./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/heap-manipulation/bubble_sort_linux-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash a38de44f112a10364737c35b840e673503a211a020b9f494a50e4a32c8fe31c0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:25:19,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:25:19,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:25:19,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:25:19,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:25:19,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:25:19,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:25:19,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:25:19,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:25:19,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:25:19,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:25:19,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:25:19,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:25:19,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:25:19,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:25:19,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:25:19,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:25:19,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:25:19,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:25:19,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:25:19,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:25:19,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:25:19,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:25:19,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:25:19,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:25:19,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:25:19,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:25:19,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:25:19,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:25:19,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:25:19,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:25:19,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:25:19,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:25:19,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:25:19,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:25:19,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:25:19,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:25:19,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:25:19,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:25:19,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:25:19,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:25:19,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:25:19,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:25:19,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:25:19,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:25:19,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:25:19,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:25:19,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:25:19,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:25:19,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:25:19,279 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:25:19,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:25:19,279 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:25:19,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:25:19,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:25:19,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:25:19,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:25:19,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:25:19,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:25:19,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:25:19,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:25:19,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:25:19,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:25:19,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:25:19,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:25:19,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:25:19,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:25:19,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:25:19,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:25:19,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:25:19,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:25:19,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:25:19,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:25:19,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:25:19,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:25:19,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:25:19,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a38de44f112a10364737c35b840e673503a211a020b9f494a50e4a32c8fe31c0 [2021-12-22 10:25:19,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:25:19,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:25:19,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:25:19,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:25:19,465 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:25:19,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-1.i [2021-12-22 10:25:19,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bf94534/ea003be6bd0d49129a68025f2a384a68/FLAG4ccf78abd [2021-12-22 10:25:19,859 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:25:19,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-1.i [2021-12-22 10:25:19,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bf94534/ea003be6bd0d49129a68025f2a384a68/FLAG4ccf78abd [2021-12-22 10:25:20,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bf94534/ea003be6bd0d49129a68025f2a384a68 [2021-12-22 10:25:20,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:25:20,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:25:20,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:25:20,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:25:20,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:25:20,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67606bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20, skipping insertion in model container [2021-12-22 10:25:20,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:25:20,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:25:20,682 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/heap-manipulation/bubble_sort_linux-1.i[33822,33835] [2021-12-22 10:25:20,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:20,720 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:25:20,762 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/heap-manipulation/bubble_sort_linux-1.i[33822,33835] [2021-12-22 10:25:20,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:20,826 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:25:20,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20 WrapperNode [2021-12-22 10:25:20,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:25:20,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:25:20,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:25:20,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:25:20,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,887 INFO L137 Inliner]: procedures = 232, calls = 75, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 116 [2021-12-22 10:25:20,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:25:20,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:25:20,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:25:20,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:25:20,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:25:20,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:25:20,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:25:20,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:25:20,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (1/1) ... [2021-12-22 10:25:20,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:25:20,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:20,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:25:21,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:25:21,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 10:25:21,022 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2021-12-22 10:25:21,022 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2021-12-22 10:25:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:25:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 10:25:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2021-12-22 10:25:21,023 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2021-12-22 10:25:21,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 10:25:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-22 10:25:21,024 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-22 10:25:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 10:25:21,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:25:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:25:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 10:25:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-22 10:25:21,025 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-22 10:25:21,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:25:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:25:21,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:25:21,118 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:25:21,119 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:25:21,433 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:25:21,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:25:21,438 INFO L299 CfgBuilder]: Removed 41 assume(true) statements. [2021-12-22 10:25:21,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:21 BoogieIcfgContainer [2021-12-22 10:25:21,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:25:21,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:25:21,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:25:21,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:25:21,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:20" (1/3) ... [2021-12-22 10:25:21,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324757ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:21, skipping insertion in model container [2021-12-22 10:25:21,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:20" (2/3) ... [2021-12-22 