./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 35987657 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-?-3598765 [2022-07-21 11:04:40,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 11:04:40,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 11:04:40,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 11:04:40,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 11:04:40,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 11:04:40,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 11:04:40,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 11:04:40,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 11:04:40,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 11:04:40,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 11:04:40,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 11:04:40,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 11:04:40,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 11:04:40,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 11:04:40,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 11:04:40,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 11:04:40,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 11:04:40,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 11:04:40,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 11:04:40,500 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 11:04:40,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 11:04:40,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 11:04:40,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 11:04:40,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 11:04:40,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 11:04:40,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 11:04:40,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 11:04:40,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 11:04:40,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 11:04:40,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 11:04:40,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 11:04:40,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 11:04:40,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 11:04:40,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 11:04:40,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 11:04:40,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 11:04:40,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 11:04:40,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 11:04:40,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 11:04:40,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 11:04:40,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 11:04:40,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 11:04:40,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 11:04:40,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 11:04:40,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 11:04:40,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 11:04:40,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 11:04:40,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 11:04:40,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 11:04:40,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 11:04:40,577 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 11:04:40,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 11:04:40,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 11:04:40,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 11:04:40,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 11:04:40,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 11:04:40,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 11:04:40,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 11:04:40,579 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 11:04:40,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 11:04:40,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 11:04:40,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 11:04:40,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 11:04:40,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 11:04:40,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 11:04:40,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 11:04:40,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 11:04:40,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 11:04:40,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 11:04:40,581 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 11:04:40,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 11:04:40,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 11:04:40,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-07-21 11:04:40,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 11:04:40,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 11:04:40,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 11:04:40,979 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 11:04:40,985 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 11:04:40,987 INFO L432 ainManager$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 [2022-07-21 11:04:41,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f77bf1e1/8bd18455414e41c0839db44cc8b85797/FLAG860ba4d29 [2022-07-21 11:04:41,814 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 11:04:41,814 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 [2022-07-21 11:04:41,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f77bf1e1/8bd18455414e41c0839db44cc8b85797/FLAG860ba4d29 [2022-07-21 11:04:41,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f77bf1e1/8bd18455414e41c0839db44cc8b85797 [2022-07-21 11:04:41,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 11:04:41,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 11:04:41,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 11:04:41,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 11:04:41,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 11:04:41,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:04:41" (1/1) ... [2022-07-21 11:04:41,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77946042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:41, skipping insertion in model container [2022-07-21 11:04:41,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:04:41" (1/1) ... [2022-07-21 11:04:41,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 11:04:42,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 11:04:42,797 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] [2022-07-21 11:04:43,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 11:04:43,349 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 11:04:43,477 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] [2022-07-21 11:04:43,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 11:04:43,703 INFO L208 MainTranslator]: Completed translation [2022-07-21 11:04:43,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43 WrapperNode [2022-07-21 11:04:43,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 11:04:43,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 11:04:43,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 11:04:43,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 11:04:43,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:43,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:43,910 INFO L137 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2002 [2022-07-21 11:04:43,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 11:04:43,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 11:04:43,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 11:04:43,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 11:04:43,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:43,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:43,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:43,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:44,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:44,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:44,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:44,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 11:04:44,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 11:04:44,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 11:04:44,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 11:04:44,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (1/1) ... [2022-07-21 11:04:44,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 11:04:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:04:44,144 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) [2022-07-21 11:04:44,158 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 [2022-07-21 11:04:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-07-21 11:04:44,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-07-21 11:04:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-21 11:04:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-07-21 11:04:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-21 11:04:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-21 11:04:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-21 11:04:44,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-21 11:04:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 11:04:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-07-21 11:04:44,191 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-07-21 11:04:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-21 11:04:44,192 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-21 11:04:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-07-21 11:04:44,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-07-21 11:04:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 11:04:44,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 11:04:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-07-21 11:04:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-07-21 11:04:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-07-21 11:04:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-07-21 11:04:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-07-21 11:04:44,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-07-21 11:04:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-21 11:04:44,194 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-21 11:04:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-07-21 11:04:44,194 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-07-21 11:04:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 11:04:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-07-21 11:04:44,194 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-07-21 11:04:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-21 11:04:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-21 11:04:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-21 11:04:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-21 11:04:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-07-21 11:04:44,195 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-07-21 11:04:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 11:04:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 11:04:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-07-21 11:04:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-07-21 11:04:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 11:04:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-07-21 11:04:44,197 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-07-21 11:04:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-07-21 11:04:44,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-07-21 11:04:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 11:04:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-07-21 11:04:44,198 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-07-21 11:04:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-07-21 11:04:44,198 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-07-21 11:04:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-07-21 11:04:44,199 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-07-21 11:04:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-07-21 11:04:44,199 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-07-21 11:04:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-07-21 11:04:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-07-21 11:04:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 11:04:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 11:04:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-07-21 11:04:44,201 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-07-21 11:04:44,201 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-07-21 11:04:44,202 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-07-21 11:04:44,202 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-07-21 11:04:44,202 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-07-21 11:04:44,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 11:04:44,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-07-21 11:04:44,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-07-21 11:04:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-07-21 11:04:44,203 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-07-21 11:04:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-07-21 11:04:44,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-07-21 11:04:44,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 11:04:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-07-21 11:04:44,204 