./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-2.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 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 07:54:14,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 07:54:14,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 07:54:14,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 07:54:14,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 07:54:14,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 07:54:14,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 07:54:14,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 07:54:14,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 07:54:14,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 07:54:14,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 07:54:14,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 07:54:14,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 07:54:14,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 07:54:14,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 07:54:14,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 07:54:14,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 07:54:14,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 07:54:14,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 07:54:14,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 07:54:14,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 07:54:14,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 07:54:14,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 07:54:14,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 07:54:14,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 07:54:14,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 07:54:14,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 07:54:14,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 07:54:14,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 07:54:14,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 07:54:14,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 07:54:14,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 07:54:14,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 07:54:14,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 07:54:14,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 07:54:14,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 07:54:14,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 07:54:14,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 07:54:14,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 07:54:14,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 07:54:14,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 07:54:14,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 07:54:14,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 07:54:14,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 07:54:14,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 07:54:14,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 07:54:14,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 07:54:14,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 07:54:14,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 07:54:14,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 07:54:14,281 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 07:54:14,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 07:54:14,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 07:54:14,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 07:54:14,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 07:54:14,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 07:54:14,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 07:54:14,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 07:54:14,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 07:54:14,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 07:54:14,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:54:14,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 07:54:14,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 07:54:14,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 07:54:14,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 07:54:14,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 07:54:14,286 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 07:54:14,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 07:54:14,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 07:54:14,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 07:54:14,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 [2021-12-17 07:54:14,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 07:54:14,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 07:54:14,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 07:54:14,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 07:54:14,487 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 07:54:14,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2021-12-17 07:54:14,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10650403f/06f710b097a94e439a2e6fb916fe95aa/FLAG22b8f41bc [2021-12-17 07:54:14,971 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 07:54:14,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2021-12-17 07:54:14,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10650403f/06f710b097a94e439a2e6fb916fe95aa/FLAG22b8f41bc [2021-12-17 07:54:14,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10650403f/06f710b097a94e439a2e6fb916fe95aa [2021-12-17 07:54:14,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 07:54:14,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 07:54:14,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 07:54:14,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 07:54:14,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 07:54:14,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:54:14" (1/1) ... [2021-12-17 07:54:15,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d92ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15, skipping insertion in model container [2021-12-17 07:54:15,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:54:14" (1/1) ... [2021-12-17 07:54:15,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 07:54:15,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 07:54:15,298 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-2.i[33822,33835] [2021-12-17 07:54:15,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:54:15,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 07:54:15,367 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-2.i[33822,33835] [2021-12-17 07:54:15,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:54:15,407 INFO L208 MainTranslator]: Completed translation [2021-12-17 07:54:15,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15 WrapperNode [2021-12-17 07:54:15,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 07:54:15,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 07:54:15,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 07:54:15,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 07:54:15,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,442 INFO L137 Inliner]: procedures = 232, calls = 75, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 116 [2021-12-17 07:54:15,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 07:54:15,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 07:54:15,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 07:54:15,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 07:54:15,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 07:54:15,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 07:54:15,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 07:54:15,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 07:54:15,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (1/1) ... [2021-12-17 