10:25:21,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324757ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:21, skipping insertion in model container [2021-12-22 10:25:21,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:21" (3/3) ... [2021-12-22 10:25:21,445 INFO L111 eAbstractionObserver]: Analyzing ICFG bubble_sort_linux-1.i [2021-12-22 10:25:21,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:25:21,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:25:21,490 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:25:21,496 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:25:21,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:25:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 118 states, 89 states have (on average 1.7415730337078652) internal successors, (155), 108 states have internal predecessors, (155), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-22 10:25:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 10:25:21,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:21,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:21,521 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1761516263, now seen corresponding path program 1 times [2021-12-22 10:25:21,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:21,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531378483] [2021-12-22 10:25:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:21,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:21,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:21,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531378483] [2021-12-22 10:25:21,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531378483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:21,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:21,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:25:21,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110087030] [2021-12-22 10:25:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:21,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:25:21,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:25:21,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:25:21,664 INFO L87 Difference]: Start difference. First operand has 118 states, 89 states have (on average 1.7415730337078652) internal successors, (155), 108 states have internal predecessors, (155), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:21,728 INFO L93 Difference]: Finished difference Result 230 states and 397 transitions. [2021-12-22 10:25:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:25:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 10:25:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:21,736 INFO L225 Difference]: With dead ends: 230 [2021-12-22 10:25:21,736 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 10:25:21,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:25:21,744 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:21,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 10:25:21,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-22 10:25:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 97 states have internal predecessors, (102), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:25:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2021-12-22 10:25:21,782 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 9 [2021-12-22 10:25:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:21,782 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2021-12-22 10:25:21,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2021-12-22 10:25:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 10:25:21,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:21,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:21,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:25:21,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 849043181, now seen corresponding path program 1 times [2021-12-22 10:25:21,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476443049] [2021-12-22 10:25:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:21,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:21,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:21,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476443049] [2021-12-22 10:25:21,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476443049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:21,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:21,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:25:21,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107549121] [2021-12-22 10:25:21,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:21,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:25:21,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:25:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:25:21,996 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:22,227 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-12-22 10:25:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:25:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-22 10:25:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:22,232 INFO L225 Difference]: With dead ends: 109 [2021-12-22 10:25:22,233 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 10:25:22,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:25:22,237 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 238 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:22,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 228 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:25:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 10:25:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-22 10:25:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 96 states have internal predecessors, (101), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:25:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2021-12-22 10:25:22,255 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 21 [2021-12-22 10:25:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2021-12-22 10:25:22,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2021-12-22 10:25:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 10:25:22,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:22,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:22,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:25:22,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 502050183, now seen corresponding path program 1 times [2021-12-22 10:25:22,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:22,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408105072] [2021-12-22 10:25:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:22,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:22,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:22,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408105072] [2021-12-22 10:25:22,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408105072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:22,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:22,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 10:25:22,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166434095] [2021-12-22 10:25:22,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:22,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:25:22,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:22,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:25:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 10:25:22,427 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:23,079 INFO L93 Difference]: Finished difference Result 198 states and 235 transitions. [2021-12-22 10:25:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 10:25:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-22 10:25:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:23,082 INFO L225 Difference]: With dead ends: 198 [2021-12-22 10:25:23,082 INFO L226 Difference]: Without dead ends: 192 [2021-12-22 10:25:23,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-22 10:25:23,083 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 518 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:23,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 239 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:25:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-22 10:25:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 172. [2021-12-22 10:25:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 144 states have (on average 1.2430555555555556) internal successors, (179), 158 states have internal predecessors, (179), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 10:25:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2021-12-22 10:25:23,096 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 24 [2021-12-22 10:25:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:23,097 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2021-12-22 10:25:23,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2021-12-22 10:25:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 10:25:23,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:23,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:23,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:25:23,098 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1234303898, now seen corresponding path program 1 times [2021-12-22 10:25:23,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:23,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894235916] [2021-12-22 10:25:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:23,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:23,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894235916] [2021-12-22 10:25:23,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894235916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:23,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:23,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 10:25:23,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712628952] [2021-12-22 10:25:23,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:23,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:25:23,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:25:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 10:25:23,324 INFO L87 Difference]: Start difference. First operand 172 states and 209 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:23,923 INFO L93 Difference]: Finished difference Result 274 states and 329 transitions. [2021-12-22 