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-07-21 11:04:44,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 11:04:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-07-21 11:04:44,205 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-07-21 11:04:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-07-21 11:04:44,205 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-07-21 11:04:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-21 11:04:44,205 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-21 11:04:44,205 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-21 11:04:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-21 11:04:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-07-21 11:04:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-07-21 11:04:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-07-21 11:04:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-07-21 11:04:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-07-21 11:04:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-07-21 11:04:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-21 11:04:44,207 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-21 11:04:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 11:04:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-07-21 11:04:44,208 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-07-21 11:04:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-07-21 11:04:44,209 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-07-21 11:04:44,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-21 11:04:44,209 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-21 11:04:44,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-21 11:04:44,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 11:04:44,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 11:04:44,210 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-07-21 11:04:44,210 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-07-21 11:04:44,723 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 11:04:44,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 11:04:44,946 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-21 11:04:46,063 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 11:04:46,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 11:04:46,081 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 11:04:46,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:04:46 BoogieIcfgContainer [2022-07-21 11:04:46,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 11:04:46,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 11:04:46,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 11:04:46,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 11:04:46,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:04:41" (1/3) ... [2022-07-21 11:04:46,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e033fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:04:46, skipping insertion in model container [2022-07-21 11:04:46,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:04:43" (2/3) ... [2022-07-21 11:04:46,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e033fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:04:46, skipping insertion in model container [2022-07-21 11:04:46,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:04:46" (3/3) ... [2022-07-21 11:04:46,095 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 [2022-07-21 11:04:46,108 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 11:04:46,108 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 11:04:46,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 11:04:46,180 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@70126fe8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f1e936a [2022-07-21 11:04:46,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 11:04:46,188 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) [2022-07-21 11:04:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 11:04:46,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:04:46,204 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] [2022-07-21 11:04:46,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:04:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:04:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash 135613019, now seen corresponding path program 1 times [2022-07-21 11:04:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:04:46,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708054554] [2022-07-21 11:04:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:04:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 11:04:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 11:04:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 11:04:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 11:04:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 11:04:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 11:04:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 11:04:46,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:04:46,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708054554] [2022-07-21 11:04:46,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708054554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:04:46,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:04:46,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 11:04:46,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561093272] [2022-07-21 11:04:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:04:46,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 11:04:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:04:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 11:04:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:04:46,734 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) [2022-07-21 11:04:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:04:48,785 INFO L93 Difference]: Finished difference Result 2353 states and 3522 transitions. [2022-07-21 11:04:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 11:04:48,788 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 [2022-07-21 11:04:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:04:48,826 INFO L225 Difference]: With dead ends: 2353 [2022-07-21 11:04:48,827 INFO L226 Difference]: Without dead ends: 1614 [2022-07-21 11:04:48,839 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 [2022-07-21 11:04:48,842 INFO L413 NwaCegarLoop]: 1142 mSDtfsCounter, 1849 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 2396 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 11:04:48,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1984 Valid, 2396 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 11:04:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-07-21 11:04:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1368. [2022-07-21 11:04:49,062 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) [2022-07-21 11:04:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1919 transitions. [2022-07-21 11:04:49,076 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1919 transitions. Word has length 53 [2022-07-21 11:04:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:04:49,077 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1919 transitions. [2022-07-21 11:04:49,078 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) [2022-07-21 11:04:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1919 transitions. [2022-07-21 11:04:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 11:04:49,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:04:49,086 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] [2022-07-21 11:04:49,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 11:04:49,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:04:49,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:04:49,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1669594221, now seen corresponding path program 1 times [2022-07-21 11:04:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:04:49,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126395260] [2022-07-21 11:04:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:49,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:04:49,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:04:49,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086344872] [2022-07-21 11:04:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:49,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:04:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:04:49,164 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) [2022-07-21 11:04:49,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 11:04:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 11:04:49,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:04:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 11:04:49,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:04:49,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:04:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126395260] [2022-07-21 11:04:49,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:04:49,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086344872] [2022-07-21 11:04:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086344872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:04:49,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:04:49,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 11:04:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526501074] [2022-07-21 11:04:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:04:49,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 11:04:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:04:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 11:04:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:04:49,626 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) [2022-07-21 11:04:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:04:49,709 INFO L93 Difference]: Finished difference Result 2722 states and 3819 transitions. [2022-07-21 11:04:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 11:04:49,709 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 [2022-07-21 11:04:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:04:49,719 INFO L225 Difference]: With dead ends: 2722 [2022-07-21 11:04:49,719 INFO L226 Difference]: Without dead ends: 1368 [2022-07-21 11:04:49,725 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 [2022-07-21 11:04:49,726 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 [2022-07-21 11:04:49,727 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] [2022-07-21 11:04:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-07-21 11:04:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2022-07-21 11:04:49,812 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) [2022-07-21 11:04:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1918 transitions. [2022-07-21 11:04:49,820 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1918 transitions. Word has length 55 [2022-07-21 11:04:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:04:49,821 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1918 transitions. [2022-07-21 11:04:49,821 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) [2022-07-21 11:04:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1918 transitions. [2022-07-21 11:04:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 11:04:49,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:04:49,824 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] [2022-07-21 11:04:49,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 11:04:50,039 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 [2022-07-21 11:04:50,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:04:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:04:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash 658476971, now seen corresponding path program 1 times [2022-07-21 11:04:50,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:04:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951980966] [2022-07-21 11:04:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:50,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:04:50,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:04:50,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44474426] [2022-07-21 11:04:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:04:50,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:04:50,095 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) [2022-07-21 11:04:50,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 11:04:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 11:04:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:04:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 11:04:50,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:04:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:04:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951980966] [2022-07-21 11:04:50,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:04:50,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44474426] [2022-07-21 11:04:50,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44474426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:04:50,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:04:50,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 11:04:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193776101] [2022-07-21 11:04:50,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:04:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 