07:54:15,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:54:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:54:15,536 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) [2021-12-17 07:54:15,548 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 [2021-12-17 07:54:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 07:54:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2021-12-17 07:54:15,575 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2021-12-17 07:54:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 07:54:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 07:54:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2021-12-17 07:54:15,575 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2021-12-17 07:54:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 07:54:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-17 07:54:15,576 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-17 07:54:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 07:54:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 07:54:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 07:54:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 07:54:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-17 07:54:15,576 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-17 07:54:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 07:54:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 07:54:15,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 07:54:15,726 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 07:54:15,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 07:54:16,038 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 07:54:16,048 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 07:54:16,048 INFO L301 CfgBuilder]: Removed 41 assume(true) statements. [2021-12-17 07:54:16,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:54:16 BoogieIcfgContainer [2021-12-17 07:54:16,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 07:54:16,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 07:54:16,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 07:54:16,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 07:54:16,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:54:14" (1/3) ... [2021-12-17 07:54:16,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7184c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:54:16, skipping insertion in model container [2021-12-17 07:54:16,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:15" (2/3) ... [2021-12-17 07:54:16,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7184c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:54:16, skipping insertion in model container [2021-12-17 07:54:16,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:54:16" (3/3) ... [2021-12-17 07:54:16,060 INFO L111 eAbstractionObserver]: Analyzing ICFG bubble_sort_linux-2.i [2021-12-17 07:54:16,066 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 07:54:16,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 07:54:16,097 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 07:54:16,101 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 [2021-12-17 07:54:16,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 07:54:16,115 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) [2021-12-17 07:54:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 07:54:16,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:16,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:16,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1761516263, now seen corresponding path program 1 times [2021-12-17 07:54:16,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:16,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156284417] [2021-12-17 07:54:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:16,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:16,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156284417] [2021-12-17 07:54:16,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156284417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:16,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:16,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 07:54:16,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599322872] [2021-12-17 07:54:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:16,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 07:54:16,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 07:54:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 07:54:16,254 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) [2021-12-17 07:54:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:16,278 INFO L93 Difference]: Finished difference Result 230 states and 397 transitions. [2021-12-17 07:54:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 07:54:16,280 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 [2021-12-17 07:54:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:16,285 INFO L225 Difference]: With dead ends: 230 [2021-12-17 07:54:16,285 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 07:54:16,288 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 [2021-12-17 07:54:16,297 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 [2021-12-17 07:54:16,298 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] [2021-12-17 07:54:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 07:54:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-17 07:54:16,323 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) [2021-12-17 07:54:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2021-12-17 07:54:16,334 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 9 [2021-12-17 07:54:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:16,334 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2021-12-17 07:54:16,334 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) [2021-12-17 07:54:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2021-12-17 07:54:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 07:54:16,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:16,336 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] [2021-12-17 07:54:16,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 07:54:16,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash 849043181, now seen corresponding path program 1 times [2021-12-17 07:54:16,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:16,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093690447] [2021-12-17 07:54:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:16,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:16,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093690447] [2021-12-17 07:54:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093690447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:16,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:16,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 07:54:16,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379902057] [2021-12-17 07:54:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:16,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 07:54:16,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 07:54:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 07:54:16,531 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) [2021-12-17 07:54:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:16,789 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-12-17 07:54:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 07:54:16,790 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 [2021-12-17 07:54:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:16,796 INFO L225 Difference]: With dead ends: 109 [2021-12-17 07:54:16,796 INFO L226 Difference]: Without dead ends: 106 [2021-12-17 07:54:16,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 