./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-simple/dll2n_remove_all.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 b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 14:53:38,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 14:53:38,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 14:53:38,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 14:53:38,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 14:53:38,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 14:53:38,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 14:53:38,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 14:53:38,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 14:53:38,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 14:53:38,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 14:53:38,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 14:53:38,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 14:53:38,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 14:53:38,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 14:53:38,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 14:53:38,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 14:53:38,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 14:53:38,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 14:53:38,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 14:53:38,455 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 14:53:38,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 14:53:38,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 14:53:38,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 14:53:38,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 14:53:38,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 14:53:38,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 14:53:38,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 14:53:38,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 14:53:38,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 14:53:38,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 14:53:38,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 14:53:38,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 14:53:38,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 14:53:38,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 14:53:38,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 14:53:38,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 14:53:38,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 14:53:38,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 14:53:38,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 14:53:38,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 14:53:38,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 14:53:38,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 14:53:38,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 14:53:38,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 14:53:38,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 14:53:38,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 14:53:38,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 14:53:38,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 14:53:38,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 14:53:38,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 14:53:38,507 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 14:53:38,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 14:53:38,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 14:53:38,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 14:53:38,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 14:53:38,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 14:53:38,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 14:53:38,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 14:53:38,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 14:53:38,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 14:53:38,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 14:53:38,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 14:53:38,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 14:53:38,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 14:53:38,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 14:53:38,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 14:53:38,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 14:53:38,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 14:53:38,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 14:53:38,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 14:53:38,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 14:53:38,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 14:53:38,513 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 14:53:38,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 14:53:38,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 14:53:38,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 [2022-07-22 14:53:38,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 14:53:38,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 14:53:38,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 14:53:38,822 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 14:53:38,823 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 14:53:38,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2022-07-22 14:53:38,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8105c5103/366f7b092fc34345b719d61ff5839e6c/FLAGf62d07584 [2022-07-22 14:53:39,334 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 14:53:39,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2022-07-22 14:53:39,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8105c5103/366f7b092fc34345b719d61ff5839e6c/FLAGf62d07584 [2022-07-22 14:53:39,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8105c5103/366f7b092fc34345b719d61ff5839e6c [2022-07-22 14:53:39,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 14:53:39,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 14:53:39,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 14:53:39,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 14:53:39,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 14:53:39,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:53:39" (1/1) ... [2022-07-22 14:53:39,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123be584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:39, skipping insertion in model container [2022-07-22 14:53:39,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:53:39" (1/1) ... [2022-07-22 14:53:39,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 14:53:39,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 14:53:39,995 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-simple/dll2n_remove_all.i[24090,24103] [2022-07-22 14:53:39,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 14:53:40,006 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 14:53:40,060 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-simple/dll2n_remove_all.i[24090,24103] [2022-07-22 14:53:40,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 14:53:40,082 INFO L208 MainTranslator]: Completed translation [2022-07-22 14:53:40,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40 WrapperNode [2022-07-22 14:53:40,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 14:53:40,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 14:53:40,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 14:53:40,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 14:53:40,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,125 INFO L137 Inliner]: procedures = 126, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-07-22 14:53:40,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 14:53:40,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 14:53:40,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 14:53:40,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 14:53:40,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 14:53:40,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 14:53:40,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 14:53:40,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 14:53:40,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (1/1) ... [2022-07-22 14:53:40,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 14:53:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:53:40,186 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) [2022-07-22 14:53:40,188 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 [2022-07-22 14:53:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-22 14:53:40,219 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-22 14:53:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 14:53:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 14:53:40,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 14:53:40,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 14:53:40,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 14:53:40,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 14:53:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 14:53:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 14:53:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 14:53:40,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 14:53:40,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 14:53:40,342 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 14:53:40,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 14:53:40,379 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-22 14:53:40,492 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 