10:25:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 10:25:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-22 10:25:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:23,925 INFO L225 Difference]: With dead ends: 274 [2021-12-22 10:25:23,925 INFO L226 Difference]: Without dead ends: 271 [2021-12-22 10:25:23,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-12-22 10:25:23,934 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 286 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:23,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 330 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:25:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-22 10:25:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 253. [2021-12-22 10:25:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 218 states have (on average 1.238532110091743) internal successors, (270), 233 states have internal predecessors, (270), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:25:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 309 transitions. [2021-12-22 10:25:23,968 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 309 transitions. Word has length 27 [2021-12-22 10:25:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:23,968 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 309 transitions. [2021-12-22 10:25:23,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 309 transitions. [2021-12-22 10:25:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 10:25:23,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:23,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:23,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 10:25:23,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:23,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1680148119, now seen corresponding path program 1 times [2021-12-22 10:25:23,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:23,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527877375] [2021-12-22 10:25:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:23,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:24,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527877375] [2021-12-22 10:25:24,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527877375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:24,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:24,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 10:25:24,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211324899] [2021-12-22 10:25:24,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:24,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 10:25:24,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 10:25:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:25:24,294 INFO L87 Difference]: Start difference. First operand 253 states and 309 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:24,902 INFO L93 Difference]: Finished difference Result 273 states and 327 transitions. [2021-12-22 10:25:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 10:25:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 10:25:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:24,903 INFO L225 Difference]: With dead ends: 273 [2021-12-22 10:25:24,903 INFO L226 Difference]: Without dead ends: 270 [2021-12-22 10:25:24,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-22 10:25:24,904 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 331 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:24,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 318 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:25:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-22 10:25:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 253. [2021-12-22 10:25:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 218 states have (on average 1.2339449541284404) internal successors, (269), 233 states have internal predecessors, (269), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:25:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 308 transitions. [2021-12-22 10:25:24,931 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 308 transitions. Word has length 30 [2021-12-22 10:25:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:24,931 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 308 transitions. [2021-12-22 10:25:24,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 308 transitions. [2021-12-22 10:25:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 10:25:24,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:24,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:24,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 10:25:24,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:24,933 INFO L85 PathProgramCache]: Analyzing trace with hash -493122043, now seen corresponding path program 1 times [2021-12-22 10:25:24,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:24,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311388022] [2021-12-22 10:25:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:24,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:25,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:25,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311388022] [2021-12-22 10:25:25,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311388022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:25,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:25,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 10:25:25,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237431749] [2021-12-22 10:25:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:25,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 10:25:25,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 10:25:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-22 10:25:25,307 INFO L87 Difference]: Start difference. First operand 253 states and 308 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:26,113 INFO L93 Difference]: Finished difference Result 272 states and 325 transitions. [2021-12-22 10:25:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 10:25:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-22 10:25:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:26,115 INFO L225 Difference]: With dead ends: 272 [2021-12-22 10:25:26,115 INFO L226 Difference]: Without dead ends: 269 [2021-12-22 10:25:26,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-12-22 10:25:26,116 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 338 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:26,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 321 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 10:25:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-22 10:25:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 253. [2021-12-22 10:25:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 218 states have (on average 1.2293577981651376) internal successors, (268), 233 states have internal predecessors, (268), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:25:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 307 transitions. [2021-12-22 10:25:26,127 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 307 transitions. Word has length 33 [2021-12-22 10:25:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:26,127 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 307 transitions. [2021-12-22 10:25:26,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 307 transitions. [2021-12-22 10:25:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 10:25:26,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:26,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:26,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 10:25:26,128 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2033122620, now seen corresponding path program 1 times [2021-12-22 10:25:26,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977176400] [2021-12-22 10:25:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:26,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:26,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:26,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977176400] [2021-12-22 10:25:26,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977176400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:26,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:26,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 10:25:26,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065011108] [2021-12-22 10:25:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:26,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:25:26,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:25:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:25:26,395 INFO L87 Difference]: Start difference. First operand 253 states and 307 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:27,172 INFO L93 Difference]: Finished difference Result 271 states and 323 transitions. [2021-12-22 10:25:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 10:25:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-22 10:25:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:27,174 INFO L225 Difference]: With dead ends: 271 [2021-12-22 10:25:27,174 INFO L226 Difference]: Without dead ends: 268 [2021-12-22 10:25:27,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-12-22 10:25:27,175 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 309 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:27,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 344 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 10:25:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-22 10:25:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 253. [2021-12-22 10:25:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 218 states have (on average 1.224770642201835) internal successors, (267), 233 states have internal predecessors, (267), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:25:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 306 transitions. [2021-12-22 10:25:27,189 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 306 transitions. Word has length 36 [2021-12-22 10:25:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:27,189 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 306 transitions. [2021-12-22 10:25:27,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 306 transitions. [2021-12-22 10:25:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 