./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:35:30,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:35:30,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:35:30,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:35:30,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:35:30,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:35:30,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:35:30,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:35:30,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:35:30,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:35:30,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:35:30,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:35:30,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:35:30,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:35:30,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:35:30,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:35:30,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:35:30,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:35:30,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:35:30,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:35:30,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:35:30,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:35:30,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:35:30,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:35:30,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:35:30,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:35:30,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:35:30,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:35:30,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:35:30,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:35:30,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:35:30,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:35:30,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:35:30,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:35:30,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:35:30,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:35:30,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:35:30,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:35:30,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:35:30,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:35:30,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:35:30,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:35:30,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:35:30,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:35:30,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:35:30,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:35:30,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:35:30,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:35:30,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:35:30,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:35:30,492 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:35:30,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:35:30,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:35:30,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:35:30,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:35:30,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:35:30,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:35:30,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:35:30,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:35:30,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:35:30,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:35:30,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:35:30,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:35:30,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:35:30,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:35:30,496 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:35:30,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:35:30,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:35:30,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:35:30,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2021-12-22 10:35:30,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:35:30,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:35:30,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:35:30,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:35:30,707 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:35:30,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2021-12-22 10:35:30,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e5d3b24f/4a3420c3e5da40b3b7e550d6235b78c9/FLAGf98888482 [2021-12-22 10:35:31,102 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:35:31,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2021-12-22 10:35:31,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e5d3b24f/4a3420c3e5da40b3b7e550d6235b78c9/FLAGf98888482 [2021-12-22 10:35:31,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e5d3b24f/4a3420c3e5da40b3b7e550d6235b78c9 [2021-12-22 10:35:31,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:35:31,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:35:31,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:35:31,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:35:31,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:35:31,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277790a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31, skipping insertion in model container [2021-12-22 10:35:31,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:35:31,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:35:31,796 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/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2021-12-22 10:35:31,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:35:31,812 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:35:31,848 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/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2021-12-22 10:35:31,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:35:31,867 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:35:31,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31 WrapperNode [2021-12-22 10:35:31,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:35:31,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:35:31,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:35:31,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:35:31,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,902 INFO L137 Inliner]: procedures = 129, calls = 39, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 179 [2021-12-22 10:35:31,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:35:31,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:35:31,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:35:31,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:35:31,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:35:31,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:35:31,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:35:31,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:35:31,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (1/1) ... [2021-12-22 10:35:31,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:35:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:31,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:35:31,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:35:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-22 10:35:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-22 10:35:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:35:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:35:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 10:35:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 10:35:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 10:35:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:35:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 10:35:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:35:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:35:32,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:35:32,101 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:35:32,103 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:35:32,134 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-22 10:35:32,318 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:35:32,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:35:32,336 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-22 10:35:32,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:35:32 BoogieIcfgContainer [2021-12-22 10:35:32,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:35:32,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:35:32,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:35:32,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:35:32,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:35:31" (1/3) ... [2021-12-22 10:35:32,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c662013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:35:32, skipping insertion in model container [2021-12-22 10:35:32,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:31" (2/3) ... [2021-12-22 10:35:32,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c662013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:35:32, skipping insertion in model container [2021-12-22 10:35:32,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:35:32" (3/3) ... [2021-12-22 10:35:32,343 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2021-12-22 10:35:32,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:35:32,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:35:32,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:35:32,378 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:35:32,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:35:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 44 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 10:35:32,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:32,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:32,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2121336049, now seen corresponding path program 1 times [2021-12-22 10:35:32,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98553832] [2021-12-22 10:35:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:32,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:32,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:32,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98553832] [2021-12-22 10:35:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98553832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:32,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:32,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:35:32,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542292728] [2021-12-22 10:35:32,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:32,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:35:32,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:35:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:35:32,527 INFO L87 Difference]: Start difference. First operand has 46 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 44 states have internal predecessors, (69), 2 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:32,540 INFO L93 Difference]: Finished difference Result 90 states and 140 transitions. [2021-12-22 10:35:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:35:32,541 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 10:35:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:32,546 INFO L225 Difference]: With dead ends: 90 [2021-12-22 10:35:32,546 INFO L226 Difference]: Without dead ends: 34 [2021-12-22 