07:54:16,800 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 [2021-12-17 07:54:16,801 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] [2021-12-17 07:54:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-17 07:54:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-17 07:54:16,813 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) [2021-12-17 07:54:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2021-12-17 07:54:16,814 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 21 [2021-12-17 07:54:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:16,815 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2021-12-17 07:54:16,815 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) [2021-12-17 07:54:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2021-12-17 07:54:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 07:54:16,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:16,816 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] [2021-12-17 07:54:16,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 07:54:16,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash 502050183, now seen corresponding path program 1 times [2021-12-17 07:54:16,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:16,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959901450] [2021-12-17 07:54:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:16,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:17,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:17,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959901450] [2021-12-17 07:54:17,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959901450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:17,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:17,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 07:54:17,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406239389] [2021-12-17 07:54:17,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:17,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 07:54:17,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 07:54:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-17 07:54:17,066 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) [2021-12-17 07:54:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:17,637 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2021-12-17 07:54:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 07:54:17,638 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 [2021-12-17 07:54:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:17,639 INFO L225 Difference]: With dead ends: 196 [2021-12-17 07:54:17,639 INFO L226 Difference]: Without dead ends: 190 [2021-12-17 07:54:17,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-17 07:54:17,640 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 520 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:17,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 250 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 07:54:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-17 07:54:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 172. [2021-12-17 07:54:17,651 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) [2021-12-17 07:54:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2021-12-17 07:54:17,653 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 24 [2021-12-17 07:54:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:17,653 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2021-12-17 07:54:17,653 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) [2021-12-17 07:54:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2021-12-17 07:54:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 07:54:17,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:17,654 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] [2021-12-17 07:54:17,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 07:54:17,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1234303898, now seen corresponding path program 1 times [2021-12-17 07:54:17,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814827336] [2021-12-17 07:54:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:17,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:17,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814827336] [2021-12-17 07:54:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814827336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:17,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:17,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 07:54:17,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259714651] [2021-12-17 07:54:17,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:17,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 07:54:17,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 07:54:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 07:54:17,919 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) [2021-12-17 07:54:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:18,510 INFO L93 Difference]: Finished difference Result 274 states and 329 transitions. [2021-12-17 07:54:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 07:54:18,510 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 [2021-12-17 07:54:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:18,511 INFO L225 Difference]: With dead ends: 274 [2021-12-17 07:54:18,512 INFO L226 Difference]: Without dead ends: 271 [2021-12-17 07:54:18,512 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 [2021-12-17 07:54:18,513 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 301 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:18,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 308 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 07:54:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-17 07:54:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 253. [2021-12-17 07:54:18,524 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) [2021-12-17 07:54:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 309 transitions. [2021-12-17 07:54:18,525 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 309 transitions. Word has length 27 [2021-12-17 07:54:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:18,526 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 309 transitions. [2021-12-17 07:54:18,526 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) [2021-12-17 07:54:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 309 transitions. [2021-12-17 07:54:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 07:54:18,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:18,527 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] [2021-12-17 07:54:18,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 07:54:18,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1680148119, now seen corresponding path program 1 times [2021-12-17 07:54:18,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121439575] [2021-12-17 07:54:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:18,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:18,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121439575] [2021-12-17 07:54:18,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121439575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:18,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:18,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 07:54:18,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617432605] [2021-12-17 07:54:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:18,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 07:54:18,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 07:54:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 07:54:18,891 INFO L87 Difference]: Start difference. First operand 253 states and 309 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 