10:25:27,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:27,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:27,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 10:25:27,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:27,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1335339115, now seen corresponding path program 1 times [2021-12-22 10:25:27,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:27,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036621373] [2021-12-22 10:25:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:27,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:27,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036621373] [2021-12-22 10:25:27,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036621373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:27,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:27,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 10:25:27,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894741085] [2021-12-22 10:25:27,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:27,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:25:27,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:25:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:25:27,385 INFO L87 Difference]: Start difference. First operand 253 states and 306 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:27,954 INFO L93 Difference]: Finished difference Result 270 states and 321 transitions. [2021-12-22 10:25:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 10:25:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-22 10:25:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:27,956 INFO L225 Difference]: With dead ends: 270 [2021-12-22 10:25:27,956 INFO L226 Difference]: Without dead ends: 267 [2021-12-22 10:25:27,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-12-22 10:25:27,957 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 411 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:27,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 327 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:25:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-22 10:25:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 253. [2021-12-22 10:25:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 218 states have (on average 1.2201834862385321) internal successors, (266), 233 states have internal predecessors, (266), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:25:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2021-12-22 10:25:27,993 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 39 [2021-12-22 10:25:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:27,993 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2021-12-22 10:25:27,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2021-12-22 10:25:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 10:25:27,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:27,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:27,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 10:25:27,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1154705564, now seen corresponding path program 1 times [2021-12-22 10:25:27,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:25:27,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411613295] [2021-12-22 10:25:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:27,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:25:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:28,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 10:25:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:28,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 10:25:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:25:28,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:25:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411613295] [2021-12-22 10:25:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411613295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:25:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458118214] [2021-12-22 10:25:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:28,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:28,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:25:28,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:25:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:28,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-22 10:25:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:28,638 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 10:25:28,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 10:25:28,714 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 10:25:28,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 10:25:28,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:25:28,752 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:25:28,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-22 10:25:28,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:25:28,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:29,008 INFO L353 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2021-12-22 10:25:29,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 51 [2021-12-22 10:25:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:29,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-12-22 10:25:29,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-22 10:25:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:29,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-22 10:25:29,105 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:25:29,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-12-22 10:25:29,253 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:25:29,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:25:29,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-22 10:25:29,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:29,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2021-12-22 10:25:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:29,457 INFO L353 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2021-12-22 10:25:29,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 53 [2021-12-22 10:25:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:29,470 INFO L353 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2021-12-22 10:25:29,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 50 [2021-12-22 10:25:29,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:29,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-12-22 10:25:29,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:29,549 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-22 10:25:29,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 50 [2021-12-22 10:25:29,553 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-22 10:25:29,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:25:29,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-22 10:25:29,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582597047] [2021-12-22 10:25:29,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 10:25:29,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 10:25:29,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:25:29,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 10:25:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=474, Unknown=16, NotChecked=0, Total=552 [2021-12-22 10:25:29,554 INFO L87 Difference]: Start difference. First operand 253 states and 305 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 10:25:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:25:29,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=474, Unknown=16, NotChecked=0, Total=552 [2021-12-22 10:25:29,555 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:29,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:29,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:29,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:25:29,773 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@458d29e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-22 10:25:29,777 INFO L158 Benchmark]: Toolchain (without parser) took 9531.27ms. Allocated memory was 109.1MB in the beginning and 224.4MB in the end (delta: 115.3MB). Free memory was 79.7MB in the beginning and 139.7MB in the end (delta: -60.0MB). Peak memory consumption was 56.0MB. Max. memory is 16.1GB. [2021-12-22 10:25:29,777 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:25:29,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 579.37ms. Allocated memory was 109.1MB in the beginning and 138.4MB in the end (delta: 29.4MB). Free memory was 79.3MB in the beginning and 98.4MB in the end (delta: -19.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 10:25:29,777 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.07ms. Allocated memory is still 138.4MB. Free memory was 98.4MB in the beginning and 96.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:25:29,777 INFO L158 Benchmark]: Boogie Preprocessor took 58.17ms. Allocated memory is still 138.4MB. Free memory was 96.3MB in the beginning and 93.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:25:29,777 INFO L158 Benchmark]: RCFGBuilder took 492.24ms. Allocated memory is still 138.4MB. Free memory was 93.6MB in the beginning and 72.0MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-22 10:25:29,778 INFO L158 Benchmark]: TraceAbstraction took 8335.54ms. Allocated memory was 138.4MB in the beginning and 224.4MB in the end (delta: 86.0MB). Free memory was 72.0MB in the beginning and 139.7MB in the end (delta: -67.7MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. [2021-12-22 10:25:29,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 579.37ms. Allocated memory was 109.1MB in the beginning and 138.4MB in the end (delta: 29.4MB). Free memory was 79.3MB in the beginning and 98.4MB in the end (delta: -19.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.07ms. Allocated memory is still 138.4MB. Free memory was 98.4MB in the beginning and 96.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.17ms. Allocated memory is still 138.4MB. Free memory was 96.3MB in the beginning and 93.