./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_length_check-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:22:12,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:22:12,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:22:12,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:22:12,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:22:12,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:22:12,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:22:12,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:22:12,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:22:12,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:22:12,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:22:12,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:22:12,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:22:12,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:22:12,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:22:12,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:22:12,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:22:12,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:22:12,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:22:12,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:22:12,313 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:22:12,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:22:12,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:22:12,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:22:12,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:22:12,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:22:12,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:22:12,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:22:12,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:22:12,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:22:12,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:22:12,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:22:12,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:22:12,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:22:12,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:22:12,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:22:12,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:22:12,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:22:12,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:22:12,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:22:12,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:22:12,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:22:12,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:22:12,369 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:22:12,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:22:12,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:22:12,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:22:12,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:22:12,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:22:12,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:22:12,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:22:12,372 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:22:12,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:22:12,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:22:12,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:22:12,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:22:12,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:22:12,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:22:12,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:22:12,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:22:12,374 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:22:12,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:22:12,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:22:12,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:22:12,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:22:12,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:22:12,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:22:12,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:22:12,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:22:12,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:22:12,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:22:12,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:22:12,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:22:12,376 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:22:12,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:22:12,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:22:12,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 [2022-07-13 15:22:12,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:22:12,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:22:12,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:22:12,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:22:12,636 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:22:12,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2022-07-13 15:22:12,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2600eee6f/ed8ec0441b254ae282fb44f8c8855ff9/FLAGa93a56051 [2022-07-13 15:22:13,185 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:22:13,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2022-07-13 15:22:13,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2600eee6f/ed8ec0441b254ae282fb44f8c8855ff9/FLAGa93a56051 [2022-07-13 15:22:13,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2600eee6f/ed8ec0441b254ae282fb44f8c8855ff9 [2022-07-13 15:22:13,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:22:13,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:22:13,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:22:13,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:22:13,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:22:13,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:13,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bba2194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13, skipping insertion in model container [2022-07-13 15:22:13,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:13,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:22:13,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:22:13,874 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_length_check-2.i[23814,23827] [2022-07-13 15:22:13,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:22:13,886 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:22:13,927 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_length_check-2.i[23814,23827] [2022-07-13 15:22:13,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:22:13,956 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:22:13,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13 WrapperNode [2022-07-13 15:22:13,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:22:13,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:22:13,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:22:13,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:22:13,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:13,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,015 INFO L137 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2022-07-13 15:22:14,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:22:14,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:22:14,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:22:14,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:22:14,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:22:14,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:22:14,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:22:14,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:22:14,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (1/1) ... [2022-07-13 15:22:14,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:22:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:14,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:22:14,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:22:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 15:22:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:22:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 15:22:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 15:22:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 15:22:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:22:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:22:14,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:22:14,203 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:22:14,205 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:22:14,327 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:22:14,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:22:14,332 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 15:22:14,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:22:14 BoogieIcfgContainer [2022-07-13 15:22:14,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:22:14,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:22:14,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:22:14,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:22:14,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:22:13" (1/3) ... [2022-07-13 15:22:14,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fc51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:22:14, skipping insertion in model container [2022-07-13 15:22:14,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:22:13" (2/3) ... [2022-07-13 15:22:14,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fc51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:22:14, skipping insertion in model container [2022-07-13 15:22:14,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:22:14" (3/3) ... [2022-07-13 15:22:14,342 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2022-07-13 15:22:14,355 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:22:14,355 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:22:14,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:22:14,406 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ab055c8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47d4e163 [2022-07-13 15:22:14,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:22:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) [2022-07-13 15:22:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 15:22:14,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:14,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:14,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2022-07-13 15:22:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29076367] [2022-07-13 15:22:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:14,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29076367] [2022-07-13 15:22:14,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29076367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:22:14,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:22:14,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:22:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832034547] [2022-07-13 15:22:14,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:22:14,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:22:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:22:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:22:14,587 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-13 15:22:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:14,601 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-07-13 15:22:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:22:14,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-07-13 15:22:14,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:14,609 INFO L225 Difference]: With dead ends: 41 [2022-07-13 15:22:14,609 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 15:22:14,612 INFO L412 NwaCegarLoop]: 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 [2022-07-13 15:22:14,615 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-07-13 15:22:14,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 15:22:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-13 15:22:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-07-13 15:22:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-13 15:22:14,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-07-13 15:22:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:14,642 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-13 15:22:14,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-07-13 15:22:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-13 15:22:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 