11:04:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:04:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 11:04:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:04:50,514 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) [2022-07-21 11:04:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:04:50,691 INFO L93 Difference]: Finished difference Result 4073 states and 5792 transitions. [2022-07-21 11:04:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 11:04:50,692 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 [2022-07-21 11:04:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:04:50,708 INFO L225 Difference]: With dead ends: 4073 [2022-07-21 11:04:50,709 INFO L226 Difference]: Without dead ends: 2695 [2022-07-21 11:04:50,715 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 [2022-07-21 11:04:50,734 INFO L413 NwaCegarLoop]: 1204 mSDtfsCounter, 975 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 4610 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 [2022-07-21 11:04:50,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 4610 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 11:04:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-07-21 11:04:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2687. [2022-07-21 11:04:50,902 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) [2022-07-21 11:04:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3824 transitions. [2022-07-21 11:04:50,922 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3824 transitions. Word has length 55 [2022-07-21 11:04:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:04:50,924 INFO L495 AbstractCegarLoop]: Abstraction has 2687 states and 3824 transitions. [2022-07-21 11:04:50,924 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) [2022-07-21 11:04:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3824 transitions. [2022-07-21 11:04:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 11:04:50,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:04:50,932 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] [2022-07-21 11:04:50,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 11:04:51,155 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 [2022-07-21 11:04:51,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:04:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:04:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1631345663, now seen corresponding path program 1 times [2022-07-21 11:04:51,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:04:51,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995988163] [2022-07-21 11:04:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:04:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 11:04:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 11:04:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 11:04:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 11:04:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 11:04:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 11:04:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 11:04:51,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:04:51,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995988163] [2022-07-21 11:04:51,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995988163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:04:51,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:04:51,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 11:04:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171279516] [2022-07-21 11:04:51,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:04:51,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 11:04:51,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:04:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 11:04:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:04:51,355 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) [2022-07-21 11:04:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:04:53,711 INFO L93 Difference]: Finished difference Result 8119 states and 11688 transitions. [2022-07-21 11:04:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 11:04:53,712 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 [2022-07-21 11:04:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:04:53,746 INFO L225 Difference]: With dead ends: 8119 [2022-07-21 11:04:53,746 INFO L226 Difference]: Without dead ends: 5446 [2022-07-21 11:04:53,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 11:04:53,760 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 1563 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-21 11:04:53,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2498 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-21 11:04:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2022-07-21 11:04:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 4985. [2022-07-21 11:04:54,006 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) [2022-07-21 11:04:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 7049 transitions. [2022-07-21 11:04:54,028 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 7049 transitions. Word has length 89 [2022-07-21 11:04:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:04:54,029 INFO L495 AbstractCegarLoop]: Abstraction has 4985 states and 7049 transitions. [2022-07-21 11:04:54,029 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) [2022-07-21 11:04:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 7049 transitions. [2022-07-21 11:04:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 11:04:54,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:04:54,037 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] [2022-07-21 11:04:54,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 11:04:54,037 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:04:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:04:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1258426200, now seen corresponding path program 1 times [2022-07-21 11:04:54,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:04:54,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573587804] [2022-07-21 11:04:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:54,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:04:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 11:04:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 11:04:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 11:04:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 11:04:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 11:04:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 11:04:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 11:04:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 11:04:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 11:04:54,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:04:54,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573587804] [2022-07-21 11:04:54,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573587804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:04:54,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:04:54,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 11:04:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440318203] [2022-07-21 11:04:54,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:04:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 11:04:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:04:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 11:04:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:04:54,280 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) [2022-07-21 11:04:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:04:56,737 INFO L93 Difference]: Finished difference Result 14213 states and 20186 transitions. [2022-07-21 11:04:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 11:04:56,738 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 [2022-07-21 11:04:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:04:56,787 INFO L225 Difference]: With dead ends: 14213 [2022-07-21 11:04:56,787 INFO L226 Difference]: Without dead ends: 9242 [2022-07-21 11:04:56,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 11:04:56,804 INFO L413 NwaCegarLoop]: 1059 mSDtfsCounter, 1490 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-21 11:04:56,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 2473 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-21 11:04:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-07-21 11:04:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 8517. [2022-07-21 11:04:57,157 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) [2022-07-21 11:04:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8517 states to 8517 states and 11909 transitions. [2022-07-21 11:04:57,195 INFO L78 Accepts]: Start accepts. Automaton has 8517 states and 11909 transitions. Word has length 104 [2022-07-21 11:04:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:04:57,197 INFO L495 AbstractCegarLoop]: Abstraction has 8517 states and 11909 transitions. [2022-07-21 11:04:57,198 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) [2022-07-21 11:04:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8517 states and 11909 transitions. [2022-07-21 11:04:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 11:04:57,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:04:57,208 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] [2022-07-21 11:04:57,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 11:04:57,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:04:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:04:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1464423004, now seen corresponding path program 1 times [2022-07-21 11:04:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:04:57,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835972148] [2022-07-21 11:04:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:04:57,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:04:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 11:04:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 11:04:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 11:04:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 11:04:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 11:04:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-21 11:04:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 11:04:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 11:04:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 11:04:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 11:04:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:04:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-21 11:04:57,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:04:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835972148] [2022-07-21 11:04:57,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835972148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:04:57,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:04:57,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 11:04:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213045053] [2022-07-21 11:04:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:04:57,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 11:04:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:04:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 11:04:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:04:57,513 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) [2022-07-21 11:04:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:04:59,499 INFO L93 Difference]: Finished difference Result 22537 states and 31728 transitions. [2022-07-21 11:04:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 11:04:59,501 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 [2022-07-21 11:04:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:04:59,592 INFO L225 Difference]: With dead ends: 22537 [2022-07-21 11:04:59,593 INFO L226 Difference]: Without dead ends: 14034 [2022-07-21 11:04:59,625 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 [2022-07-21 11:04:59,627 INFO L413 NwaCegarLoop]: 1331 mSDtfsCounter, 1208 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 11:04:59,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 2586 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 11:04:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14034 states. [2022-07-21 11:05:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14034 to 12847. [2022-07-21 11:05:00,238 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) [2022-07-21 11:05:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12847 states to 12847 states and 17772 transitions. [2022-07-21 11:05:00,294 INFO L78 Accepts]: Start accepts. Automaton has 12847 states and 17772 transitions. Word has length 118 [2022-07-21 11:05:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:00,295 INFO L495 AbstractCegarLoop]: Abstraction has 12847 states and 17772 transitions. [2022-07-21 11:05:00,295 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) [2022-07-21 11:05:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 12847 states and 17772 transitions. [2022-07-21 11:05:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-21 11:05:00,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:00,304 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] [2022-07-21 11:05:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 