10 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) [2021-12-17 07:54:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:19,737 INFO L93 Difference]: Finished difference Result 273 states and 327 transitions. [2021-12-17 07:54:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 07:54:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 10 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 [2021-12-17 07:54:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:19,739 INFO L225 Difference]: With dead ends: 273 [2021-12-17 07:54:19,739 INFO L226 Difference]: Without dead ends: 270 [2021-12-17 07:54:19,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-17 07:54:19,741 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 347 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:19,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 320 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 07:54:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-17 07:54:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 253. [2021-12-17 07:54:19,754 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) [2021-12-17 07:54:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 308 transitions. [2021-12-17 07:54:19,756 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 308 transitions. Word has length 30 [2021-12-17 07:54:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 308 transitions. [2021-12-17 07:54:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 10 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) [2021-12-17 07:54:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 308 transitions. [2021-12-17 07:54:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 07:54:19,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:19,758 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] [2021-12-17 07:54:19,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 07:54:19,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash -493122043, now seen corresponding path program 1 times [2021-12-17 07:54:19,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:19,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989611649] [2021-12-17 07:54:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:19,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:20,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:20,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:20,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989611649] [2021-12-17 07:54:20,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989611649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:20,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:20,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-17 07:54:20,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067641245] [2021-12-17 07:54:20,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:20,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 07:54:20,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 07:54:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-17 07:54:20,666 INFO L87 Difference]: Start difference. First operand 253 states and 308 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 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) [2021-12-17 07:54:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:22,018 INFO L93 Difference]: Finished difference Result 272 states and 325 transitions. [2021-12-17 07:54:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 07:54:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 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 [2021-12-17 07:54:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:22,021 INFO L225 Difference]: With dead ends: 272 [2021-12-17 07:54:22,021 INFO L226 Difference]: Without dead ends: 269 [2021-12-17 07:54:22,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-12-17 07:54:22,022 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 320 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:22,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 415 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 07:54:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-17 07:54:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 253. [2021-12-17 07:54:22,033 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) [2021-12-17 07:54:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 307 transitions. [2021-12-17 07:54:22,034 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 307 transitions. Word has length 33 [2021-12-17 07:54:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:22,035 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 307 transitions. [2021-12-17 07:54:22,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 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) [2021-12-17 07:54:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 307 transitions. [2021-12-17 07:54:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 07:54:22,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:22,036 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] [2021-12-17 07:54:22,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 07:54:22,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2033122620, now seen corresponding path program 1 times [2021-12-17 07:54:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932615892] [2021-12-17 07:54:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:22,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:22,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:22,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:22,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932615892] [2021-12-17 07:54:22,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932615892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:22,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:22,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 07:54:22,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074568979] [2021-12-17 07:54:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:22,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 07:54:22,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 07:54:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-17 07:54:22,343 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) [2021-12-17 07:54:23,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:23,106 INFO L93 Difference]: Finished difference Result 271 states and 323 transitions. [2021-12-17 07:54:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 07:54:23,106 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 [2021-12-17 07:54:23,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:23,107 INFO L225 Difference]: With dead ends: 271 [2021-12-17 07:54:23,108 INFO L226 Difference]: Without dead ends: 268 [2021-12-17 07:54:23,108 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 [2021-12-17 07:54:23,108 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 [2021-12-17 07:54:23,109 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] [2021-12-17 07:54:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-17 07:54:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 253. [2021-12-17 07:54:23,118 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) [2021-12-17 07:54:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 306 transitions. [2021-12-17 07:54:23,119 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 306 transitions. Word has length 36 [2021-12-17 07:54:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:23,120 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 306 transitions. [2021-12-17 07:54:23,120 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) [2021-12-17 07:54:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 306 transitions. [2021-12-17 