10:35:32,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:35:32,550 INFO L933 BasicCegarLoop]: 61 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, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:32,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-22 10:35:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-22 10:35:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-12-22 10:35:32,570 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 7 [2021-12-22 10:35:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-12-22 10:35:32,570 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-12-22 10:35:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 10:35:32,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:32,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:32,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:35:32,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2100673088, now seen corresponding path program 1 times [2021-12-22 10:35:32,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15873101] [2021-12-22 10:35:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:32,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:32,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15873101] [2021-12-22 10:35:32,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15873101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:32,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:32,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:35:32,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166675294] [2021-12-22 10:35:32,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:32,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:35:32,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:35:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:32,619 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:32,654 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-12-22 10:35:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:35:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 10:35:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:32,656 INFO L225 Difference]: With dead ends: 62 [2021-12-22 10:35:32,656 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 10:35:32,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:35:32,657 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:32,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 109 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 10:35:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-22 10:35:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-12-22 10:35:32,662 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 7 [2021-12-22 10:35:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:32,662 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-12-22 10:35:32,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-12-22 10:35:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 10:35:32,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:32,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:32,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:35:32,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2103248719, now seen corresponding path program 1 times [2021-12-22 10:35:32,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:32,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275108614] [2021-12-22 10:35:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:32,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:35:32,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275108614] [2021-12-22 10:35:32,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275108614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:32,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:32,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:35:32,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438320845] [2021-12-22 10:35:32,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:32,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:35:32,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:35:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:32,743 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:32,780 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-12-22 10:35:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:35:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-22 10:35:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:32,782 INFO L225 Difference]: With dead ends: 76 [2021-12-22 10:35:32,782 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 10:35:32,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:35:32,783 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:32,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 61 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 10:35:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2021-12-22 10:35:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-12-22 10:35:32,790 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-12-22 10:35:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:32,790 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-12-22 10:35:32,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-12-22 10:35:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 10:35:32,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:32,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:32,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:35:32,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1383485699, now seen corresponding path program 1 times [2021-12-22 10:35:32,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:32,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667121442] [2021-12-22 10:35:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:32,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:32,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667121442] [2021-12-22 10:35:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667121442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623333726] [2021-12-22 10:35:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:32,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:32,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:32,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:35:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 10:35:33,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:33,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:35:33,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623333726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:33,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:35:33,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-12-22 10:35:33,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163700598] [2021-12-22 10:35:33,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:33,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:35:33,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:35:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:35:33,144 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:33,207 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2021-12-22 10:35:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:35:33,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-22 10:35:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:33,210 INFO L225 Difference]: With dead ends: 90 [2021-12-22 10:35:33,210 INFO L226 Difference]: Without dead ends: 56 [2021-12-22 10:35:33,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:35:33,216 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:33,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 105 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-22 10:35:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2021-12-22 10:35:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-12-22 10:35:33,228 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 31 [2021-12-22 10:35:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:33,228 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-12-22 10:35:33,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-12-22 10:35:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 10:35:33,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:33,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:33,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:33,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:33,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash -104664242, now seen corresponding path program 1 times [2021-12-22 10:35:33,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544662490] [2021-12-22 10:35:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:33,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 10:35:33,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544662490] [2021-12-22 10:35:33,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544662490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292090224] [2021-12-22 10:35:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:33,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:33,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:33,560 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) [2021-12-22 10:35:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:35:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 10:35:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:33,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:33,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292090224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:33,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:33,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2021-12-22 10:35:33,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428898466] [2021-12-22 10:35:33,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:33,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 10:35:33,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:33,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 10:35:33,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-22 10:35:33,824 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:34,052 INFO L93 Difference]: Finished difference Result 157 states and 204 transitions. [2021-12-22 10:35:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 10:35:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 10:35:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:34,053 INFO L225 Difference]: With dead ends: 157 [2021-12-22 10:35:34,053 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 10:35:34,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-12-22 10:35:34,054 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 338 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:34,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 274 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:35:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 10:35:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 78. [2021-12-22 10:35:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 77 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-12-22 10:35:34,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 34 [2021-12-22 10:35:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:34,063 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-12-22 10:35:34,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-12-22 10:35:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 10:35:34,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:34,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:34,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:34,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:34,281 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 781583480, now seen corresponding path program 2 times [2021-12-22 