15:22:14,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:14,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:14,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:22:14,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2022-07-13 15:22:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838203201] [2022-07-13 15:22:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:14,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838203201] [2022-07-13 15:22:14,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838203201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:22:14,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:22:14,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 15:22:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580862604] [2022-07-13 15:22:14,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:22:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:22:14,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:22:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:22:14,756 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-07-13 15:22:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:14,823 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-07-13 15:22:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:22:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-07-13 15:22:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:14,826 INFO L225 Difference]: With dead ends: 43 [2022-07-13 15:22:14,826 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 15:22:14,826 INFO L412 NwaCegarLoop]: 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 [2022-07-13 15:22:14,828 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:14,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 15:22:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2022-07-13 15:22:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-07-13 15:22:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-07-13 15:22:14,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2022-07-13 15:22:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:14,842 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-07-13 15:22:14,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-07-13 15:22:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-07-13 15:22:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 15:22:14,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:14,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:14,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:22:14,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2022-07-13 15:22:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:14,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604440137] [2022-07-13 15:22:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:14,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:14,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604440137] [2022-07-13 15:22:14,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604440137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:14,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610570779] [2022-07-13 15:22:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:14,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:14,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:14,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:14,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:22:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:22:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:15,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:15,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610570779] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:15,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:15,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-13 15:22:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909366647] [2022-07-13 15:22:15,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 15:22:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 15:22:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:22:15,091 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-07-13 15:22:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:15,154 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-07-13 15:22:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:22:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 17 [2022-07-13 15:22:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:15,156 INFO L225 Difference]: With dead ends: 48 [2022-07-13 15:22:15,156 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 15:22:15,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:22:15,158 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:15,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 15:22:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-07-13 15:22:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-07-13 15:22:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-13 15:22:15,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-07-13 15:22:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:15,165 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-13 15:22:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-07-13 15:22:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-13 15:22:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 15:22:15,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:15,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:15,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:22:15,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:15,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash -485609004, now seen corresponding path program 2 times [2022-07-13 15:22:15,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:15,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752889536] [2022-07-13 15:22:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:15,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:22:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:15,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752889536] [2022-07-13 15:22:15,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752889536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:22:15,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:22:15,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:22:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603020265] [2022-07-13 15:22:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:22:15,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:22:15,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:22:15,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:22:15,522 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-07-13 15:22:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:15,582 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-07-13 15:22:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:22:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2022-07-13 15:22:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:15,585 INFO L225 Difference]: With dead ends: 27 [2022-07-13 15:22:15,585 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 15:22:15,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:22:15,587 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:15,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 56 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 15:22:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 15:22:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-07-13 15:22:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-13 15:22:15,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 20 [2022-07-13 15:22:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:15,593 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-13 15:22:15,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-07-13 15:22:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-13 15:22:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 15:22:15,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:15,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:15,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 15:22:15,595 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 1 times [2022-07-13 15:22:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:15,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052840750] [2022-07-13 15:22:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052840750] [2022-07-13 15:22:15,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052840750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477615999] [2022-07-13 15:22:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:15,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:15,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:15,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:15,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:22:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 15:22:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:15,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-13 15:22:16,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-13 15:22:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:16,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:16,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477615999] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:16,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:16,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 12 [2022-07-13 15:22:16,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022189590] [2022-07-13 15:22:16,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:16,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 15:22:16,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 15:22:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:22:16,072 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2022-07-13 15:22:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:16,196 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-07-13 15:22:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:22:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 21 [2022-07-13 15:22:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:16,198 INFO L225 Difference]: With dead ends: 30 [2022-07-13 15:22:16,198 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 15:22:16,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-07-13 15:22:16,199 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:16,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 15:22:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-13 15:22:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-07-13 15:22:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-13 15:22:16,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2022-07-13 15:22:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:16,205 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-13 15:22:16,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2022-07-13 15:22:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-13 15:22:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 15:22:16,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:16,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:16,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:22:16,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:16,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1160848428, now seen corresponding path program 2 times [2022-07-13 15:22:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243331381] [2022-07-13 15:22:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:16,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 15:22:16,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243331381] [2022-07-13 15:22:16,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243331381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111954328] [2022-07-13 15:22:16,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:22:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:16,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:16,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:22:16,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:22:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:22:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 15:22:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 15:22:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 15:22:16,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111954328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:16,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:16,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 15:22:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281195006] [2022-07-13 15:22:16,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:22:16,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:22:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:22:16,834 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-07-13 15:22:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:16,909 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-07-13 15:22:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:22:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 22 [2022-07-13 15:22:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:16,913 INFO L225 Difference]: With dead ends: 50 [2022-07-13 15:22:16,913 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 15:22:16,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:22:16,915 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:16,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 15:22:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-07-13 15:22:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2022-07-13 15:22:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-13 15:22:16,930 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2022-07-13 15:22:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:16,931 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-13 15:22:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-07-13 15:22:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-13 15:22:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 15:22:16,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:16,932 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:16,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:22:17,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:17,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:17,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1574908636, now seen corresponding path program 3 times [2022-07-13 15:22:17,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367525946] [2022-07-13 15:22:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:17,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367525946] [2022-07-13 15:22:17,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367525946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:17,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188086043] [2022-07-13 15:22:17,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:22:17,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:17,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:17,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:22:17,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 15:22:17,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:22:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-13 15:22:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:17,403 INFO L390 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 [2022-07-13 15:22:17,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-13 15:22:17,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-13 15:22:17,486 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 15:22:17,486 INFO L390 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 [2022-07-13 15:22:17,560 INFO L390 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 19 treesize of output 18 [2022-07-13 15:22:17,564 INFO L390 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 23 treesize of output 22 [2022-07-13 15:22:17,752 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-07-13 15:22:17,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2022-07-13 15:22:17,765 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-13 15:22:17,766 INFO L390 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 26 treesize of output 16 [2022-07-13 15:22:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:22:17,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:19,872 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (and (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) is different from false [2022-07-13 15:22:20,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 15:22:20,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:22:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 15:22:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-13 15:22:20,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188086043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:20,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:20,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-13 15:22:20,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997728868] [2022-07-13 15:22:20,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:20,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 15:22:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 15:22:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2022-07-13 15:22:20,198 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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) [2022-07-13 15:22:22,255 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (and (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0)) is different from false [2022-07-13 15:22:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:22,443 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-07-13 15:22:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 15:22:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 23 [2022-07-13 15:22:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:22,446 INFO L225 Difference]: With dead ends: 63 [2022-07-13 15:22:22,446 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 15:22:22,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=78, Invalid=434, Unknown=2, NotChecked=86, Total=600 [2022-07-13 15:22:22,448 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:22,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 193 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-07-13 15:22:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 15:22:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-07-13 15:22:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 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) [2022-07-13 15:22:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-13 15:22:22,459 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 23 [2022-07-13 15:22:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:22,459 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-13 15:22:22,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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) [2022-07-13 15:22:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-13 15:22:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 15:22:22,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:22,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:22,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:22:22,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:22,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2090698365, now seen corresponding path program 1 times [2022-07-13 15:22:22,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:22,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280732248] [2022-07-13 15:22:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:22,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:22,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280732248] [2022-07-13 15:22:22,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280732248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987485273] [2022-07-13 15:22:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:22,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:22,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:22,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:22,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:22:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 15:22:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:22,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:22,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987485273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:22,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:22,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-07-13 15:22:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881070902] [2022-07-13 15:22:22,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:22,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 15:22:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 15:22:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:22:22,906 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-07-13 15:22:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:23,003 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-07-13 15:22:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:22:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 25 [2022-07-13 15:22:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:23,004 INFO L225 Difference]: With dead ends: 61 [2022-07-13 15:22:23,004 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 15:22:23,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:22:23,005 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:23,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 15:22:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-07-13 15:22:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-07-13 15:22:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-13 15:22:23,013 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 25 [2022-07-13 15:22:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:23,013 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-13 15:22:23,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-07-13 15:22:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-13 15:22:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 15:22:23,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:23,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:23,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 15:22:23,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:23,227 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2022-07-13 15:22:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098816799] [2022-07-13 15:22:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:22:23,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098816799] [2022-07-13 15:22:23,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098816799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256032311] [2022-07-13 15:22:23,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:22:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:23,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:23,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:22:23,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:22:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:22:23,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:22:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 15:22:23,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:22:23,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256032311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:22:23,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 15:22:23,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-07-13 15:22:23,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670969674] [2022-07-13 15:22:23,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:22:23,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:22:23,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:22:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:22:23,393 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-13 15:22:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:23,446 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-13 15:22:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 15:22:23,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 26 [2022-07-13 15:22:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:23,448 INFO L225 Difference]: With dead ends: 51 [2022-07-13 15:22:23,448 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 15:22:23,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:22:23,449 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:23,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:22:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 15:22:23,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-13 15:22:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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) [2022-07-13 15:22:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-13 15:22:23,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2022-07-13 