07:54:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 07:54:23,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:23,124 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] [2021-12-17 07:54:23,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 07:54:23,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1335339115, now seen corresponding path program 1 times [2021-12-17 07:54:23,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:23,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817804713] [2021-12-17 07:54:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:23,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:23,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817804713] [2021-12-17 07:54:23,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817804713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:23,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:23,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 07:54:23,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768568966] [2021-12-17 07:54:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:23,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 07:54:23,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 07:54:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-17 07:54:23,417 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) [2021-12-17 07:54:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:24,154 INFO L93 Difference]: Finished difference Result 270 states and 321 transitions. [2021-12-17 07:54:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 07:54:24,154 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 [2021-12-17 07:54:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:24,155 INFO L225 Difference]: With dead ends: 270 [2021-12-17 07:54:24,155 INFO L226 Difference]: Without dead ends: 267 [2021-12-17 07:54:24,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-12-17 07:54:24,156 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 526 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:24,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 322 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 07:54:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-17 07:54:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 253. [2021-12-17 07:54:24,167 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) [2021-12-17 07:54:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2021-12-17 07:54:24,168 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 39 [2021-12-17 07:54:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:24,170 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2021-12-17 07:54:24,170 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) [2021-12-17 07:54:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2021-12-17 07:54:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 07:54:24,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:24,173 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] [2021-12-17 07:54:24,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 07:54:24,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1154705564, now seen corresponding path program 1 times [2021-12-17 07:54:24,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:24,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810402092] [2021-12-17 07:54:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:24,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:24,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 07:54:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 07:54:24,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810402092] [2021-12-17 07:54:24,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810402092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635937354] [2021-12-17 07:54:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:24,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 07:54:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:54:24,556 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) [2021-12-17 07:54:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 07:54:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-17 07:54:24,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:54:24,797 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 07:54:24,797 INFO L388 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 [2021-12-17 07:54:24,848 INFO L388 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 [2021-12-17 07:54:24,853 INFO L388 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 [2021-12-17 07:54:24,879 INFO L388 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 [2021-12-17 07:54:24,883 INFO L388 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 [2021-12-17 07:54:25,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:25,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 44 [2021-12-17 07:54:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:25,046 INFO L388 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 35 treesize of output 30 [2021-12-17 07:54:25,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:25,051 INFO L388 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 25 treesize of output 27 [2021-12-17 07:54:25,053 INFO L388 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 21 treesize of output 13 [2021-12-17 07:54:25,088 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 07:54:25,089 INFO L388 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 [2021-12-17 07:54:25,144 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 07:54:25,144 INFO L388 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 [2021-12-17 07:54:25,171 INFO L388 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 17 treesize of output 19 [2021-12-17 07:54:25,182 INFO L388 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 10 treesize of output 4 [2021-12-17 07:54:25,320 INFO L354 Elim1Store]: treesize reduction 46, result has 39.5 percent of original size [2021-12-17 07:54:25,321 INFO L388 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 66 [2021-12-17 07:54:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:25,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 07:54:25,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-17 07:54:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:25,421 INFO L354 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2021-12-17 07:54:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 57 [2021-12-17 07:54:25,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 07:54:25,534 INFO L388 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 29 treesize of output 33 [2021-12-17 07:54:25,577 INFO L388 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 26 treesize of output 18 [2021-12-17 07:54:25,616 INFO L388 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 17 treesize of output 19 [2021-12-17 07:54:25,730 INFO L388 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 16 treesize of output 8 [2021-12-17 07:54:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:25,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 07:54:25,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1000 (Array Int Int))) (not (= |c_~#gl_list~0.