10:35:34,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:34,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50812028] [2021-12-22 10:35:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:34,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 10:35:34,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50812028] [2021-12-22 10:35:34,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50812028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224265488] [2021-12-22 10:35:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:35:34,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:34,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:34,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:34,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:35:34,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:35:34,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 10:35:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:34,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:34,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224265488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:34,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:34,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 12 [2021-12-22 10:35:34,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60250394] [2021-12-22 10:35:34,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:35:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:35:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:35:34,594 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:34,900 INFO L93 Difference]: Finished difference Result 217 states and 274 transitions. [2021-12-22 10:35:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 10:35:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 10:35:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:34,902 INFO L225 Difference]: With dead ends: 217 [2021-12-22 10:35:34,902 INFO L226 Difference]: Without dead ends: 176 [2021-12-22 10:35:34,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-12-22 10:35:34,903 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 329 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:34,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 517 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:35:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-22 10:35:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2021-12-22 10:35:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.24) internal successors, (155), 125 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2021-12-22 10:35:34,917 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 45 [2021-12-22 10:35:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:34,917 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2021-12-22 10:35:34,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2021-12-22 10:35:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 10:35:34,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:34,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:34,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:35,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -321691474, now seen corresponding path program 3 times [2021-12-22 10:35:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777914985] [2021-12-22 10:35:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 10:35:35,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777914985] [2021-12-22 10:35:35,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777914985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043588056] [2021-12-22 10:35:35,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:35:35,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:35,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:35,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:35:35,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-22 10:35:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-22 10:35:35,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:35,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:35:35,616 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:35:35,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:35:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:35,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:35:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:35,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:35:35,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2021-12-22 10:35:35,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2021-12-22 10:35:35,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-22 10:35:35,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-12-22 10:35:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:35:36,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:36,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:36,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 40 [2021-12-22 10:35:36,392 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 10:35:36,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-12-22 10:35:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 10:35:36,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:36,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:36,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 14040 treesize of output 12624 [2021-12-22 10:35:39,190 INFO L353 Elim1Store]: treesize reduction 919, result has 37.3 percent of original size [2021-12-22 10:35:39,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 17 new quantified variables, introduced 120 case distinctions, treesize of input 182397 treesize of output 171092 [2021-12-22 10:35:42,582 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-22 10:35:42,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:35:42,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-22 10:35:42,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789723779] [2021-12-22 10:35:42,582 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:35:42,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:35:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-12-22 10:35:42,584 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:42,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:42,996 INFO L93 Difference]: Finished difference Result 246 states and 305 transitions. [2021-12-22 10:35:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 10:35:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-22 10:35:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:43,001 INFO L225 Difference]: With dead ends: 246 [2021-12-22 10:35:43,001 INFO L226 Difference]: Without dead ends: 221 [2021-12-22 10:35:43,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:35:43,003 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 371 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:43,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 232 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:35:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-22 10:35:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 173. [2021-12-22 10:35:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2616279069767442) internal successors, (217), 172 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 217 transitions. [2021-12-22 10:35:43,034 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 217 transitions. Word has length 50 [2021-12-22 10:35:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:43,034 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 217 transitions. [2021-12-22 10:35:43,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 217 transitions. [2021-12-22 10:35:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 10:35:43,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:43,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:43,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:43,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:43,253 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1011034147, now seen corresponding path program 1 times [2021-12-22 10:35:43,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:43,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554179836] [2021-12-22 10:35:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:35:43,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:43,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554179836] [2021-12-22 10:35:43,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554179836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:43,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346841375] [2021-12-22 10:35:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:43,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:43,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:43,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:43,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:35:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-22 10:35:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:43,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 10:35:43,921 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 10:35:43,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 10:35:44,022 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-22 10:35:44,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-22 10:35:44,107 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-22 10:35:44,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-22 10:35:44,261 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-22 10:35:44,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-22 10:35:44,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 10:35:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:44,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2021-12-22 10:35:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:35:44,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-22 10:35:44,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-22 10:35:44,596 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:35:44,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 45 [2021-12-22 10:35:44,674 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 10:35:44,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 45 [2021-12-22 10:35:44,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-12-22 10:35:45,220 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-22 10:35:45,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 34 [2021-12-22 10:35:45,269 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:35:45,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 38 [2021-12-22 10:35:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 10:35:45,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:46,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_480 Int)) (not (= (let ((.cse3 (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base|) |c_ULTIMATE.start_node_create_with_sublist_#res#1.offset| 0)))) (store .cse5 |c_ULTIMATE.start_sll_append_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset| |c_ULTIMATE.start_node_create_with_sublist_#res#1.offset|)))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base|) |c_ULTIMATE.start_node_create_with_sublist_#res#1.offset| v_ArrVal_480)))) (store .cse4 |c_ULTIMATE.start_sll_append_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset| |c_ULTIMATE.start_node_create_with_sublist_#res#1.base|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|)) (.cse2 (+ (select (select .cse3 |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 4))) (select (select .cse0 (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) 0))) is different from false [2021-12-22 10:35:46,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:35:46,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 24641 treesize of output 24020