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 492.24ms. Allocated memory is still 138.4MB. Free memory was 93.6MB in the beginning and 72.0MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8335.54ms. Allocated memory was 138.4MB in the beginning and 224.4MB in the end (delta: 86.0MB). Free memory was 72.0MB in the beginning and 139.7MB in the end (delta: -67.7MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@458d29e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@458d29e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-22 10:25:29,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/heap-manipulation/bubble_sort_linux-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 32bit --witnessprinter.graph.data.programhash a38de44f112a10364737c35b840e673503a211a020b9f494a50e4a32c8fe31c0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:25:31,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:25:31,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:25:31,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:25:31,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:25:31,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:25:31,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:25:31,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:25:31,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:25:31,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:25:31,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:25:31,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:25:31,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:25:31,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:25:31,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:25:31,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:25:31,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:25:31,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:25:31,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:25:31,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:25:31,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:25:31,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:25:31,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:25:31,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:25:31,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:25:31,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:25:31,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:25:31,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:25:31,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:25:31,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:25:31,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:25:31,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:25:31,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:25:31,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:25:31,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:25:31,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:25:31,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:25:31,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:25:31,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:25:31,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:25:31,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:25:31,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-22 10:25:31,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:25:31,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:25:31,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:25:31,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:25:31,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:25:31,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:25:31,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:25:31,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:25:31,622 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:25:31,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:25:31,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:25:31,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:25:31,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:25:31,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:25:31,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:25:31,624 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:25:31,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:25:31,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:25:31,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:25:31,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:25:31,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:25:31,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:25:31,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:25:31,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:25:31,626 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 10:25:31,626 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 10:25:31,626 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:25:31,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:25:31,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:25:31,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:25:31,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 10:25:31,627 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a38de44f112a10364737c35b840e673503a211a020b9f494a50e4a32c8fe31c0 [2021-12-22 10:25:31,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:25:31,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:25:31,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:25:31,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:25:31,928 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:25:31,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-1.i [2021-12-22 10:25:31,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9153ee008/8c548930f7a949a18df46965f3bd2fb8/FLAGe7654fd7b [2021-12-22 10:25:32,426 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:25:32,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-1.i [2021-12-22 10:25:32,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9153ee008/8c548930f7a949a18df46965f3bd2fb8/FLAGe7654fd7b [2021-12-22 10:25:32,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9153ee008/8c548930f7a949a18df46965f3bd2fb8 [2021-12-22 10:25:32,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:25:32,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:25:32,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:25:32,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:25:32,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:25:32,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:32" (1/1) ... [2021-12-22 10:25:32,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70756861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:32, skipping insertion in model container [2021-12-22 10:25:32,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:25:32" (1/1) ... [2021-12-22 10:25:32,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:25:32,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:25:32,928 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/heap-manipulation/bubble_sort_linux-1.i[33822,33835] [2021-12-22 10:25:32,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:33,005 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 10:25:33,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:25:33,047 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/heap-manipulation/bubble_sort_linux-1.i[33822,33835] [2021-12-22 10:25:33,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:33,097 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:25:33,141 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/heap-manipulation/bubble_sort_linux-1.i[33822,33835] [2021-12-22 10:25:33,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:25:33,238 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:25:33,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33 WrapperNode [2021-12-22 10:25:33,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:25:33,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:25:33,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:25:33,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:25:33,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,326 INFO L137 Inliner]: procedures = 235, calls = 75, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 113 [2021-12-22 10:25:33,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:25:33,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:25:33,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:25:33,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:25:33,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:25:33,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:25:33,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:25:33,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:25:33,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (1/1) ... [2021-12-22 10:25:33,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:25:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:25:33,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:25:33,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:25:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-22 10:25:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 10:25:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2021-12-22 10:25:33,512 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2021-12-22 10:25:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2021-12-22 10:25:33,513 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-22 10:25:33,513 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:25:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:25:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 10:25:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-22 10:25:33,514 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-22 10:25:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:25:33,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:25:33,599 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:25:33,601 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:25:33,937 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:25:33,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:25:33,942 INFO L299 CfgBuilder]: Removed 41 assume(true) statements. [2021-12-22 10:25:33,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:33 BoogieIcfgContainer [2021-12-22 10:25:33,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:25:33,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:25:33,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:25:33,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:25:33,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:25:32" (1/3) ... [2021-12-22 10:25:33,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfbb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:33, skipping insertion in model container [2021-12-22 10:25:33,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:25:33" (2/3) ... [2021-12-22 10:25:33,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfbb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:25:33, skipping insertion in model container [2021-12-22 10:25:33,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:25:33" (3/3) ... [2021-12-22 10:25:33,949 INFO L111 eAbstractionObserver]: Analyzing ICFG bubble_sort_linux-1.i [2021-12-22 10:25:33,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:25:33,952 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:25:33,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:25:33,990 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:25:33,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:25:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 88 states have (on average 1.75) internal successors, (154), 107 states have internal predecessors, (154), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-22 10:25:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 10:25:34,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,008 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,011 INFO L85 PathProgramCache]: Analyzing trace with hash 844459879, now seen corresponding path program 1 times [2021-12-22 10:25:34,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:25:34,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96673918] [2021-12-22 10:25:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:25:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:25:34,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:25:34,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 10:25:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 10:25:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:34,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:25:34,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:25:34,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96673918] [2021-12-22 10:25:34,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96673918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:25:34,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912118952] [2021-12-22 10:25:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:25:34,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:25:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:25:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:25:34,169 INFO L87 Difference]: Start difference. First operand has 117 states, 88 states have (on average 1.75) internal successors, (154), 107 states have internal predecessors, (154), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,193 INFO L93 Difference]: Finished difference Result 228 states and 395 transitions. [2021-12-22 10:25:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:25:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 10:25:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,204 INFO L225 Difference]: With dead ends: 228 [2021-12-22 10:25:34,204 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 10:25:34,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:25:34,210 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:25:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 10:25:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-22 10:25:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 96 states have internal predecessors, (101), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:25:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2021-12-22 10:25:34,254 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 9 [2021-12-22 10:25:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,255 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2021-12-22 10:25:34,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:25:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2021-12-22 10:25:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 10:25:34,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 10:25:34,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:25:34,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1622181416, now seen corresponding path program 1 times [2021-12-22 10:25:34,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:25:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912783525] [2021-12-22 10:25:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:25:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:25:34,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:25:34,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 10:25:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:25:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:34,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:25:34,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:25:34,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912783525] [2021-12-22 10:25:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912783525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:34,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:25:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58732650] [2021-12-22 10:25:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:34,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:25:34,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:25:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:25:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:25:34,666 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:34,760 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2021-12-22 10:25:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:25:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-22 10:25:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:34,761 INFO L225 Difference]: With dead ends: 108 [2021-12-22 10:25:34,761 INFO L226 Difference]: Without dead ends: 105 [2021-12-22 10:25:34,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:25:34,762 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 169 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:34,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 253 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:25:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-22 10:25:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-22 10:25:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 95 states have internal predecessors, (100), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 10:25:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2021-12-22 10:25:34,769 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 20 [2021-12-22 10:25:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:34,770 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2021-12-22 10:25:34,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2021-12-22 10:25:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 10:25:34,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:34,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:34,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-22 10:25:34,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:25:34,980 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash -845475890, now seen corresponding path program 1 times [2021-12-22 10:25:34,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:25:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319634679] [2021-12-22 10:25:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:34,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:25:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:25:34,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:25:34,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 10:25:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:35,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 10:25:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:35,193 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:25:35,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:25:35,350 INFO L353 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2021-12-22 10:25:35,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 182 [2021-12-22 10:25:35,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:25:35,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:25:35,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:25:35,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:25:35,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-12-22 10:25:35,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:25:35,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:25:35,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 10:25:35,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:25:35,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:35,914 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:25:35,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-12-22 10:25:35,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:25:36,017 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:25:36,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-22 10:25:36,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:25:36,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2021-12-22 10:25:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:36,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:25:36,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:25:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319634679] [2021-12-22 10:25:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319634679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:36,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:36,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 10:25:36,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786805040] [2021-12-22 10:25:36,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:36,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:25:36,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:25:36,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:25:36,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 10:25:36,113 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:37,469 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2021-12-22 10:25:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 10:25:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-22 10:25:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:37,472 INFO L225 Difference]: With dead ends: 197 [2021-12-22 10:25:37,474 INFO L226 Difference]: Without dead ends: 191 [2021-12-22 10:25:37,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-12-22 10:25:37,475 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 378 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:37,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 548 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 10:25:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-22 10:25:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 171. [2021-12-22 10:25:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 143 states have (on average 1.2447552447552448) internal successors, (178), 157 states have internal predecessors, (178), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-22 10:25:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 208 transitions. [2021-12-22 10:25:37,496 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 208 transitions. Word has length 23 [2021-12-22 10:25:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:37,496 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 208 transitions. [2021-12-22 10:25:37,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 208 transitions. [2021-12-22 10:25:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 10:25:37,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:37,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:37,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-22 10:25:37,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:25:37,707 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:37,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2145302357, now seen corresponding path program 1 times [2021-12-22 10:25:37,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:25:37,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714933591] [2021-12-22 10:25:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:37,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:25:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:25:37,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:25:37,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 10:25:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:37,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 10:25:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:38,072 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:25:38,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:25:38,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:25:38,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:25:38,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:38,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:38,699 INFO L353 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2021-12-22 10:25:38,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 86 [2021-12-22 10:25:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:38,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 59 [2021-12-22 10:25:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:38,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 10:25:38,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 73 [2021-12-22 10:25:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:38,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-12-22 10:25:38,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2021-12-22 10:25:38,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:38,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-22 10:25:38,752 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:25:38,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-12-22 10:25:38,831 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 10:25:38,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-12-22 10:25:38,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-12-22 10:25:39,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:25:39,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-22 10:25:39,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-22 10:25:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:39,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:25:39,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:25:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714933591] [2021-12-22 10:25:39,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714933591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:39,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:39,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 10:25:39,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497238746] [2021-12-22 10:25:39,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:39,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:25:39,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:25:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:25:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=85, Unknown=5, NotChecked=0, Total=110 [2021-12-22 10:25:39,148 INFO L87 Difference]: Start difference. First operand 171 states and 208 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:25:40,829 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2021-12-22 10:25:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 10:25:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-22 10:25:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:25:40,831 INFO L225 Difference]: With dead ends: 275 [2021-12-22 10:25:40,831 INFO L226 Difference]: Without dead ends: 272 [2021-12-22 10:25:40,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=205, Unknown=11, NotChecked=0, Total=272 [2021-12-22 10:25:40,832 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 231 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:25:40,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 460 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 669 Invalid, 0 Unknown, 125 Unchecked, 1.3s Time] [2021-12-22 10:25:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-22 10:25:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 255. [2021-12-22 10:25:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 219 states have (on average 1.2374429223744292) internal successors, (271), 234 states have internal predecessors, (271), 28 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:25:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 310 transitions. [2021-12-22 10:25:40,856 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 310 transitions. Word has length 26 [2021-12-22 10:25:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:25:40,856 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 310 transitions. [2021-12-22 10:25:40,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:25:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 310 transitions. [2021-12-22 10:25:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 10:25:40,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:25:40,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:25:40,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:25:41,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:25:41,067 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:25:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:25:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1337820254, now seen corresponding path program 1 times [2021-12-22 10:25:41,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:25:41,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568328921] [2021-12-22 10:25:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:25:41,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:25:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:25:41,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:25:41,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 10:25:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:25:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-22 10:25:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:25:41,328 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:25:41,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:25:41,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:25:41,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:25:41,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:41,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:25:49,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 101 [2021-12-22 10:25:49,606 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:25:49,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 37 [2021-12-22 10:25:51,671 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 10:25:51,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-12-22 10:25:51,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 10:25:53,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:25:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:25:53,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:25:53,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:25:53,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568328921] [2021-12-22 10:25:53,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568328921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:25:53,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:25:53,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 10:25:53,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255883624] [2021-12-22 10:25:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:25:53,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:25:53,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:25:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:25:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=85, Unknown=5, NotChecked=0, Total=110 [2021-12-22 10:25:53,871 INFO L87 Difference]: Start difference. First operand 255 states and 310 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:26:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:26:07,115 INFO L93 Difference]: Finished difference Result 274 states and 327 transitions. [2021-12-22 10:26:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 10:26:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-22 10:26:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:26:07,117 INFO L225 Difference]: With dead ends: 274 [2021-12-22 10:26:07,117 INFO L226 Difference]: Without dead ends: 271 [2021-12-22 10:26:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=54, Invalid=207, Unknown=11, NotChecked=0, Total=272 [2021-12-22 10:26:07,118 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 256 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:26:07,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 534 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 658 Invalid, 0 Unknown, 212 Unchecked, 1.0s Time] [2021-12-22 10:26:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-22 10:26:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 255. [2021-12-22 10:26:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 219 states have (on average 1.2328767123287672) internal successors, (270), 234 states have internal predecessors, (270), 28 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:26:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 309 transitions. [2021-12-22 10:26:07,148 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 309 transitions. Word has length 29 [2021-12-22 10:26:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:26:07,148 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 309 transitions. [2021-12-22 10:26:07,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:26:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 309 transitions. [2021-12-22 10:26:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 10:26:07,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:26:07,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:26:07,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:26:07,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:26:07,354 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:26:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:26:07,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1765703232, now seen corresponding path program 1 times [2021-12-22 10:26:07,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:26:07,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491817833] [2021-12-22 10:26:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:07,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:26:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:26:07,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:26:07,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 10:26:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-22 10:26:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:26:07,613 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:26:07,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:26:07,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:26:07,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:26:07,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:26:07,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:26:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:10,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:10,341 INFO L353 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-22 10:26:10,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 81 [2021-12-22 10:26:10,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2021-12-22 10:26:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:10,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-22 10:26:10,371 INFO L353 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2021-12-22 10:26:10,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 10:26:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:10,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:10,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:10,671 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-22 10:26:10,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 57 [2021-12-22 10:26:10,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-22 10:26:11,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 10:26:11,182 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-12-22 10:26:11,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2021-12-22 10:26:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:26:11,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:26:11,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:26:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491817833] [2021-12-22 10:26:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491817833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:26:11,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:26:11,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 10:26:11,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616291749] [2021-12-22 10:26:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:26:11,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:26:11,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:26:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:26:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=106, Unknown=4, NotChecked=0, Total=132 [2021-12-22 10:26:11,236 INFO L87 Difference]: Start difference. First operand 255 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:26:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:26:13,351 INFO L93 Difference]: Finished difference Result 273 states and 325 transitions. [2021-12-22 10:26:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 10:26:13,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-22 10:26:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:26:13,355 INFO L225 Difference]: With dead ends: 273 [2021-12-22 10:26:13,355 INFO L226 Difference]: Without dead ends: 270 [2021-12-22 10:26:13,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=66, Invalid=265, Unknown=11, NotChecked=0, Total=342 [2021-12-22 10:26:13,356 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 246 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:26:13,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 567 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 751 Invalid, 0 Unknown, 146 Unchecked, 1.5s Time] [2021-12-22 10:26:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-22 10:26:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 255. [2021-12-22 10:26:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 219 states have (on average 1.2283105022831051) internal successors, (269), 234 states have internal predecessors, (269), 28 states have call successors, (28), 9 states have call predecessors, (28), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:26:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 308 transitions. [2021-12-22 10:26:13,374 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 308 transitions. Word has length 32 [2021-12-22 10:26:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:26:13,376 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 308 transitions. [2021-12-22 10:26:13,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:26:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 308 transitions. [2021-12-22 10:26:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 10:26:13,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:26:13,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:26:13,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:26:13,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:26:13,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:26:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:26:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1378941963, now seen corresponding path program 1 times [2021-12-22 10:26:13,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:26:13,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338751581] [2021-12-22 10:26:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:26:13,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:26:13,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:26:13,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:26:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 10:26:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:26:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-22 10:26:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:26:13,810 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:26:13,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:26:13,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:26:13,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 10:26:13,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:26:13,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:26:24,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:24,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:24,413 INFO L353 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-22 10:26:24,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 158 [2021-12-22 10:26:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:24,429 INFO L353 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2021-12-22 10:26:24,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 52 [2021-12-22 10:26:26,543 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-22 10:26:26,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 72 [2021-12-22 10:26:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:26:26,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:26:26,552 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-22 10:26:26,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 71 [2021-12-22 10:26:26,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 10:26:28,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-12-22 10:26:29,046 INFO L353 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-12-22 10:26:29,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 23 [2021-12-22 10:26:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:26:29,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:26:29,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:26:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338751581] [2021-12-22 10:26:29,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338751581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:26:29,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:26:29,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 10:26:29,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758899319] [2021-12-22 10:26:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:26:29,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:26:29,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:26:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:26:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=105, Unknown=5, NotChecked=0, Total=132 [2021-12-22 10:26:29,112 INFO L87 Difference]: Start difference. First operand 255 states and 308 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)