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1000) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4))))) is different from false [2021-12-17 07:54:25,929 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_list_add___list_add_~next#1.offset_5| Int) (|v_list_add___list_add_~next#1.base_5| Int) (v_ArrVal_1017 (Array Int Int)) (v_ArrVal_1016 (Array Int Int)) (v_ArrVal_1015 (Array Int Int)) (v_ArrVal_1000 (Array Int Int)) (v_ArrVal_1018 Int)) (not (= |c_~#gl_list~0.base| (select (select (store (store (store (store |c_#memory_$Pointer$.base| |v_list_add___list_add_~next#1.base_5| v_ArrVal_1016) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1017) |c_~#gl_list~0.base| (store (select (store (store |c_#memory_$Pointer$.base| |v_list_add___list_add_~next#1.base_5| (store (select |c_#memory_$Pointer$.base| |v_list_add___list_add_~next#1.base_5|) (+ |v_list_add___list_add_~next#1.offset_5| 4) |c_ULTIMATE.start_gl_insert_~node~1#1.base|)) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1015) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset| v_ArrVal_1018)) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1000) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4))))) is different from false [2021-12-17 07:54:25,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635937354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:25,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 07:54:25,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-12-17 07:54:25,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800758505] [2021-12-17 07:54:25,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 07:54:25,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 07:54:25,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:25,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 07:54:25,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=551, Unknown=21, NotChecked=98, Total=756 [2021-12-17 07:54:25,932 INFO L87 Difference]: Start difference. First operand 253 states and 305 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 07:54:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:27,216 INFO L93 Difference]: Finished difference Result 373 states and 440 transitions. [2021-12-17 07:54:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 07:54:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2021-12-17 07:54:27,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:27,218 INFO L225 Difference]: With dead ends: 373 [2021-12-17 07:54:27,219 INFO L226 Difference]: Without dead ends: 370 [2021-12-17 07:54:27,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1210, Unknown=39, NotChecked=150, Total=1640 [2021-12-17 07:54:27,220 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 806 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:27,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 587 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1430 Invalid, 0 Unknown, 541 Unchecked, 0.7s Time] [2021-12-17 07:54:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-12-17 07:54:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 342. [2021-12-17 07:54:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 298 states have (on average 1.2181208053691275) internal successors, (363), 314 states have internal predecessors, (363), 33 states have call successors, (33), 12 states have call predecessors, (33), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 07:54:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 411 transitions. [2021-12-17 07:54:27,234 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 411 transitions. Word has length 40 [2021-12-17 07:54:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:27,234 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 411 transitions. [2021-12-17 07:54:27,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 07:54:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 411 transitions. [2021-12-17 07:54:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 07:54:27,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:27,235 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, 1, 1, 1] [2021-12-17 07:54:27,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 07:54:27,451 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 [2021-12-17 07:54:27,452 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:27,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1293265745, now seen corresponding path program 1 times [2021-12-17 07:54:27,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:27,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107971236] [2021-12-17 07:54:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:27,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:27,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:28,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107971236] [2021-12-17 07:54:28,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107971236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:28,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:28,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-17 07:54:28,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887356298] [2021-12-17 07:54:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:28,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 07:54:28,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 07:54:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-17 07:54:28,090 INFO L87 Difference]: Start difference. First operand 342 states and 411 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-12-17 07:54:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:29,313 INFO L93 Difference]: Finished difference Result 355 states and 422 transitions. [2021-12-17 07:54:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 07:54:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 11 states have internal predecessors, (38), 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 42 [2021-12-17 07:54:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:29,315 INFO L225 Difference]: With dead ends: 355 [2021-12-17 07:54:29,315 INFO L226 Difference]: Without dead ends: 352 [2021-12-17 07:54:29,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-12-17 07:54:29,316 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 483 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:29,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 340 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 07:54:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-17 07:54:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2021-12-17 07:54:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 298 states have (on average 1.2147651006711409) internal successors, (362), 314 states have internal predecessors, (362), 33 states have call successors, (33), 12 states have call predecessors, (33), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 07:54:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 410 transitions. [2021-12-17 07:54:29,332 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 410 transitions. Word has length 42 [2021-12-17 07:54:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:29,332 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 410 transitions. [2021-12-17 07:54:29,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-12-17 07:54:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 410 transitions. [2021-12-17 07:54:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 07:54:29,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:29,333 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, 1, 1, 1] [2021-12-17 07:54:29,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 07:54:29,333 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1188127317, now seen corresponding path program 1 times [2021-12-17 07:54:29,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:29,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135353816] [2021-12-17 07:54:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:29,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:29,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 07:54:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 07:54:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 07:54:29,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135353816] [2021-12-17 07:54:29,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135353816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028920349] [2021-12-17 