14:53:40,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 14:53:40,497 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 14:53:40,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:53:40 BoogieIcfgContainer [2022-07-22 14:53:40,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 14:53:40,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 14:53:40,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 14:53:40,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 14:53:40,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 02:53:39" (1/3) ... [2022-07-22 14:53:40,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6b7f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 02:53:40, skipping insertion in model container [2022-07-22 14:53:40,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:53:40" (2/3) ... [2022-07-22 14:53:40,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6b7f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 02:53:40, skipping insertion in model container [2022-07-22 14:53:40,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:53:40" (3/3) ... [2022-07-22 14:53:40,506 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2022-07-22 14:53:40,518 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 14:53:40,528 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 14:53:40,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 14:53:40,611 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@1b0294db, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51a2c0b0 [2022-07-22 14:53:40,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 14:53:40,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 14:53:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 14:53:40,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:40,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:40,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1068252250, now seen corresponding path program 1 times [2022-07-22 14:53:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:40,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432597543] [2022-07-22 14:53:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:40,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:40,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432597543] [2022-07-22 14:53:40,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432597543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:53:40,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:53:40,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 14:53:40,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911644117] [2022-07-22 14:53:40,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:53:40,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 14:53:40,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:53:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 14:53:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 14:53:40,892 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-07-22 14:53:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:53:40,907 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-22 14:53:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 14:53:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-07-22 14:53:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:53:40,915 INFO L225 Difference]: With dead ends: 38 [2022-07-22 14:53:40,915 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 14:53:40,917 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 [2022-07-22 14:53:40,920 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 [2022-07-22 14:53:40,922 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] [2022-07-22 14:53:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 14:53:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-22 14:53:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-07-22 14:53:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-07-22 14:53:40,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2022-07-22 14:53:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:53:40,944 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-07-22 14:53:40,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-07-22 14:53:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-07-22 14:53:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 14:53:40,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:40,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 14:53:40,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -751399870, now seen corresponding path program 1 times [2022-07-22 14:53:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:40,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963346069] [2022-07-22 14:53:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963346069] [2022-07-22 14:53:40,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963346069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:53:40,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:53:40,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 14:53:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602838247] [2022-07-22 14:53:40,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:53:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 14:53:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:53:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 14:53:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 14:53:40,999 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-22 14:53:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:53:41,011 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-07-22 14:53:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 14:53:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-07-22 14:53:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:53:41,012 INFO L225 Difference]: With dead ends: 34 [2022-07-22 14:53:41,012 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 14:53:41,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 14:53:41,014 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:53:41,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:53:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 14:53:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-07-22 14:53:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 14:53:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-22 14:53:41,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2022-07-22 14:53:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:53:41,019 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-22 14:53:41,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-22 14:53:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-22 14:53:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 14:53:41,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:41,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 14:53:41,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -799756430, now seen corresponding path program 1 times [2022-07-22 14:53:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244538419] [2022-07-22 14:53:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:41,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244538419] [2022-07-22 14:53:41,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244538419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:53:41,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 14:53:41,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 14:53:41,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673361599] [2022-07-22 14:53:41,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:53:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 14:53:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:53:41,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 14:53:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 14:53:41,120 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-07-22 14:53:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:53:41,137 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-07-22 14:53:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 14:53:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2022-07-22 14:53:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:53:41,139 INFO L225 Difference]: With dead ends: 39 [2022-07-22 14:53:41,139 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 14:53:41,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 14:53:41,141 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:53:41,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:53:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 14:53:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-22 14:53:41,145 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) [2022-07-22 14:53:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-22 14:53:41,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-07-22 14:53:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:53:41,147 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-22 14:53:41,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-07-22 14:53:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-22 14:53:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 14:53:41,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:41,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:41,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 14:53:41,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:41,149 INFO L85 PathProgramCache]: Analyzing trace with hash -119698060, now seen corresponding path program 1 times [2022-07-22 14:53:41,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:41,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110212834] [2022-07-22 14:53:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:41,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:41,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:41,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110212834] [2022-07-22 14:53:41,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110212834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 14:53:41,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210635868] [2022-07-22 14:53:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:41,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 14:53:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:53:41,232 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) [2022-07-22 14:53:41,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 14:53:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 14:53:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:53:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:41,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:53:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:41,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210635868] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:53:41,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 14:53:41,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-22 14:53:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209471053] [2022-07-22 14:53:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 14:53:41,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 14:53:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:53:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 14:53:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:53:41,413 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-07-22 14:53:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:53:41,429 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-07-22 14:53:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:53:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 14 [2022-07-22 14:53:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:53:41,430 INFO L225 Difference]: With dead ends: 35 [2022-07-22 14:53:41,430 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 14:53:41,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:53:41,432 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:53:41,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:53:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 14:53:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 14:53:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2022-07-22 14:53:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-22 14:53:41,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-07-22 14:53:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:53:41,437 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-22 14:53:41,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-07-22 14:53:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-22 14:53:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 14:53:41,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:41,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:41,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 14:53:41,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 14:53:41,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:41,652 INFO L85 PathProgramCache]: Analyzing trace with hash 624467328, now seen corresponding path program 1 times [2022-07-22 14:53:41,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877570466] [2022-07-22 14:53:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:41,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 14:53:41,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877570466] [2022-07-22 14:53:41,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877570466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 14:53:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065350711] [2022-07-22 14:53:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:41,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 14:53:41,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:53:41,783 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) [2022-07-22 14:53:41,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 14:53:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 14:53:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:53:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 14:53:41,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 14:53:41,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065350711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 14:53:41,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 14:53:41,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-22 14:53:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202104784] [2022-07-22 14:53:41,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 14:53:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 14:53:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:53:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 14:53:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 14:53:41,940 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-07-22 14:53:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:53:41,960 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-22 14:53:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 14:53:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2022-07-22 14:53:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:53:41,961 INFO L225 Difference]: With dead ends: 33 [2022-07-22 14:53:41,961 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 14:53:41,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 14:53:41,965 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:53:41,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:53:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 14:53:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-22 14:53:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2022-07-22 14:53:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 14:53:41,971 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2022-07-22 14:53:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:53:41,972 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 14:53:41,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-07-22 14:53:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 14:53:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 14:53:41,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:41,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:41,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 14:53:42,176 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 [2022-07-22 14:53:42,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash 303997821, now seen corresponding path program 1 times [2022-07-22 14:53:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:42,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097056408] [2022-07-22 14:53:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 14:53:42,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:42,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097056408] [2022-07-22 14:53:42,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097056408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 14:53:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874770324] [2022-07-22 14:53:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:42,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 14:53:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:53:42,317 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) [2022-07-22 14:53:42,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 14:53:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 14:53:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:53:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 14:53:42,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:53:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 14:53:42,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874770324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 14:53:42,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 14:53:42,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-07-22 14:53:42,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069610028] [2022-07-22 14:53:42,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 14:53:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 14:53:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 14:53:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 14:53:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 14:53:42,505 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2022-07-22 14:53:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 14:53:42,563 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-22 14:53:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 14:53:42,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 24 [2022-07-22 14:53:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 14:53:42,564 INFO L225 Difference]: With dead ends: 34 [2022-07-22 14:53:42,566 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 14:53:42,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 14:53:42,569 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 14:53:42,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 55 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 14:53:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 14:53:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-22 14:53:42,577 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) [2022-07-22 14:53:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-22 14:53:42,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2022-07-22 14:53:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 14:53:42,580 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-22 14:53:42,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2022-07-22 14:53:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-22 14:53:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 14:53:42,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 14:53:42,582 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 14:53:42,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 14:53:42,790 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 [2022-07-22 14:53:42,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 14:53:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 14:53:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2095960992, now seen corresponding path program 2 times [2022-07-22 14:53:42,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 14:53:42,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939907651] [2022-07-22 14:53:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 14:53:42,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 14:53:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 14:53:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:43,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 14:53:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939907651] [2022-07-22 14:53:43,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939907651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 14:53:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85127349] [2022-07-22 14:53:43,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 14:53:43,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 14:53:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 14:53:43,590 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) [2022-07-22 14:53:43,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 14:53:43,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 14:53:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 14:53:43,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-22 14:53:43,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 14:53:43,761 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 [2022-07-22 14:53:43,819 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 14:53:43,819 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 [2022-07-22 14:53:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:43,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 14:53:43,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:43,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 14:53:44,022 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 14:53:44,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-22 14:53:44,117 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-22 14:53:44,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-07-22 14:53:44,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 14:53:44,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:44,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 16 treesize of output 21 [2022-07-22 14:53:44,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 14:53:44,236 INFO L356 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-07-22 14:53:44,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 56 [2022-07-22 14:53:44,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-07-22 14:53:44,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:44,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 14:53:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:44,702 INFO L356 Elim1Store]: treesize reduction 309, result has 9.1 percent of original size [2022-07-22 14:53:44,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 180 treesize of output 103 [2022-07-22 14:53:44,722 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-07-22 14:53:44,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 78 [2022-07-22 14:53:44,835 INFO L356 Elim1Store]: treesize reduction 79, result has 14.1 percent of original size [2022-07-22 14:53:44,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 158 treesize of output 90 [2022-07-22 14:53:44,844 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 14:53:44,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 88 [2022-07-22 14:53:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:45,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 14:53:45,021 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-07-22 14:53:45,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 47 [2022-07-22 14:53:45,035 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-22 14:53:45,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2022-07-22 14:53:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 14:53:45,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 14:53:51,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 14:53:51,818 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 14:53:51,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 2649 treesize of output 2046 [2022-07-22 14:53:51,899 INFO L356 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-07-22 14:53:51,899 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 2090 treesize of output 1426 [2022-07-22 14:53:52,076 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_4 (Array Int Int))) (or (forall ((v_arrayElimArr_3 (Array Int Int)) (v_prenex_1 Int) (v_ArrVal_419 Int)) (let ((.cse8 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse2 (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse9 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse8 v_prenex_1))))) (let ((.cse6 (+ (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (= (let ((.cse4 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse8 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse1 (select (select .cse2 .cse5) .cse6))) (select (let ((.cse3 (select (select .cse4 .cse5) .cse6))) (select (let ((.cse0 (store .cse2 .cse3 (store (select .cse2 .cse3) (+ .cse1 8) v_ArrVal_419)))) (store .cse0 |c_ULTIMATE.start_main_~#s~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset| .cse1))) .cse3)) (+ .cse1 4))))) 0) (not (= (select v_arrayElimArr_4 .cse6) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_3 .cse6)))))))) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_arrayElimArr_4 (Array Int Int))) (or (forall ((v_arrayElimArr_3 (Array Int Int)) (v_ArrVal_418 Int) (v_ArrVal_416 Int)) (let ((.cse19 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse17 (let ((.cse20 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse20 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse20 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse19 v_ArrVal_416))))) (let ((.cse11 (+ (select (select .cse17 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= (select v_arrayElimArr_4 .cse11) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (= (let ((.cse14 (let ((.cse18 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse18 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse18 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse19 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse16 (select (select .cse14 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse15 (select (select .cse17 .cse16) .cse11))) (select (let ((.cse13 (select (select .cse14 .cse16) .cse11))) (select (let ((.cse12 (store .cse14 .cse13 (store (select .cse14 .cse13) (+ .cse15 8) v_ArrVal_418)))) (store .cse12 |c_ULTIMATE.start_main_~#s~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset| .cse13))) .cse13)) (+ .cse15 4))))) 0) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_3 .cse11)))))))) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (select (let ((.cse21 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse21 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse21 |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2022-07-22 14:53:53,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 14:53:53,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 14:53:53,297 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1706 treesize of output 1156 [2022-07-22 14:53:53,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 14:53:53,318 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 14:53:53,318 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1134 treesize of output 704 [2022-07-22 14:53:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 14:53:58,409 INFO L356 Elim1Store]: treesize reduction 231, result has 60.6 percent of original size [2022-07-22 14:53:58,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 1285348 treesize of output 1126585 [2022-07-22 14:54:04,774 INFO L356 Elim1Store]: treesize reduction 63, result has 62.0 percent of original size [2022-07-22 14:54:04,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 53613076 treesize of output 48036515 [2022-07-22 14:55:54,455 WARN L233 SmtUtils]: Spent 1.83m on a formula simplification that was a NOOP. DAG size: 5588 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-22 14:57:43,434 WARN L233 SmtUtils]: Spent 1.82m on a formula simplification that was a NOOP. DAG size: 5580 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-22 14:57:47,737 INFO L356 Elim1Store]: treesize reduction 75, result has 59.5 percent of original size [2022-07-22 14:57:47,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57380928 treesize of output 52441383