11:05:00,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1872959109, now seen corresponding path program 1 times [2022-07-21 11:05:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:00,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232590172] [2022-07-21 11:05:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:00,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:00,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436776891] [2022-07-21 11:05:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:00,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:00,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:00,359 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) [2022-07-21 11:05:00,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 11:05:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 11:05:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 11:05:00,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:00,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232590172] [2022-07-21 11:05:00,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:00,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436776891] [2022-07-21 11:05:00,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436776891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:00,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:00,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 11:05:00,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706649359] [2022-07-21 11:05:00,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 11:05:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 11:05:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:05:00,823 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) [2022-07-21 11:05:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:01,469 INFO L93 Difference]: Finished difference Result 33105 states and 45688 transitions. [2022-07-21 11:05:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 11:05:01,471 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 [2022-07-21 11:05:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:01,549 INFO L225 Difference]: With dead ends: 33105 [2022-07-21 11:05:01,549 INFO L226 Difference]: Without dead ends: 20283 [2022-07-21 11:05:01,588 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 [2022-07-21 11:05:01,589 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 [2022-07-21 11:05:01,589 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] [2022-07-21 11:05:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2022-07-21 11:05:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 20270. [2022-07-21 11:05:02,374 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) [2022-07-21 11:05:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20270 states to 20270 states and 27838 transitions. [2022-07-21 11:05:02,443 INFO L78 Accepts]: Start accepts. Automaton has 20270 states and 27838 transitions. Word has length 123 [2022-07-21 11:05:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:02,444 INFO L495 AbstractCegarLoop]: Abstraction has 20270 states and 27838 transitions. [2022-07-21 11:05:02,444 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) [2022-07-21 11:05:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20270 states and 27838 transitions. [2022-07-21 11:05:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-21 11:05:02,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:02,456 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] [2022-07-21 11:05:02,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:02,679 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 [2022-07-21 11:05:02,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash 546342467, now seen corresponding path program 1 times [2022-07-21 11:05:02,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:02,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47068695] [2022-07-21 11:05:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:02,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317954626] [2022-07-21 11:05:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:02,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:02,713 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) [2022-07-21 11:05:02,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 11:05:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 11:05:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 11:05:03,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:03,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:03,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47068695] [2022-07-21 11:05:03,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:03,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317954626] [2022-07-21 11:05:03,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317954626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:03,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:03,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 11:05:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568536896] [2022-07-21 11:05:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:03,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 11:05:03,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 11:05:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:05:03,059 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) [2022-07-21 11:05:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:03,578 INFO L93 Difference]: Finished difference Result 30962 states and 42975 transitions. [2022-07-21 11:05:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 11:05:03,579 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 [2022-07-21 11:05:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:03,670 INFO L225 Difference]: With dead ends: 30962 [2022-07-21 11:05:03,671 INFO L226 Difference]: Without dead ends: 20314 [2022-07-21 11:05:03,708 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 [2022-07-21 11:05:03,709 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 [2022-07-21 11:05:03,709 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] [2022-07-21 11:05:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2022-07-21 11:05:04,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 20314. [2022-07-21 11:05:04,402 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) [2022-07-21 11:05:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20314 states to 20314 states and 27882 transitions. [2022-07-21 11:05:04,472 INFO L78 Accepts]: Start accepts. Automaton has 20314 states and 27882 transitions. Word has length 123 [2022-07-21 11:05:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:04,473 INFO L495 AbstractCegarLoop]: Abstraction has 20314 states and 27882 transitions. [2022-07-21 11:05:04,473 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) [2022-07-21 11:05:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 20314 states and 27882 transitions. [2022-07-21 11:05:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-21 11:05:04,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:04,489 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] [2022-07-21 11:05:04,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:04,703 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 [2022-07-21 11:05:04,703 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -756774844, now seen corresponding path program 1 times [2022-07-21 11:05:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:04,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534632348] [2022-07-21 11:05:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:04,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:04,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755373621] [2022-07-21 11:05:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:04,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:04,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:04,756 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) [2022-07-21 11:05:04,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 11:05:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 11:05:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 11:05:05,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534632348] [2022-07-21 11:05:05,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755373621] [2022-07-21 11:05:05,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755373621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:05,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:05,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 11:05:05,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403090511] [2022-07-21 11:05:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:05,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 11:05:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:05,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 11:05:05,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 11:05:05,145 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) [2022-07-21 11:05:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:05,856 INFO L93 Difference]: Finished difference Result 40681 states and 55847 transitions. [2022-07-21 11:05:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 11:05:05,858 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 [2022-07-21 11:05:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:05,954 INFO L225 Difference]: With dead ends: 40681 [2022-07-21 11:05:05,955 INFO L226 Difference]: Without dead ends: 20356 [2022-07-21 11:05:06,008 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 [2022-07-21 11:05:06,009 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 [2022-07-21 11:05:06,009 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] [2022-07-21 11:05:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2022-07-21 11:05:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 20317. [2022-07-21 11:05:06,777 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) [2022-07-21 11:05:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20317 states to 20317 states and 27873 transitions. [2022-07-21 11:05:06,857 INFO L78 Accepts]: Start accepts. Automaton has 20317 states and 27873 transitions. Word has length 125 [2022-07-21 11:05:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:06,858 INFO L495 AbstractCegarLoop]: Abstraction has 20317 states and 27873 transitions. [2022-07-21 11:05:06,858 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) [2022-07-21 11:05:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 20317 states and 27873 transitions. [2022-07-21 11:05:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 11:05:06,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:06,870 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] [2022-07-21 11:05:06,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:07,083 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 [2022-07-21 11:05:07,084 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:07,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1089324516, now seen corresponding path program 1 times [2022-07-21 11:05:07,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:07,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132534048] [2022-07-21 11:05:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:07,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:07,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119354071] [2022-07-21 11:05:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:07,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:07,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:07,117 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) [2022-07-21 11:05:07,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 11:05:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 11:05:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 11:05:07,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:07,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:07,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132534048] [2022-07-21 11:05:07,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:07,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119354071] [2022-07-21 11:05:07,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119354071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:07,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:07,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 11:05:07,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279069352] [2022-07-21 11:05:07,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:07,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 11:05:07,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 11:05:07,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 11:05:07,631 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) [2022-07-21 11:05:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:10,212 INFO L93 Difference]: Finished difference Result 42109 states and 58238 transitions. [2022-07-21 11:05:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 11:05:10,213 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 [2022-07-21 11:05:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:10,432 INFO L225 Difference]: With dead ends: 42109 [2022-07-21 11:05:10,432 INFO L226 Difference]: Without dead ends: 21817 [2022-07-21 11:05:10,477 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 [2022-07-21 11:05:10,478 INFO L413 NwaCegarLoop]: 1031 mSDtfsCounter, 1283 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 11:05:10,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2789 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-21 11:05:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2022-07-21 11:05:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 20019. [2022-07-21 11:05:11,142 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) [2022-07-21 11:05:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 27137 transitions. [2022-07-21 11:05:11,217 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 27137 transitions. Word has length 126 [2022-07-21 11:05:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:11,218 INFO L495 AbstractCegarLoop]: Abstraction has 20019 states and 27137 transitions. [2022-07-21 11:05:11,218 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) [2022-07-21 11:05:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 27137 transitions. [2022-07-21 11:05:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-21 11:05:11,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:11,231 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] [2022-07-21 11:05:11,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:11,447 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 [2022-07-21 11:05:11,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash 537022152, now seen corresponding path program 1 times [2022-07-21 11:05:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:11,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365348508] [2022-07-21 11:05:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:11,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:11,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:11,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298552628] [2022-07-21 11:05:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:11,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:11,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:11,606 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) [2022-07-21 11:05:11,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 11:05:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 11:05:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:12,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:12,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365348508] [2022-07-21 11:05:12,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:12,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298552628] [2022-07-21 11:05:12,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298552628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:12,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:12,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 11:05:12,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215829892] [2022-07-21 11:05:12,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 11:05:12,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 11:05:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 11:05:12,117 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) [2022-07-21 11:05:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:12,833 INFO L93 Difference]: Finished difference Result 20236 states and 27431 transitions. [2022-07-21 11:05:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 11:05:12,833 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 [2022-07-21 11:05:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:12,899 INFO L225 Difference]: With dead ends: 20236 [2022-07-21 11:05:12,900 INFO L226 Difference]: Without dead ends: 20187 [2022-07-21 11:05:12,916 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 [2022-07-21 11:05:12,917 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 [2022-07-21 11:05:12,917 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] [2022-07-21 11:05:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20187 states. [2022-07-21 11:05:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20187 to 20031. [2022-07-21 11:05:13,660 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) [2022-07-21 11:05:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20031 states to 20031 states and 27149 transitions. [2022-07-21 11:05:13,710 INFO L78 Accepts]: Start accepts. Automaton has 20031 states and 27149 transitions. Word has length 135 [2022-07-21 11:05:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:13,711 INFO L495 AbstractCegarLoop]: Abstraction has 20031 states and 27149 transitions. [2022-07-21 11:05:13,711 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) [2022-07-21 11:05:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 20031 states and 27149 transitions. [2022-07-21 11:05:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-21 11:05:13,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:13,724 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, 1, 1] [2022-07-21 11:05:13,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:13,951 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 [2022-07-21 11:05:13,952 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash -134402856, now seen corresponding path program 1 times [2022-07-21 11:05:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:13,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052510964] [2022-07-21 11:05:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:13,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70681247] [2022-07-21 11:05:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:13,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:13,991 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) [2022-07-21 11:05:13,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 11:05:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:14,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 11:05:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-21 11:05:14,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:14,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:14,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052510964] [2022-07-21 11:05:14,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:14,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70681247] [2022-07-21 11:05:14,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70681247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:14,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:14,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 11:05:14,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922860568] [2022-07-21 11:05:14,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:14,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 11:05:14,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 11:05:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:05:14,426 INFO L87 Difference]: Start difference. First operand 20031 states and 27149 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-07-21 11:05:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:14,879 INFO L93 Difference]: Finished difference Result 30016 states and 40705 transitions. [2022-07-21 11:05:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 11:05:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 137 [2022-07-21 11:05:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:14,906 INFO L225 Difference]: With dead ends: 30016 [2022-07-21 11:05:14,906 INFO L226 Difference]: Without dead ends: 9721 [2022-07-21 11:05:14,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:05:14,944 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 896 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 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 [2022-07-21 11:05:14,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 1118 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 11:05:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9721 states. [2022-07-21 11:05:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9721 to 9721. [2022-07-21 11:05:15,381 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) [2022-07-21 11:05:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 13152 transitions. [2022-07-21 11:05:15,411 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 13152 transitions. Word has length 137 [2022-07-21 11:05:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:15,412 INFO L495 AbstractCegarLoop]: Abstraction has 9721 states and 13152 transitions. [2022-07-21 11:05:15,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-07-21 11:05:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 13152 transitions. [2022-07-21 11:05:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-21 11:05:15,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:15,419 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] [2022-07-21 11:05:15,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:15,632 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 [2022-07-21 11:05:15,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -472126265, now seen corresponding path program 1 times [2022-07-21 11:05:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049142693] [2022-07-21 11:05:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:15,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:15,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744024937] [2022-07-21 11:05:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:15,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:15,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:15,696 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) [2022-07-21 11:05:15,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 11:05:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 11:05:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:16,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 11:05:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:16,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049142693] [2022-07-21 11:05:16,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744024937] [2022-07-21 11:05:16,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744024937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 11:05:16,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 11:05:16,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-21 11:05:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298173091] [2022-07-21 11:05:16,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 11:05:16,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 11:05:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 11:05:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-21 11:05:16,422 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) [2022-07-21 11:05:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:17,247 INFO L93 Difference]: Finished difference Result 10274 states and 13938 transitions. [2022-07-21 11:05:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 11:05:17,247 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 [2022-07-21 11:05:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:17,274 INFO L225 Difference]: With dead ends: 10274 [2022-07-21 11:05:17,274 INFO L226 Difference]: Without dead ends: 10225 [2022-07-21 11:05:17,280 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 [2022-07-21 11:05:17,281 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 1043 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 11:05:17,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 2379 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 11:05:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10225 states. [2022-07-21 11:05:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10225 to 10225. [2022-07-21 11:05:17,740 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) [2022-07-21 11:05:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10225 states to 10225 states and 13854 transitions. [2022-07-21 11:05:17,769 INFO L78 Accepts]: Start accepts. Automaton has 10225 states and 13854 transitions. Word has length 139 [2022-07-21 11:05:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:17,769 INFO L495 AbstractCegarLoop]: Abstraction has 10225 states and 13854 transitions. [2022-07-21 11:05:17,770 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) [2022-07-21 11:05:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 10225 states and 13854 transitions. [2022-07-21 11:05:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-21 11:05:17,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:17,782 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] [2022-07-21 11:05:17,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:18,007 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 [2022-07-21 11:05:18,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -23512636, now seen corresponding path program 2 times [2022-07-21 11:05:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735790460] [2022-07-21 11:05:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:18,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:18,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763213042] [2022-07-21 11:05:18,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 11:05:18,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:18,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:18,057 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) [2022-07-21 11:05:18,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 11:05:18,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 11:05:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 11:05:18,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 11:05:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-21 11:05:18,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:18,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:18,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735790460] [2022-07-21 11:05:18,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:18,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763213042] [2022-07-21 11:05:18,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763213042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:18,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:18,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 11:05:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491349952] [2022-07-21 11:05:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:18,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 11:05:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 11:05:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:05:18,407 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) [2022-07-21 11:05:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:18,780 INFO L93 Difference]: Finished difference Result 20494 states and 28008 transitions. [2022-07-21 11:05:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 11:05:18,781 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 [2022-07-21 11:05:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:18,810 INFO L225 Difference]: With dead ends: 20494 [2022-07-21 11:05:18,810 INFO L226 Difference]: Without dead ends: 10347 [2022-07-21 11:05:18,834 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 [2022-07-21 11:05:18,834 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 [2022-07-21 11:05:18,834 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] [2022-07-21 11:05:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2022-07-21 11:05:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10305. [2022-07-21 11:05:19,208 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) [2022-07-21 11:05:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10305 states to 10305 states and 13943 transitions. [2022-07-21 11:05:19,235 INFO L78 Accepts]: Start accepts. Automaton has 10305 states and 13943 transitions. Word has length 151 [2022-07-21 11:05:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:19,235 INFO L495 AbstractCegarLoop]: Abstraction has 10305 states and 13943 transitions. [2022-07-21 11:05:19,235 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) [2022-07-21 11:05:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 10305 states and 13943 transitions. [2022-07-21 11:05:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-21 11:05:19,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:19,246 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] [2022-07-21 11:05:19,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:19,447 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 [2022-07-21 11:05:19,447 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1154172383, now seen corresponding path program 1 times [2022-07-21 11:05:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332401203] [2022-07-21 11:05:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:19,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:19,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955746921] [2022-07-21 11:05:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:19,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:19,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:19,491 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) [2022-07-21 11:05:19,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 11:05:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 11:05:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:20,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 11:05:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332401203] [2022-07-21 11:05:20,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955746921] [2022-07-21 11:05:20,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955746921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 11:05:20,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 11:05:20,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-21 11:05:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936695695] [2022-07-21 11:05:20,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 11:05:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 11:05:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 11:05:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-21 11:05:20,264 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) [2022-07-21 11:05:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:21,531 INFO L93 Difference]: Finished difference Result 11362 states and 15467 transitions. [2022-07-21 11:05:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 11:05:21,532 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 [2022-07-21 11:05:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:21,563 INFO L225 Difference]: With dead ends: 11362 [2022-07-21 11:05:21,563 INFO L226 Difference]: Without dead ends: 11313 [2022-07-21 11:05:21,569 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 [2022-07-21 11:05:21,570 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 1202 mSDsluCounter, 2182 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 3165 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 11:05:21,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 3165 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 11:05:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-07-21 11:05:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11313. [2022-07-21 11:05:21,890 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) [2022-07-21 11:05:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 15347 transitions. [2022-07-21 11:05:21,916 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 15347 transitions. Word has length 153 [2022-07-21 11:05:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:21,917 INFO L495 AbstractCegarLoop]: Abstraction has 11313 states and 15347 transitions. [2022-07-21 11:05:21,917 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) [2022-07-21 11:05:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 15347 transitions. [2022-07-21 11:05:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-21 11:05:21,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:21,934 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] [2022-07-21 11:05:21,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:22,135 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 [2022-07-21 11:05:22,135 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -535217326, now seen corresponding path program 1 times [2022-07-21 11:05:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103760364] [2022-07-21 11:05:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:22,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:22,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415633322] [2022-07-21 11:05:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:22,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:22,175 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) [2022-07-21 11:05:22,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 11:05:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:22,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 11:05:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:22,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 11:05:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 11:05:23,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103760364] [2022-07-21 11:05:23,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415633322] [2022-07-21 11:05:23,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415633322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 11:05:23,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 11:05:23,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-21 11:05:23,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413582583] [2022-07-21 11:05:23,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 11:05:23,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 11:05:23,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 11:05:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-21 11:05:23,230 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) [2022-07-21 11:05:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:25,497 INFO L93 Difference]: Finished difference Result 13378 states and 18347 transitions. [2022-07-21 11:05:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 11:05:25,499 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 [2022-07-21 11:05:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:25,545 INFO L225 Difference]: With dead ends: 13378 [2022-07-21 11:05:25,545 INFO L226 Difference]: Without dead ends: 13329 [2022-07-21 11:05:25,555 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 [2022-07-21 11:05:25,556 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 2123 mSDsluCounter, 5190 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2167 SdHoareTripleChecker+Valid, 6173 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 11:05:25,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2167 Valid, 6173 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 11:05:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2022-07-21 11:05:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13329. [2022-07-21 11:05:25,929 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) [2022-07-21 11:05:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13329 states to 13329 states and 18155 transitions. [2022-07-21 11:05:25,959 INFO L78 Accepts]: Start accepts. Automaton has 13329 states and 18155 transitions. Word has length 182 [2022-07-21 11:05:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:25,959 INFO L495 AbstractCegarLoop]: Abstraction has 13329 states and 18155 transitions. [2022-07-21 11:05:25,960 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) [2022-07-21 11:05:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 13329 states and 18155 transitions. [2022-07-21 11:05:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-21 11:05:25,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:25,987 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] [2022-07-21 11:05:26,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:26,187 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 [2022-07-21 11:05:26,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash -999549107, now seen corresponding path program 2 times [2022-07-21 11:05:26,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:26,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441517872] [2022-07-21 11:05:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:26,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:26,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529296028] [2022-07-21 11:05:26,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 11:05:26,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:26,224 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) [2022-07-21 11:05:26,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 11:05:26,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 11:05:26,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 11:05:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 11:05:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-07-21 11:05:26,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:26,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441517872] [2022-07-21 11:05:26,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:26,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529296028] [2022-07-21 11:05:26,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529296028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:26,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:26,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 11:05:26,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883989967] [2022-07-21 11:05:26,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:26,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 11:05:26,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 11:05:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-21 11:05:26,745 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) [2022-07-21 11:05:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:27,680 INFO L93 Difference]: Finished difference Result 26858 states and 36750 transitions. [2022-07-21 11:05:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 11:05:27,681 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 [2022-07-21 11:05:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:27,731 INFO L225 Difference]: With dead ends: 26858 [2022-07-21 11:05:27,731 INFO L226 Difference]: Without dead ends: 13607 [2022-07-21 11:05:27,764 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 [2022-07-21 11:05:27,765 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 22 mSDsluCounter, 12132 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13151 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 11:05:27,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13151 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 11:05:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2022-07-21 11:05:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 13441. [2022-07-21 11:05:28,355 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) [2022-07-21 11:05:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 18263 transitions. [2022-07-21 11:05:28,402 INFO L78 Accepts]: Start accepts. Automaton has 13441 states and 18263 transitions. Word has length 225 [2022-07-21 11:05:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:28,403 INFO L495 AbstractCegarLoop]: Abstraction has 13441 states and 18263 transitions. [2022-07-21 11:05:28,403 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) [2022-07-21 11:05:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 13441 states and 18263 transitions. [2022-07-21 11:05:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-21 11:05:28,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:28,440 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] [2022-07-21 11:05:28,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:28,654 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 [2022-07-21 11:05:28,654 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1281005638, now seen corresponding path program 2 times [2022-07-21 11:05:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:28,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465626577] [2022-07-21 11:05:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:28,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:28,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342019262] [2022-07-21 11:05:28,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 11:05:28,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:28,693 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) [2022-07-21 11:05:28,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 11:05:29,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 11:05:29,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 11:05:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 11:05:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-07-21 11:05:29,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:29,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:29,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465626577] [2022-07-21 11:05:29,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342019262] [2022-07-21 11:05:29,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342019262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:29,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:29,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 11:05:29,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051160836] [2022-07-21 11:05:29,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 11:05:29,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 11:05:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-07-21 11:05:29,274 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) [2022-07-21 11:05:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:30,126 INFO L93 Difference]: Finished difference Result 27002 states and 36750 transitions. [2022-07-21 11:05:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 11:05:30,127 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 [2022-07-21 11:05:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:30,171 INFO L225 Difference]: With dead ends: 27002 [2022-07-21 11:05:30,172 INFO L226 Difference]: Without dead ends: 13639 [2022-07-21 11:05:30,203 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 [2022-07-21 11:05:30,203 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 [2022-07-21 11:05:30,204 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] [2022-07-21 11:05:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13639 states. [2022-07-21 11:05:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13639 to 13473. [2022-07-21 11:05:30,618 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) [2022-07-21 11:05:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13473 states to 13473 states and 18287 transitions. [2022-07-21 11:05:30,650 INFO L78 Accepts]: Start accepts. Automaton has 13473 states and 18287 transitions. Word has length 230 [2022-07-21 11:05:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:30,651 INFO L495 AbstractCegarLoop]: Abstraction has 13473 states and 18287 transitions. [2022-07-21 11:05:30,651 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) [2022-07-21 11:05:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13473 states and 18287 transitions. [2022-07-21 11:05:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-21 11:05:30,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:30,683 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] [2022-07-21 11:05:30,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-21 11:05:30,883 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 [2022-07-21 11:05:30,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash 898829726, now seen corresponding path program 1 times [2022-07-21 11:05:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:30,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779998734] [2022-07-21 11:05:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:30,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:30,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868422094] [2022-07-21 11:05:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:30,923 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) [2022-07-21 11:05:30,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 11:05:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 11:05:31,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2022-07-21 11:05:31,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:31,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779998734] [2022-07-21 11:05:31,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868422094] [2022-07-21 11:05:31,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868422094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:31,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:31,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 11:05:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355211126] [2022-07-21 11:05:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:31,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 11:05:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 11:05:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:05:31,374 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) [2022-07-21 11:05:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:31,922 INFO L93 Difference]: Finished difference Result 33000 states and 44681 transitions. [2022-07-21 11:05:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 11:05:31,923 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 [2022-07-21 11:05:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:31,969 INFO L225 Difference]: With dead ends: 33000 [2022-07-21 11:05:31,969 INFO L226 Difference]: Without dead ends: 19605 [2022-07-21 11:05:31,996 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 [2022-07-21 11:05:31,996 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 [2022-07-21 11:05:31,997 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] [2022-07-21 11:05:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19605 states. [2022-07-21 11:05:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19605 to 19592. [2022-07-21 11:05:32,564 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) [2022-07-21 11:05:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 26420 transitions. [2022-07-21 11:05:32,609 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 26420 transitions. Word has length 248 [2022-07-21 11:05:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:32,610 INFO L495 AbstractCegarLoop]: Abstraction has 19592 states and 26420 transitions. [2022-07-21 11:05:32,610 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) [2022-07-21 11:05:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 26420 transitions. [2022-07-21 11:05:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-21 11:05:32,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:32,668 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] [2022-07-21 11:05:32,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:32,883 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 [2022-07-21 11:05:32,884 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1092480309, now seen corresponding path program 1 times [2022-07-21 11:05:32,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:32,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133951703] [2022-07-21 11:05:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:32,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:32,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:32,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463211987] [2022-07-21 11:05:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:32,931 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) [2022-07-21 11:05:32,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 11:05:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:33,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 11:05:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-21 11:05:33,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:33,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:33,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133951703] [2022-07-21 11:05:33,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:33,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463211987] [2022-07-21 11:05:33,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463211987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:33,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:33,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 11:05:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462839345] [2022-07-21 11:05:33,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 11:05:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 11:05:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 11:05:33,410 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) [2022-07-21 11:05:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:34,574 INFO L93 Difference]: Finished difference Result 51112 states and 68818 transitions. [2022-07-21 11:05:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 11:05:34,575 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 [2022-07-21 11:05:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:34,660 INFO L225 Difference]: With dead ends: 51112 [2022-07-21 11:05:34,661 INFO L226 Difference]: Without dead ends: 31598 [2022-07-21 11:05:34,704 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 [2022-07-21 11:05:34,704 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 [2022-07-21 11:05:34,705 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] [2022-07-21 11:05:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31598 states. [2022-07-21 11:05:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31598 to 28788. [2022-07-21 11:05:35,707 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) [2022-07-21 11:05:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28788 states to 28788 states and 38692 transitions. [2022-07-21 11:05:35,786 INFO L78 Accepts]: Start accepts. Automaton has 28788 states and 38692 transitions. Word has length 261 [2022-07-21 11:05:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:35,787 INFO L495 AbstractCegarLoop]: Abstraction has 28788 states and 38692 transitions. [2022-07-21 11:05:35,787 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) [2022-07-21 11:05:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 28788 states and 38692 transitions. [2022-07-21 11:05:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-21 11:05:35,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:35,852 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] [2022-07-21 11:05:35,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-21 11:05:36,052 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 [2022-07-21 11:05:36,052 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 62685997, now seen corresponding path program 1 times [2022-07-21 11:05:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962726693] [2022-07-21 11:05:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:36,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812544877] [2022-07-21 11:05:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:36,091 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) [2022-07-21 11:05:36,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 11:05:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 11:05:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 68 proven. 12 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2022-07-21 11:05:36,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 11:05:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2022-07-21 11:05:37,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:37,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962726693] [2022-07-21 11:05:37,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:37,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812544877] [2022-07-21 11:05:37,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812544877] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 11:05:37,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 11:05:37,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2022-07-21 11:05:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595569445] [2022-07-21 11:05:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 11:05:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 11:05:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-21 11:05:37,269 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) [2022-07-21 11:05:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:44,338 INFO L93 Difference]: Finished difference Result 104556 states and 147739 transitions. [2022-07-21 11:05:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 11:05:44,338 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 [2022-07-21 11:05:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:44,715 INFO L225 Difference]: With dead ends: 104556 [2022-07-21 11:05:44,715 INFO L226 Difference]: Without dead ends: 85419 [2022-07-21 11:05:44,791 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 [2022-07-21 11:05:44,792 INFO L413 NwaCegarLoop]: 1844 mSDtfsCounter, 4854 mSDsluCounter, 3874 mSDsCounter, 0 mSdLazyCounter, 3863 mSolverCounterSat, 2046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5004 SdHoareTripleChecker+Valid, 5718 SdHoareTripleChecker+Invalid, 5909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2046 IncrementalHoareTripleChecker+Valid, 3863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-21 11:05:44,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5004 Valid, 5718 Invalid, 5909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2046 Valid, 3863 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-21 11:05:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85419 states. [2022-07-21 11:05:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85419 to 48089. [2022-07-21 11:05:47,749 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) [2022-07-21 11:05:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48089 states to 48089 states and 65519 transitions. [2022-07-21 11:05:47,873 INFO L78 Accepts]: Start accepts. Automaton has 48089 states and 65519 transitions. Word has length 255 [2022-07-21 11:05:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:47,874 INFO L495 AbstractCegarLoop]: Abstraction has 48089 states and 65519 transitions. [2022-07-21 11:05:47,874 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) [2022-07-21 11:05:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48089 states and 65519 transitions. [2022-07-21 11:05:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-21 11:05:48,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:48,031 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] [2022-07-21 11:05:48,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:48,247 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 [2022-07-21 11:05:48,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 972017135, now seen corresponding path program 1 times [2022-07-21 11:05:48,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:48,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737843396] [2022-07-21 11:05:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:48,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:48,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627029874] [2022-07-21 11:05:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:48,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:48,290 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) [2022-07-21 11:05:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 11:05:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 11:05:48,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-21 11:05:48,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:48,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737843396] [2022-07-21 11:05:48,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627029874] [2022-07-21 11:05:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627029874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:48,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 11:05:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761056562] [2022-07-21 11:05:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:48,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 11:05:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 11:05:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 11:05:48,778 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) [2022-07-21 11:05:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:50,916 INFO L93 Difference]: Finished difference Result 96130 states and 131000 transitions. [2022-07-21 11:05:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 11:05:50,917 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 [2022-07-21 11:05:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:51,073 INFO L225 Difference]: With dead ends: 96130 [2022-07-21 11:05:51,073 INFO L226 Difference]: Without dead ends: 48119 [2022-07-21 11:05:51,169 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 [2022-07-21 11:05:51,170 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 [2022-07-21 11:05:51,170 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] [2022-07-21 11:05:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48119 states. [2022-07-21 11:05:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48119 to 48119. [2022-07-21 11:05:53,790 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) [2022-07-21 11:05:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48119 states to 48119 states and 65549 transitions. [2022-07-21 11:05:53,909 INFO L78 Accepts]: Start accepts. Automaton has 48119 states and 65549 transitions. Word has length 263 [2022-07-21 11:05:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:05:53,910 INFO L495 AbstractCegarLoop]: Abstraction has 48119 states and 65549 transitions. [2022-07-21 11:05:53,910 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) [2022-07-21 11:05:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 48119 states and 65549 transitions. [2022-07-21 11:05:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-21 11:05:54,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:05:54,017 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] [2022-07-21 11:05:54,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 11:05:54,218 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 [2022-07-21 11:05:54,218 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:05:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:05:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash -785610003, now seen corresponding path program 1 times [2022-07-21 11:05:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:05:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035369390] [2022-07-21 11:05:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:54,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:05:54,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:05:54,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821999042] [2022-07-21 11:05:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:05:54,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:05:54,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:05:54,257 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) [2022-07-21 11:05:54,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 11:05:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:05:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 11:05:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:05:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2022-07-21 11:05:54,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:05:54,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:05:54,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035369390] [2022-07-21 11:05:54,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:05:54,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821999042] [2022-07-21 11:05:54,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821999042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:05:54,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:05:54,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 11:05:54,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630771086] [2022-07-21 11:05:54,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:05:54,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 11:05:54,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:05:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 11:05:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 11:05:54,714 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) [2022-07-21 11:05:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:05:58,625 INFO L93 Difference]: Finished difference Result 115958 states and 157846 transitions. [2022-07-21 11:05:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 11:05:58,626 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 [2022-07-21 11:05:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:05:58,981 INFO L225 Difference]: With dead ends: 115958 [2022-07-21 11:05:58,981 INFO L226 Difference]: Without dead ends: 67917 [2022-07-21 11:05:59,073 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 [2022-07-21 11:05:59,074 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 [2022-07-21 11:05:59,074 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] [2022-07-21 11:05:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67917 states. [2022-07-21 11:06:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67917 to 48119. [2022-07-21 11:06:02,238 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) [2022-07-21 11:06:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48119 states to 48119 states and 65549 transitions. [2022-07-21 11:06:02,385 INFO L78 Accepts]: Start accepts. Automaton has 48119 states and 65549 transitions. Word has length 263 [2022-07-21 11:06:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 11:06:02,386 INFO L495 AbstractCegarLoop]: Abstraction has 48119 states and 65549 transitions. [2022-07-21 11:06:02,386 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) [2022-07-21 11:06:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 48119 states and 65549 transitions. [2022-07-21 11:06:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-21 11:06:02,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 11:06:02,514 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, 1, 1] [2022-07-21 11:06:02,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-21 11:06:02,714 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 [2022-07-21 11:06:02,715 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 11:06:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 11:06:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1590263092, now seen corresponding path program 1 times [2022-07-21 11:06:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 11:06:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957398913] [2022-07-21 11:06:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:06:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 11:06:02,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 11:06:02,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624876905] [2022-07-21 11:06:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 11:06:02,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 11:06:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 11:06:02,758 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) [2022-07-21 11:06:02,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 11:06:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 11:06:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 11:06:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 11:06:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2022-07-21 11:06:03,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 11:06:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 11:06:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957398913] [2022-07-21 11:06:03,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 11:06:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624876905] [2022-07-21 11:06:03,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624876905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 11:06:03,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 11:06:03,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 11:06:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847874976] [2022-07-21 11:06:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 11:06:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 11:06:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 11:06:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 11:06:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 11:06:03,299 INFO L87 Difference]: Start difference. First operand 48119 states and 65549 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2022-07-21 11:06:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 11:06:06,097 INFO L93 Difference]: Finished difference Result 86419 states and 118998 transitions. [2022-07-21 11:06:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 11:06:06,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) Word has length 257 [2022-07-21 11:06:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 11:06:06,248 INFO L225 Difference]: With dead ends: 86419 [2022-07-21 11:06:06,249 INFO L226 Difference]: Without dead ends: 48121 [2022-07-21 11:06:06,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 11:06:06,331 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 13 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 11:06:06,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2961 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 11:06:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48121 states.