07:54:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:29,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 07:54:29,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:54:29,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 07:54:29,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 07:54:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 121 conjunts are in the unsatisfiable core [2021-12-17 07:54:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:54:29,905 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 07:54:29,906 INFO L388 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 07:54:29,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 21 [2021-12-17 07:54:29,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 16 [2021-12-17 07:54:29,960 INFO L388 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 [2021-12-17 07:54:29,964 INFO L388 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 [2021-12-17 07:54:30,098 INFO L354 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2021-12-17 07:54:30,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 46 [2021-12-17 07:54:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:30,110 INFO L388 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 [2021-12-17 07:54:30,115 INFO L388 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 32 treesize of output 20 [2021-12-17 07:54:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2021-12-17 07:54:30,163 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 07:54:30,163 INFO L388 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 46 treesize of output 43 [2021-12-17 07:54:30,251 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 07:54:30,251 INFO L388 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 [2021-12-17 07:54:30,297 INFO L388 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 40 treesize of output 36 [2021-12-17 07:54:30,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:30,319 INFO L388 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 34 treesize of output 12 [2021-12-17 07:54:30,478 INFO L354 Elim1Store]: treesize reduction 61, result has 19.7 percent of original size [2021-12-17 07:54:30,478 INFO L388 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 76 treesize of output 73 [2021-12-17 07:54:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:30,491 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 07:54:30,491 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 60 [2021-12-17 07:54:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:30,502 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-17 07:54:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2021-12-17 07:54:30,551 INFO L388 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 27 treesize of output 27 [2021-12-17 07:54:30,710 INFO L388 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 24 treesize of output 12 [2021-12-17 07:54:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:30,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 07:54:30,794 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1442) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4))))) is different from false [2021-12-17 07:54:30,911 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1458 (Array Int Int)) (v_ArrVal_1457 (Array Int Int)) (|v_list_add___list_add_~next#1.offset_8| Int) (v_ArrVal_1456 (Array Int Int)) (v_ArrVal_1442 (Array Int Int)) (|v_list_add___list_add_~prev#1.offset_8| Int) (v_ArrVal_1459 Int)) (or (< |c_~#gl_list~0.offset| |v_list_add___list_add_~prev#1.offset_8|) (not (= 0 (select (select (store (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1458) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1456) |c_~#gl_list~0.base| (store (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |v_list_add___list_add_~next#1.offset_8| 4) |c_ULTIMATE.start_gl_insert_~node~1#1.base|)) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1457) |c_~#gl_list~0.base|) |v_list_add___list_add_~prev#1.offset_8| v_ArrVal_1459))) |c_ULTIMATE.start_gl_insert_~node~1#1.base| v_ArrVal_1442) |c_~#gl_list~0.base|) (+ |c_~#gl_list~0.offset| 4)))))) is different from false [2021-12-17 07:54:30,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028920349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:30,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 07:54:30,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-12-17 07:54:30,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570752435] [2021-12-17 07:54:30,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 07:54:30,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 07:54:30,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 07:54:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=642, Unknown=21, NotChecked=106, Total=870 [2021-12-17 07:54:30,914 INFO L87 Difference]: Start difference. First operand 342 states and 410 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 17 states have internal predecessors, (68), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 07:54:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:32,302 INFO L93 Difference]: Finished difference Result 371 states and 436 transitions. [2021-12-17 07:54:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 07:54:32,302 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 17 states have internal predecessors, (68), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-12-17 07:54:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:32,303 INFO L225 Difference]: With dead ends: 371 [2021-12-17 07:54:32,303 INFO L226 Difference]: Without dead ends: 368 [2021-12-17 07:54:32,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1497, Unknown=36, NotChecked=166, Total=1980 [2021-12-17 07:54:32,304 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1194 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:32,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 599 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1646 Invalid, 0 Unknown, 240 Unchecked, 0.9s Time] [2021-12-17 07:54:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-17 07:54:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 342. [2021-12-17 07:54:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 298 states have (on average 1.2114093959731544) internal successors, (361), 314 states have internal predecessors, (361), 33 states have call successors, (33), 12 states have call predecessors, (33), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 07:54:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 409 transitions. [2021-12-17 07:54:32,319 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 409 transitions. Word has length 43 [2021-12-17 07:54:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:32,319 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 409 transitions. [2021-12-17 07:54:32,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 17 states have internal predecessors, (68), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 07:54:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 409 transitions. [2021-12-17 07:54:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 07:54:32,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:32,320 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, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:32,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 07:54:32,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 07:54:32,532 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2001574846, now seen corresponding path program 1 times [2021-12-17 07:54:32,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:32,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910981869] [2021-12-17 07:54:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:32,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 