15:22:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:23,454 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-13 15:22:23,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-13 15:22:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-13 15:22:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 15:22:23,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:23,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:23,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 15:22:23,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:23,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash -517577932, now seen corresponding path program 2 times [2022-07-13 15:22:23,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478686201] [2022-07-13 15:22:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:23,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478686201] [2022-07-13 15:22:23,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478686201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071485578] [2022-07-13 15:22:23,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:22:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:23,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:23,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:22:23,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:22:23,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:22:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 15:22:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:23,931 INFO L390 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 [2022-07-13 15:22:23,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-07-13 15:22:24,007 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 15:22:24,008 INFO L390 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 [2022-07-13 15:22:24,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-13 15:22:24,055 INFO L390 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 20 treesize of output 19 [2022-07-13 15:22:24,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 15:22:24,203 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-13 15:22:24,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-07-13 15:22:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:24,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 15:22:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:24,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071485578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:24,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:24,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-07-13 15:22:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188046147] [2022-07-13 15:22:24,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 15:22:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 15:22:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-07-13 15:22:24,709 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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) [2022-07-13 15:22:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:25,205 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-07-13 15:22:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:22:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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 28 [2022-07-13 15:22:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:25,207 INFO L225 Difference]: With dead ends: 37 [2022-07-13 15:22:25,207 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 15:22:25,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-07-13 15:22:25,208 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:25,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 203 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-07-13 15:22:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 15:22:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-13 15:22:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2022-07-13 15:22:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-13 15:22:25,213 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2022-07-13 15:22:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:25,214 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-13 15:22:25,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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) [2022-07-13 15:22:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-13 15:22:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 15:22:25,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:25,215 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:25,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:22:25,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:25,432 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1186607556, now seen corresponding path program 3 times [2022-07-13 15:22:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:25,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842847256] [2022-07-13 15:22:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:22:25,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842847256] [2022-07-13 15:22:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842847256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289988798] [2022-07-13 15:22:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:22:25,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:25,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:25,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:25,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:22:25,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 15:22:25,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:22:25,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:22:25,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:22:25,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:22:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 15:22:25,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289988798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:22:25,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:22:25,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-13 15:22:25,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45481483] [2022-07-13 15:22:25,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:22:25,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 15:22:25,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:22:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 15:22:25,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-13 15:22:25,947 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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) [2022-07-13 15:22:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:22:26,060 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-07-13 15:22:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:22:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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 29 [2022-07-13 15:22:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:22:26,061 INFO L225 Difference]: With dead ends: 61 [2022-07-13 15:22:26,061 INFO L226 Difference]: Without dead ends: 56 [2022-07-13 15:22:26,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-07-13 15:22:26,062 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:22:26,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 163 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:22:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-13 15:22:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-07-13 15:22:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 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) [2022-07-13 15:22:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-13 15:22:26,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 29 [2022-07-13 15:22:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:22:26,070 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-13 15:22:26,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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) [2022-07-13 15:22:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-13 15:22:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:22:26,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:22:26,071 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:22:26,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 15:22:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 15:22:26,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:22:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:22:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1818217164, now seen corresponding path program 4 times [2022-07-13 15:22:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:22:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345694493] [2022-07-13 15:22:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:22:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:22:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:22:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:22:26,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345694493] [2022-07-13 15:22:26,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345694493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:22:26,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721450048] [2022-07-13 15:22:26,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:22:26,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:22:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:22:26,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:22:26,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:22:26,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:22:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:22:26,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-13 15:22:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:22:26,811 INFO L390 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 [2022-07-13 15:22:26,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-13 15:22:26,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-13 15:22:26,870 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-13 15:22:26,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-13 15:22:26,926 INFO L390 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 19 treesize of output 18 [2022-07-13 15:22:26,931 INFO L390 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 23 treesize of output 22 [2022-07-13 15:22:26,982 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-13 15:22:26,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-13 15:22:27,080 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-13 15:22:27,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2022-07-13 15:22:27,094 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-07-13 15:22:27,094 INFO L390 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 15:22:27,925 INFO L356 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2022-07-13 15:22:27,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 51 [2022-07-13 15:22:28,125 INFO L356 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2022-07-13 15:22:28,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 40 [2022-07-13 15:22:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 15:22:28,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:23:03,814 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:23:03,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11232 treesize of output 10728 [2022-07-13 15:23:07,562 INFO L356 Elim1Store]: treesize reduction 1848, result has 27.0 percent of original size [2022-07-13 15:23:07,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 25 new quantified variables, introduced 253 case distinctions, treesize of input 1341439 treesize of output 1257890 [2022-07-13 15:24:26,748 WARN L233 SmtUtils]: Spent 1.32m on a formula simplification. DAG size of input: 2449 DAG size of output: 2398 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 15:24:43,441 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 1979 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 15:25:25,735 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification that was a NOOP. DAG size: 1976 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 15:25:41,313 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 1972 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 15:25:56,690 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification that was a NOOP. DAG size: 1969 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 15:26:36,724 WARN L233 SmtUtils]: Spent 7.85s on a formula simplification that was a NOOP. DAG size: 1965 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)