-19 23:33:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:42,702 INFO L495 AbstractCegarLoop]: Abstraction has 20270 states and 27838 transitions. [2022-07-19 23:33:42,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 23:33:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20270 states and 27838 transitions. [2022-07-19 23:33:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-19 23:33:42,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:42,717 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1] [2022-07-19 23:33:42,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:42,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:42,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash 546342467, now seen corresponding path program 1 times [2022-07-19 23:33:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911836130] [2022-07-19 23:33:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:42,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:42,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561113194] [2022-07-19 23:33:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:42,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:42,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 23:33:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 23:33:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-19 23:33:43,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911836130] [2022-07-19 23:33:43,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561113194] [2022-07-19 23:33:43,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561113194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:43,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:43,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 23:33:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217655541] [2022-07-19 23:33:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 23:33:43,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 23:33:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:43,425 INFO L87 Difference]: Start difference. First operand 20270 states and 27838 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 23:33:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:44,027 INFO L93 Difference]: Finished difference Result 30962 states and 42975 transitions. [2022-07-19 23:33:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 23:33:44,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2022-07-19 23:33:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:44,101 INFO L225 Difference]: With dead ends: 30962 [2022-07-19 23:33:44,101 INFO L226 Difference]: Without dead ends: 20314 [2022-07-19 23:33:44,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:44,131 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 5 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:44,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1990 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:33:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2022-07-19 23:33:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 20314. [2022-07-19 23:33:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20314 states, 14990 states have (on average 1.32761841227485) internal successors, (19901), 15319 states have internal predecessors, (19901), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2022-07-19 23:33:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20314 states to 20314 states and 27882 transitions. [2022-07-19 23:33:44,987 INFO L78 Accepts]: Start accepts. Automaton has 20314 states and 27882 transitions. Word has length 123 [2022-07-19 23:33:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:44,989 INFO L495 AbstractCegarLoop]: Abstraction has 20314 states and 27882 transitions. [2022-07-19 23:33:44,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 23:33:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20314 states and 27882 transitions. [2022-07-19 23:33:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-19 23:33:45,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:45,002 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:45,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:45,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:45,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:45,216 INFO L85 PathProgramCache]: Analyzing trace with hash -756774844, now seen corresponding path program 1 times [2022-07-19 23:33:45,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:45,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761925785] [2022-07-19 23:33:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:45,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:45,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:45,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263367539] [2022-07-19 23:33:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:45,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:45,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:45,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:45,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 23:33:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 23:33:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 23:33:45,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:45,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761925785] [2022-07-19 23:33:45,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263367539] [2022-07-19 23:33:45,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263367539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:45,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:45,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 23:33:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050783325] [2022-07-19 23:33:45,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:45,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 23:33:45,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 23:33:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 23:33:45,651 INFO L87 Difference]: Start difference. First operand 20314 states and 27882 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 23:33:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:46,448 INFO L93 Difference]: Finished difference Result 40681 states and 55847 transitions. [2022-07-19 23:33:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 23:33:46,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 125 [2022-07-19 23:33:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:46,549 INFO L225 Difference]: With dead ends: 40681 [2022-07-19 23:33:46,549 INFO L226 Difference]: Without dead ends: 20356 [2022-07-19 23:33:46,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:46,618 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 12 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:46,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2994 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:33:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2022-07-19 23:33:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 20317. [2022-07-19 23:33:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20317 states, 14993 states have (on average 1.3267524844927634) internal successors, (19892), 15322 states have internal predecessors, (19892), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2022-07-19 23:33:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20317 states to 20317 states and 27873 transitions. [2022-07-19 23:33:47,537 INFO L78 Accepts]: Start accepts. Automaton has 20317 states and 27873 transitions. Word has length 125 [2022-07-19 23:33:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:47,537 INFO L495 AbstractCegarLoop]: Abstraction has 20317 states and 27873 transitions. [2022-07-19 23:33:47,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-19 23:33:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20317 states and 27873 transitions. [2022-07-19 23:33:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-19 23:33:47,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:47,550 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:47,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:47,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:47,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1089324516, now seen corresponding path program 1 times [2022-07-19 23:33:47,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:47,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458013207] [2022-07-19 23:33:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:47,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:47,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861637536] [2022-07-19 23:33:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:47,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:47,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:47,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 23:33:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 23:33:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 23:33:48,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:48,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458013207] [2022-07-19 23:33:48,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861637536] [2022-07-19 23:33:48,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861637536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:48,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:48,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 23:33:48,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010445138] [2022-07-19 23:33:48,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:48,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 23:33:48,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 23:33:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 23:33:48,495 INFO L87 Difference]: Start difference. First operand 20317 states and 27873 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 23:33:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:51,232 INFO L93 Difference]: Finished difference Result 42109 states and 58238 transitions. [2022-07-19 23:33:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 23:33:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 126 [2022-07-19 23:33:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:51,323 INFO L225 Difference]: With dead ends: 42109 [2022-07-19 23:33:51,323 INFO L226 Difference]: Without dead ends: 21817 [2022-07-19 23:33:51,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 23:33:51,373 INFO L413 NwaCegarLoop]: 1032 mSDtfsCounter, 1283 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:51,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2791 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 23:33:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2022-07-19 23:33:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 20019. [2022-07-19 23:33:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20019 states, 14731 states have (on average 1.3226529088317154) internal successors, (19484), 15038 states have internal predecessors, (19484), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-07-19 23:33:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 27137 transitions. [2022-07-19 23:33:52,384 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 27137 transitions. Word has length 126 [2022-07-19 23:33:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:52,385 INFO L495 AbstractCegarLoop]: Abstraction has 20019 states and 27137 transitions. [2022-07-19 23:33:52,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 23:33:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 27137 transitions. [2022-07-19 23:33:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 23:33:52,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:52,402 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:52,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:52,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:52,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash 537022152, now seen corresponding path program 1 times [2022-07-19 23:33:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:52,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746032589] [2022-07-19 23:33:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:52,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:52,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:52,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972857737] [2022-07-19 23:33:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:52,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:52,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:52,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 23:33:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 23:33:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:33:53,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:53,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746032589] [2022-07-19 23:33:53,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972857737] [2022-07-19 23:33:53,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972857737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:53,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:53,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 23:33:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16853463] [2022-07-19 23:33:53,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:53,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 23:33:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 23:33:53,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 23:33:53,165 INFO L87 Difference]: Start difference. First operand 20019 states and 27137 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 23:33:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:54,136 INFO L93 Difference]: Finished difference Result 20236 states and 27431 transitions. [2022-07-19 23:33:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 23:33:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 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 135 [2022-07-19 23:33:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:54,216 INFO L225 Difference]: With dead ends: 20236 [2022-07-19 23:33:54,216 INFO L226 Difference]: Without dead ends: 20187 [2022-07-19 23:33:54,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 23:33:54,228 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 941 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:54,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1685 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 23:33:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20187 states. [2022-07-19 23:33:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20187 to 20031. [2022-07-19 23:33:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20031 states, 14743 states have (on average 1.3223902869158244) internal successors, (19496), 15050 states have internal predecessors, (19496), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-07-19 23:33:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20031 states to 20031 states and 27149 transitions. [2022-07-19 23:33:55,088 INFO L78 Accepts]: Start accepts. Automaton has 20031 states and 27149 transitions. Word has length 135 [2022-07-19 23:33:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:55,088 INFO L495 AbstractCegarLoop]: Abstraction has 20031 states and 27149 transitions. [2022-07-19 23:33:55,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 23:33:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 20031 states and 27149 transitions. [2022-07-19 23:33:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 23:33:55,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:55,102 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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] [2022-07-19 23:33:55,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:55,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:55,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2120186719, now seen corresponding path program 1 times [2022-07-19 23:33:55,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:55,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497062463] [2022-07-19 23:33:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:55,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:55,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229861526] [2022-07-19 23:33:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:55,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:55,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:55,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 23:33:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 23:33:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-19 23:33:55,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:55,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497062463] [2022-07-19 23:33:55,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229861526] [2022-07-19 23:33:55,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229861526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:55,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:55,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 23:33:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98116272] [2022-07-19 23:33:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 23:33:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 23:33:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:55,846 INFO L87 Difference]: Start difference. First operand 20031 states and 27149 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 23:33:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:56,252 INFO L93 Difference]: Finished difference Result 30016 states and 40705 transitions. [2022-07-19 23:33:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 23:33:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 135 [2022-07-19 23:33:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:56,293 INFO L225 Difference]: With dead ends: 30016 [2022-07-19 23:33:56,293 INFO L226 Difference]: Without dead ends: 9721 [2022-07-19 23:33:56,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:33:56,344 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 898 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:56,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1118 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:33:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9721 states. [2022-07-19 23:33:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9721 to 9721. [2022-07-19 23:33:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 7136 states have (on average 1.3185257847533631) internal successors, (9409), 7292 states have internal predecessors, (9409), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-07-19 23:33:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 13152 transitions. [2022-07-19 23:33:56,769 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 13152 transitions. Word has length 135 [2022-07-19 23:33:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 9721 states and 13152 transitions. [2022-07-19 23:33:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-19 23:33:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 13152 transitions. [2022-07-19 23:33:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-19 23:33:56,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:56,780 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:56,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:56,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 23:33:56,995 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -472126265, now seen corresponding path program 1 times [2022-07-19 23:33:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:56,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791525893] [2022-07-19 23:33:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:56,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:57,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:57,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080418847] [2022-07-19 23:33:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:57,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:57,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:57,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:57,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 23:33:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:33:57,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 23:33:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:33:57,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 23:33:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:33:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791525893] [2022-07-19 23:33:57,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080418847] [2022-07-19 23:33:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080418847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 23:33:57,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 23:33:57,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-19 23:33:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162248318] [2022-07-19 23:33:57,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 23:33:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 23:33:57,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 23:33:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-19 23:33:57,757 INFO L87 Difference]: Start difference. First operand 9721 states and 13152 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-07-19 23:33:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:33:58,611 INFO L93 Difference]: Finished difference Result 10274 states and 13938 transitions. [2022-07-19 23:33:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 23:33:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 139 [2022-07-19 23:33:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:33:58,639 INFO L225 Difference]: With dead ends: 10274 [2022-07-19 23:33:58,639 INFO L226 Difference]: Without dead ends: 10225 [2022-07-19 23:33:58,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-19 23:33:58,645 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 1704 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 23:33:58,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1712 Valid, 1699 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 23:33:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10225 states. [2022-07-19 23:33:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10225 to 10225. [2022-07-19 23:33:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10225 states, 7514 states have (on average 1.3120841096619644) internal successors, (9859), 7688 states have internal predecessors, (9859), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 772 states have return successors, (2057), 1896 states have call predecessors, (2057), 1937 states have call successors, (2057) [2022-07-19 23:33:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10225 states to 10225 states and 13854 transitions. [2022-07-19 23:33:59,159 INFO L78 Accepts]: Start accepts. Automaton has 10225 states and 13854 transitions. Word has length 139 [2022-07-19 23:33:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:33:59,160 INFO L495 AbstractCegarLoop]: Abstraction has 10225 states and 13854 transitions. [2022-07-19 23:33:59,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-07-19 23:33:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10225 states and 13854 transitions. [2022-07-19 23:33:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-19 23:33:59,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:33:59,174 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:33:59,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 23:33:59,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 23:33:59,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:33:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:33:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash -23512636, now seen corresponding path program 2 times [2022-07-19 23:33:59,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:33:59,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701181632] [2022-07-19 23:33:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:33:59,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:33:59,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:33:59,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443739546] [2022-07-19 23:33:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 23:33:59,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:33:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:33:59,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:33:59,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 23:33:59,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 23:33:59,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 23:33:59,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 23:33:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:33:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-19 23:33:59,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:33:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:33:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701181632] [2022-07-19 23:33:59,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:33:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443739546] [2022-07-19 23:33:59,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443739546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:33:59,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:33:59,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 23:33:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466015325] [2022-07-19 23:33:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:33:59,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 23:33:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:33:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 23:33:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:33:59,800 INFO L87 Difference]: Start difference. First operand 10225 states and 13854 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 23:34:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:00,113 INFO L93 Difference]: Finished difference Result 20494 states and 28008 transitions. [2022-07-19 23:34:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 23:34:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2022-07-19 23:34:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:00,141 INFO L225 Difference]: With dead ends: 20494 [2022-07-19 23:34:00,141 INFO L226 Difference]: Without dead ends: 10347 [2022-07-19 23:34:00,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:34:00,166 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 2 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3965 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:00,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3965 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:34:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2022-07-19 23:34:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10305. [2022-07-19 23:34:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10305 states, 7574 states have (on average 1.3096118299445472) internal successors, (9919), 7748 states have internal predecessors, (9919), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 792 states have return successors, (2086), 1916 states have call predecessors, (2086), 1937 states have call successors, (2086) [2022-07-19 23:34:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10305 states to 10305 states and 13943 transitions. [2022-07-19 23:34:00,616 INFO L78 Accepts]: Start accepts. Automaton has 10305 states and 13943 transitions. Word has length 151 [2022-07-19 23:34:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:00,616 INFO L495 AbstractCegarLoop]: Abstraction has 10305 states and 13943 transitions. [2022-07-19 23:34:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-19 23:34:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10305 states and 13943 transitions. [2022-07-19 23:34:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-19 23:34:00,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:00,633 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:00,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 23:34:00,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1154172383, now seen corresponding path program 1 times [2022-07-19 23:34:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:00,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672177701] [2022-07-19 23:34:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:00,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615803827] [2022-07-19 23:34:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:00,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:00,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:00,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 23:34:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 23:34:01,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:34:01,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 23:34:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:34:01,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:01,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672177701] [2022-07-19 23:34:01,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:01,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615803827] [2022-07-19 23:34:01,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615803827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 23:34:01,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 23:34:01,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-19 23:34:01,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791897313] [2022-07-19 23:34:01,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 23:34:01,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 23:34:01,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 23:34:01,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-19 23:34:01,636 INFO L87 Difference]: Start difference. First operand 10305 states and 13943 transitions. Second operand has 14 states, 14 states have (on average 12.785714285714286) internal successors, (179), 14 states have internal predecessors, (179), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-07-19 23:34:02,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:02,571 INFO L93 Difference]: Finished difference Result 11362 states and 15467 transitions. [2022-07-19 23:34:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 23:34:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.785714285714286) internal successors, (179), 14 states have internal predecessors, (179), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 153 [2022-07-19 23:34:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:02,601 INFO L225 Difference]: With dead ends: 11362 [2022-07-19 23:34:02,601 INFO L226 Difference]: Without dead ends: 11313 [2022-07-19 23:34:02,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-19 23:34:02,607 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 1262 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:02,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 2482 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 23:34:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-07-19 23:34:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11313. [2022-07-19 23:34:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11313 states, 8330 states have (on average 1.2987995198079232) internal successors, (10819), 8540 states have internal predecessors, (10819), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 792 states have return successors, (2338), 2132 states have call predecessors, (2338), 2189 states have call successors, (2338) [2022-07-19 23:34:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 15347 transitions. [2022-07-19 23:34:02,966 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 15347 transitions. Word has length 153 [2022-07-19 23:34:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:02,966 INFO L495 AbstractCegarLoop]: Abstraction has 11313 states and 15347 transitions. [2022-07-19 23:34:02,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.785714285714286) internal successors, (179), 14 states have internal predecessors, (179), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-07-19 23:34:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 15347 transitions. [2022-07-19 23:34:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-19 23:34:02,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:02,990 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:03,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 23:34:03,203 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash -535217326, now seen corresponding path program 1 times [2022-07-19 23:34:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837496476] [2022-07-19 23:34:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:03,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:03,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554457184] [2022-07-19 23:34:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:03,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:03,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:03,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 23:34:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:03,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 23:34:03,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:34:03,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 23:34:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-19 23:34:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837496476] [2022-07-19 23:34:04,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554457184] [2022-07-19 23:34:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554457184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 23:34:04,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 23:34:04,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-19 23:34:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237824876] [2022-07-19 23:34:04,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 23:34:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 23:34:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 23:34:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-19 23:34:04,234 INFO L87 Difference]: Start difference. First operand 11313 states and 15347 transitions. Second operand has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-07-19 23:34:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:06,044 INFO L93 Difference]: Finished difference Result 13378 states and 18347 transitions. [2022-07-19 23:34:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 23:34:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 182 [2022-07-19 23:34:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:06,082 INFO L225 Difference]: With dead ends: 13378 [2022-07-19 23:34:06,082 INFO L226 Difference]: Without dead ends: 13329 [2022-07-19 23:34:06,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 23:34:06,091 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 2342 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2386 SdHoareTripleChecker+Valid, 4091 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:06,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2386 Valid, 4091 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 23:34:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2022-07-19 23:34:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13329. [2022-07-19 23:34:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13329 states, 9842 states have (on average 1.2821580979475717) internal successors, (12619), 10124 states have internal predecessors, (12619), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 792 states have return successors, (2842), 2564 states have call predecessors, (2842), 2693 states have call successors, (2842) [2022-07-19 23:34:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13329 states to 13329 states and 18155 transitions. [2022-07-19 23:34:06,658 INFO L78 Accepts]: Start accepts. Automaton has 13329 states and 18155 transitions. Word has length 182 [2022-07-19 23:34:06,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:06,658 INFO L495 AbstractCegarLoop]: Abstraction has 13329 states and 18155 transitions. [2022-07-19 23:34:06,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-07-19 23:34:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand 13329 states and 18155 transitions. [2022-07-19 23:34:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-19 23:34:06,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:06,687 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:06,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 23:34:06,914 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash -999549107, now seen corresponding path program 2 times [2022-07-19 23:34:06,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:06,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472214491] [2022-07-19 23:34:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:06,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:06,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549716342] [2022-07-19 23:34:06,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 23:34:06,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:06,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:06,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:06,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 23:34:07,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 23:34:07,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 23:34:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 23:34:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-07-19 23:34:07,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472214491] [2022-07-19 23:34:07,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549716342] [2022-07-19 23:34:07,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549716342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:07,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:07,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 23:34:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213779688] [2022-07-19 23:34:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:07,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 23:34:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 23:34:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-19 23:34:07,563 INFO L87 Difference]: Start difference. First operand 13329 states and 18155 transitions. Second operand has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-19 23:34:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:08,525 INFO L93 Difference]: Finished difference Result 26858 states and 36750 transitions. [2022-07-19 23:34:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 23:34:08,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 225 [2022-07-19 23:34:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:08,582 INFO L225 Difference]: With dead ends: 26858 [2022-07-19 23:34:08,582 INFO L226 Difference]: Without dead ends: 13607 [2022-07-19 23:34:08,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-19 23:34:08,621 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 20 mSDsluCounter, 13146 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14165 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:08,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 14165 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 23:34:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2022-07-19 23:34:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 13441. [2022-07-19 23:34:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13441 states, 9922 states have (on average 1.2770610763958878) internal successors, (12671), 10204 states have internal predecessors, (12671), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 824 states have return successors, (2898), 2596 states have call predecessors, (2898), 2693 states have call successors, (2898) [2022-07-19 23:34:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 18263 transitions. [2022-07-19 23:34:09,242 INFO L78 Accepts]: Start accepts. Automaton has 13441 states and 18263 transitions. Word has length 225 [2022-07-19 23:34:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:09,243 INFO L495 AbstractCegarLoop]: Abstraction has 13441 states and 18263 transitions. [2022-07-19 23:34:09,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-19 23:34:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 13441 states and 18263 transitions. [2022-07-19 23:34:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-19 23:34:09,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:09,275 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:09,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 23:34:09,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 23:34:09,477 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1281005638, now seen corresponding path program 2 times [2022-07-19 23:34:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:09,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493782035] [2022-07-19 23:34:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:09,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:09,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:09,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721842683] [2022-07-19 23:34:09,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 23:34:09,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:09,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:09,519 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:09,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 23:34:09,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 23:34:09,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 23:34:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 23:34:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-07-19 23:34:10,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:10,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493782035] [2022-07-19 23:34:10,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:10,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721842683] [2022-07-19 23:34:10,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721842683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:10,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:10,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 23:34:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615353660] [2022-07-19 23:34:10,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:10,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 23:34:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 23:34:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-19 23:34:10,106 INFO L87 Difference]: Start difference. First operand 13441 states and 18263 transitions. Second operand has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-19 23:34:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:10,832 INFO L93 Difference]: Finished difference Result 27002 states and 36750 transitions. [2022-07-19 23:34:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 23:34:10,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 230 [2022-07-19 23:34:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:10,872 INFO L225 Difference]: With dead ends: 27002 [2022-07-19 23:34:10,872 INFO L226 Difference]: Without dead ends: 13639 [2022-07-19 23:34:10,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-19 23:34:10,903 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 22 mSDsluCounter, 12120 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13138 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:10,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13138 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 23:34:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13639 states. [2022-07-19 23:34:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13639 to 13473. [2022-07-19 23:34:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13473 states, 9954 states have (on average 1.2753666867590918) internal successors, (12695), 10220 states have internal predecessors, (12695), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 824 states have return successors, (2898), 2612 states have call predecessors, (2898), 2693 states have call successors, (2898) [2022-07-19 23:34:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13473 states to 13473 states and 18287 transitions. [2022-07-19 23:34:11,378 INFO L78 Accepts]: Start accepts. Automaton has 13473 states and 18287 transitions. Word has length 230 [2022-07-19 23:34:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:11,379 INFO L495 AbstractCegarLoop]: Abstraction has 13473 states and 18287 transitions. [2022-07-19 23:34:11,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-19 23:34:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13473 states and 18287 transitions. [2022-07-19 23:34:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-19 23:34:11,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:11,415 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:11,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 23:34:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:11,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 898829726, now seen corresponding path program 1 times [2022-07-19 23:34:11,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:11,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668360222] [2022-07-19 23:34:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:11,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524111810] [2022-07-19 23:34:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:11,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:11,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:11,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:11,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 23:34:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 23:34:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2022-07-19 23:34:12,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668360222] [2022-07-19 23:34:12,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524111810] [2022-07-19 23:34:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524111810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:12,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 23:34:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055102916] [2022-07-19 23:34:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:12,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 23:34:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 23:34:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:34:12,094 INFO L87 Difference]: Start difference. First operand 13473 states and 18287 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-19 23:34:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:12,799 INFO L93 Difference]: Finished difference Result 33000 states and 44681 transitions. [2022-07-19 23:34:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 23:34:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 248 [2022-07-19 23:34:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:12,842 INFO L225 Difference]: With dead ends: 33000 [2022-07-19 23:34:12,842 INFO L226 Difference]: Without dead ends: 19605 [2022-07-19 23:34:12,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:34:12,863 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 828 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:12,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 2078 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:34:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19605 states. [2022-07-19 23:34:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19605 to 19592. [2022-07-19 23:34:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 14505 states have (on average 1.271699413995174) internal successors, (18446), 14885 states have internal predecessors, (18446), 3844 states have call successors, (3844), 1115 states have call predecessors, (3844), 1242 states have return successors, (4130), 3726 states have call predecessors, (4130), 3843 states have call successors, (4130) [2022-07-19 23:34:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 26420 transitions. [2022-07-19 23:34:13,509 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 26420 transitions. Word has length 248 [2022-07-19 23:34:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:13,510 INFO L495 AbstractCegarLoop]: Abstraction has 19592 states and 26420 transitions. [2022-07-19 23:34:13,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-19 23:34:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 26420 transitions. [2022-07-19 23:34:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-19 23:34:13,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:13,556 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:13,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:13,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:13,757 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1092480309, now seen corresponding path program 1 times [2022-07-19 23:34:13,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:13,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982772354] [2022-07-19 23:34:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:13,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132635985] [2022-07-19 23:34:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:13,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:13,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:13,800 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:13,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 23:34:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 23:34:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-19 23:34:14,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:14,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982772354] [2022-07-19 23:34:14,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:14,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132635985] [2022-07-19 23:34:14,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132635985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:14,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:14,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 23:34:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167963774] [2022-07-19 23:34:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 23:34:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 23:34:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 23:34:14,279 INFO L87 Difference]: Start difference. First operand 19592 states and 26420 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 23:34:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:15,385 INFO L93 Difference]: Finished difference Result 51112 states and 68818 transitions. [2022-07-19 23:34:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 23:34:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 261 [2022-07-19 23:34:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:15,486 INFO L225 Difference]: With dead ends: 51112 [2022-07-19 23:34:15,486 INFO L226 Difference]: Without dead ends: 31598 [2022-07-19 23:34:15,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:34:15,539 INFO L413 NwaCegarLoop]: 1728 mSDtfsCounter, 983 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 4225 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 4225 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 23:34:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31598 states. [2022-07-19 23:34:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31598 to 28788. [2022-07-19 23:34:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28788 states, 21253 states have (on average 1.2667388133439985) internal successors, (26922), 21809 states have internal predecessors, (26922), 5656 states have call successors, (5656), 1671 states have call predecessors, (5656), 1878 states have return successors, (6114), 5506 states have call predecessors, (6114), 5655 states have call successors, (6114) [2022-07-19 23:34:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28788 states to 28788 states and 38692 transitions. [2022-07-19 23:34:16,873 INFO L78 Accepts]: Start accepts. Automaton has 28788 states and 38692 transitions. Word has length 261 [2022-07-19 23:34:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:16,873 INFO L495 AbstractCegarLoop]: Abstraction has 28788 states and 38692 transitions. [2022-07-19 23:34:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 23:34:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28788 states and 38692 transitions. [2022-07-19 23:34:16,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 23:34:16,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:16,943 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:16,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:17,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:17,144 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:17,145 INFO L85 PathProgramCache]: Analyzing trace with hash 62685997, now seen corresponding path program 1 times [2022-07-19 23:34:17,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:17,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462758224] [2022-07-19 23:34:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:17,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:17,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:17,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559376202] [2022-07-19 23:34:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:17,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:17,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:17,182 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:17,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 23:34:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:17,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 23:34:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 68 proven. 12 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2022-07-19 23:34:17,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 23:34:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2022-07-19 23:34:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462758224] [2022-07-19 23:34:18,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:18,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559376202] [2022-07-19 23:34:18,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559376202] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 23:34:18,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 23:34:18,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2022-07-19 23:34:18,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600387667] [2022-07-19 23:34:18,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:18,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 23:34:18,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:18,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 23:34:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-19 23:34:18,365 INFO L87 Difference]: Start difference. First operand 28788 states and 38692 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-19 23:34:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:25,243 INFO L93 Difference]: Finished difference Result 104556 states and 147739 transitions. [2022-07-19 23:34:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 23:34:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 255 [2022-07-19 23:34:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:25,837 INFO L225 Difference]: With dead ends: 104556 [2022-07-19 23:34:25,837 INFO L226 Difference]: Without dead ends: 85419 [2022-07-19 23:34:25,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 495 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2022-07-19 23:34:25,914 INFO L413 NwaCegarLoop]: 1886 mSDtfsCounter, 4558 mSDsluCounter, 3880 mSDsCounter, 0 mSdLazyCounter, 3811 mSolverCounterSat, 1755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 5766 SdHoareTripleChecker+Invalid, 5566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1755 IncrementalHoareTripleChecker+Valid, 3811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:25,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4709 Valid, 5766 Invalid, 5566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1755 Valid, 3811 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 23:34:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85419 states. [2022-07-19 23:34:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85419 to 48089. [2022-07-19 23:34:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48089 states, 35412 states have (on average 1.2549700666440755) internal successors, (44441), 36448 states have internal predecessors, (44441), 9508 states have call successors, (9508), 2507 states have call predecessors, (9508), 3168 states have return successors, (11570), 9450 states have call predecessors, (11570), 9507 states have call successors, (11570) [2022-07-19 23:34:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48089 states to 48089 states and 65519 transitions. [2022-07-19 23:34:29,044 INFO L78 Accepts]: Start accepts. Automaton has 48089 states and 65519 transitions. Word has length 255 [2022-07-19 23:34:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:29,045 INFO L495 AbstractCegarLoop]: Abstraction has 48089 states and 65519 transitions. [2022-07-19 23:34:29,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-19 23:34:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 48089 states and 65519 transitions. [2022-07-19 23:34:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-19 23:34:29,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:29,212 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:29,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:29,428 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash 972017135, now seen corresponding path program 1 times [2022-07-19 23:34:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768981874] [2022-07-19 23:34:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:29,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:29,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533486853] [2022-07-19 23:34:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:29,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:29,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:29,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 23:34:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 23:34:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-19 23:34:29,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768981874] [2022-07-19 23:34:29,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533486853] [2022-07-19 23:34:29,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533486853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:29,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:29,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 23:34:29,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237248686] [2022-07-19 23:34:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:29,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 23:34:29,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 23:34:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:34:29,947 INFO L87 Difference]: Start difference. First operand 48089 states and 65519 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 23:34:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:32,467 INFO L93 Difference]: Finished difference Result 96130 states and 131000 transitions. [2022-07-19 23:34:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 23:34:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 263 [2022-07-19 23:34:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:32,715 INFO L225 Difference]: With dead ends: 96130 [2022-07-19 23:34:32,715 INFO L226 Difference]: Without dead ends: 48119 [2022-07-19 23:34:32,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 23:34:32,845 INFO L413 NwaCegarLoop]: 996 mSDtfsCounter, 0 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:32,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1987 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 23:34:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48119 states. [2022-07-19 23:34:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48119 to 48119. [2022-07-19 23:34:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48119 states, 35442 states have (on average 1.2547542463743582) internal successors, (44471), 36478 states have internal predecessors, (44471), 9508 states have call successors, (9508), 2507 states have call predecessors, (9508), 3168 states have return successors, (11570), 9450 states have call predecessors, (11570), 9507 states have call successors, (11570) [2022-07-19 23:34:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48119 states to 48119 states and 65549 transitions. [2022-07-19 23:34:35,574 INFO L78 Accepts]: Start accepts. Automaton has 48119 states and 65549 transitions. Word has length 263 [2022-07-19 23:34:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:35,574 INFO L495 AbstractCegarLoop]: Abstraction has 48119 states and 65549 transitions. [2022-07-19 23:34:35,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 23:34:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 48119 states and 65549 transitions. [2022-07-19 23:34:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-19 23:34:35,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:35,707 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:35,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:35,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:35,908 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -785610003, now seen corresponding path program 1 times [2022-07-19 23:34:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:35,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815033647] [2022-07-19 23:34:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:35,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:35,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079140711] [2022-07-19 23:34:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:35,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:35,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:35,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 23:34:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 23:34:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-19 23:34:36,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:36,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:36,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815033647] [2022-07-19 23:34:36,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079140711] [2022-07-19 23:34:36,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079140711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:36,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:36,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 23:34:36,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402678255] [2022-07-19 23:34:36,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:36,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 23:34:36,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 23:34:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 23:34:36,440 INFO L87 Difference]: Start difference. First operand 48119 states and 65549 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 23:34:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 23:34:39,891 INFO L93 Difference]: Finished difference Result 115958 states and 157846 transitions. [2022-07-19 23:34:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 23:34:39,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 263 [2022-07-19 23:34:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 23:34:40,101 INFO L225 Difference]: With dead ends: 115958 [2022-07-19 23:34:40,101 INFO L226 Difference]: Without dead ends: 67917 [2022-07-19 23:34:40,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 23:34:40,205 INFO L413 NwaCegarLoop]: 1492 mSDtfsCounter, 983 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 23:34:40,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 3861 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 23:34:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67917 states. [2022-07-19 23:34:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67917 to 48119. [2022-07-19 23:34:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48119 states, 35442 states have (on average 1.2547542463743582) internal successors, (44471), 36478 states have internal predecessors, (44471), 9508 states have call successors, (9508), 2507 states have call predecessors, (9508), 3168 states have return successors, (11570), 9450 states have call predecessors, (11570), 9507 states have call successors, (11570) [2022-07-19 23:34:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48119 states to 48119 states and 65549 transitions. [2022-07-19 23:34:43,643 INFO L78 Accepts]: Start accepts. Automaton has 48119 states and 65549 transitions. Word has length 263 [2022-07-19 23:34:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 23:34:43,643 INFO L495 AbstractCegarLoop]: Abstraction has 48119 states and 65549 transitions. [2022-07-19 23:34:43,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 23:34:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 48119 states and 65549 transitions. [2022-07-19 23:34:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-19 23:34:43,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 23:34:43,765 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 23:34:43,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 23:34:43,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:43,966 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 23:34:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 23:34:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1333961797, now seen corresponding path program 1 times [2022-07-19 23:34:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 23:34:43,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107214280] [2022-07-19 23:34:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 23:34:44,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 23:34:44,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775678823] [2022-07-19 23:34:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 23:34:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 23:34:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 23:34:44,004 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 23:34:44,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 23:34:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 23:34:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 23:34:44,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 23:34:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2022-07-19 23:34:44,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 23:34:44,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 23:34:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107214280] [2022-07-19 23:34:44,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 23:34:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775678823] [2022-07-19 23:34:44,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775678823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 23:34:44,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 23:34:44,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 23:34:44,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634144326] [2022-07-19 23:34:44,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 23:34:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 23:34:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 23:34:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 23:34:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 23:34:44,505 INFO L87 Difference]: Start difference. First operand 48119 states and 65549 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19)