07:54:32,558 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 07:54:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 07:54:32,593 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 07:54:32,594 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 07:54:32,594 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 07:54:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 07:54:32,597 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:32,599 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 07:54:32,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 07:54:32 BoogieIcfgContainer [2021-12-17 07:54:32,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 07:54:32,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 07:54:32,649 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 07:54:32,649 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 07:54:32,649 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:54:16" (3/4) ... [2021-12-17 07:54:32,650 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 07:54:32,680 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 07:54:32,680 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 07:54:32,681 INFO L158 Benchmark]: Toolchain (without parser) took 17686.33ms. Allocated memory was 96.5MB in the beginning and 285.2MB in the end (delta: 188.7MB). Free memory was 64.2MB in the beginning and 118.6MB in the end (delta: -54.4MB). Peak memory consumption was 134.3MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,681 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:54:32,681 INFO L158 Benchmark]: CACSL2BoogieTranslator took 410.89ms. Allocated memory is still 96.5MB. Free memory was 64.0MB in the beginning and 55.3MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,682 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.62ms. Allocated memory is still 96.5MB. Free memory was 55.3MB in the beginning and 52.9MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,682 INFO L158 Benchmark]: Boogie Preprocessor took 44.08ms. Allocated memory is still 96.5MB. Free memory was 52.9MB in the beginning and 50.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,683 INFO L158 Benchmark]: RCFGBuilder took 556.00ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 50.2MB in the beginning and 80.8MB in the end (delta: -30.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,683 INFO L158 Benchmark]: TraceAbstraction took 16596.94ms. Allocated memory was 123.7MB in the beginning and 285.2MB in the end (delta: 161.5MB). Free memory was 80.8MB in the beginning and 121.7MB in the end (delta: -41.0MB). Peak memory consumption was 120.2MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,683 INFO L158 Benchmark]: Witness Printer took 32.20ms. Allocated memory is still 285.2MB. Free memory was 121.7MB in the beginning and 118.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 07:54:32,684 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 96.5MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 410.89ms. Allocated memory is still 96.5MB. Free memory was 64.0MB in the beginning and 55.3MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.62ms. Allocated memory is still 96.5MB. Free memory was 55.3MB in the beginning and 52.9MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.08ms. Allocated memory is still 96.5MB. Free memory was 52.9MB in the beginning and 50.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 556.00ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 50.2MB in the beginning and 80.8MB in the end (delta: -30.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 16596.94ms. Allocated memory was 123.7MB in the beginning and 285.2MB in the end (delta: 161.5MB). Free memory was 80.8MB in the beginning and 121.7MB in the end (delta: -41.0MB). Peak memory consumption was 120.2MB. Max. memory is 16.1GB. * Witness Printer took 32.20ms. Allocated memory is still 285.2MB. Free memory was 121.7MB in the beginning and 118.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 840]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L850] struct list_head gl_list = { &(gl_list), &(gl_list) }; VAL [gl_list={3:0}] [L949] CALL gl_read() [L909] CALL gl_insert(__VERIFIER_nondet_int()) [L899] struct node *node = malloc(sizeof *node); [L900] COND FALSE !(!node) VAL [\old(value)=-1, gl_list={3:0}, node={5:0}, value=-1] [L902] node->value = value VAL [\old(value)=-1, gl_list={3:0}, node={5:0}, value=-1] [L903] CALL list_add(&node->linkage, &gl_list) VAL [gl_list={3:0}] [L890] EXPR head->next [L890] CALL __list_add(new, head, head->next) [L878] next->prev = new [L879] new->next = next [L880] new->prev = prev [L881] prev->next = new VAL [gl_list={3:0}, new={5:4}, new={5:4}, next={3:0}, next={3:0}, prev={3:0}, prev={3:0}] [L890] RET __list_add(new, head, head->next) [L903] RET list_add(&node->linkage, &gl_list) VAL [\old(value)=-1, gl_list={3:0}, node={5:0}, value=-1] [L904] (&node->nested)->next = (&node->nested) [L904] (&node->nested)->next = (&node->nested) VAL [\old(value)=-1, gl_list={3:0}, node={5:0}, value=-1] [L909] RET gl_insert(__VERIFIER_nondet_int()) [L911] COND FALSE !(__VERIFIER_nondet_int()) [L949] RET gl_read() [L950] CALL inspect(&gl_list) VAL [gl_list={3:0}, head={3:0}] [L853] COND FALSE !(!(head)) VAL [gl_list={3:0}, head={3:0}, head={3:0}] [L854] EXPR head->next VAL [gl_list={3:0}, head={3:0}, head={3:0}, head->next={5:4}] [L854] COND FALSE !(!(head->next != head)) [L855] EXPR head->prev VAL [gl_list={3:0}, head={3:0}, head={3:0}, head->prev={5:4}] [L855] COND FALSE !(!(head->prev != head)) [L856] EXPR head->prev [L856] head = head->prev [L857] COND FALSE !(!(head)) VAL [gl_list={3:0}, head={3:0}, head={5:4}] [L858] EXPR head->next VAL [gl_list={3:0}, head={5:4}, head={3:0}, head->next={3:0}] [L858] COND FALSE !(!(head->next != head)) [L859] EXPR head->prev VAL [gl_list={3:0}, head={5:4}, head={3:0}, head->prev={3:0}] [L859] COND FALSE !(!(head->prev != head)) [L860] const struct node *node = ((struct node *)((char *)(head)-(unsigned long)(&((struct node *)0)->linkage))); VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}] [L861] COND FALSE !(!(node)) VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}] [L862] EXPR node->nested.next VAL [gl_list={3:0}, head={5:4}, head={3:0}, node={5:0}, node->nested.next={5:12}] [L862] COND FALSE !(!(node->nested.next == &node->nested)) [L863] EXPR node->nested.prev VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}, node->nested.prev={52:53}] [L863] COND TRUE !(node->nested.prev == &node->nested) [L863] CALL fail() VAL [gl_list={3:0}] [L840] reach_error() VAL [gl_list={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 118 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.5s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5075 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5044 mSDsluCounter, 3849 SdHoareTripleChecker+Invalid, 5.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 781 IncrementalHoareTripleChecker+Unchecked, 2808 mSDsCounter, 1026 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9940 IncrementalHoareTripleChecker+Invalid, 11747 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1026 mSolverCounterUnsat, 1041 mSDtfsCounter, 9940 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 351 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 227 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=342occurred in iteration=9, InterpolantAutomatonStates: 157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 162 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 414 ConstructedInterpolants, 12 QuantifiedInterpolants, 16843 SizeOfPredicates, 69 NumberOfNonLiveVariables, 838 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 2/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-17 07:54:32,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE