./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_reverse.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 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 14:41:29,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 14:41:29,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 14:41:29,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 14:41:29,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 14:41:29,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 14:41:29,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 14:41:29,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 14:41:29,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 14:41:29,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 14:41:29,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 14:41:29,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 14:41:29,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 14:41:29,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 14:41:29,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 14:41:29,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 14:41:29,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 14:41:29,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 14:41:29,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 14:41:29,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 14:41:30,000 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 14:41:30,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 14:41:30,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 14:41:30,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 14:41:30,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 14:41:30,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 14:41:30,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 14:41:30,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 14:41:30,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 14:41:30,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 14:41:30,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 14:41:30,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 14:41:30,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 14:41:30,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 14:41:30,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 14:41:30,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 14:41:30,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 14:41:30,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 14:41:30,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 14:41:30,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 14:41:30,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 14:41:30,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 14:41:30,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 14:41:30,056 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 14:41:30,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 14:41:30,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 14:41:30,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 14:41:30,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 14:41:30,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 14:41:30,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 14:41:30,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 14:41:30,059 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 14:41:30,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 14:41:30,060 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 14:41:30,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 14:41:30,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 14:41:30,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 14:41:30,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 14:41:30,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 14:41:30,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 14:41:30,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 14:41:30,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 14:41:30,062 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 14:41:30,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 14:41:30,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 14:41:30,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 14:41:30,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 14:41:30,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:41:30,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 14:41:30,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 14:41:30,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 14:41:30,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 14:41:30,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 14:41:30,064 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 14:41:30,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 14:41:30,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 14:41:30,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 [2022-07-19 14:41:30,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 14:41:30,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 14:41:30,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 14:41:30,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 14:41:30,298 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 14:41:30,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2022-07-19 14:41:30,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a5a61601/aa18db586ed24040a76c1420bbc50eb0/FLAG146360327 [2022-07-19 14:41:30,762 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 14:41:30,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2022-07-19 14:41:30,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a5a61601/aa18db586ed24040a76c1420bbc50eb0/FLAG146360327 [2022-07-19 14:41:31,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a5a61601/aa18db586ed24040a76c1420bbc50eb0 [2022-07-19 14:41:31,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 14:41:31,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 14:41:31,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 14:41:31,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 14:41:31,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 14:41:31,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7876f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31, skipping insertion in model container [2022-07-19 14:41:31,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 14:41:31,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 14:41:31,462 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_reverse.i[24275,24288] [2022-07-19 14:41:31,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:41:31,481 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 14:41:31,546 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_reverse.i[24275,24288] [2022-07-19 14:41:31,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 14:41:31,573 INFO L208 MainTranslator]: Completed translation [2022-07-19 14:41:31,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31 WrapperNode [2022-07-19 14:41:31,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 14:41:31,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 14:41:31,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 14:41:31,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 14:41:31,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,636 INFO L137 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-07-19 14:41:31,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 14:41:31,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 14:41:31,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 14:41:31,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 14:41:31,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 14:41:31,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 14:41:31,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 14:41:31,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 14:41:31,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (1/1) ... [2022-07-19 14:41:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 14:41:31,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:31,700 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) [2022-07-19 14:41:31,702 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 [2022-07-19 14:41:31,736 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-19 14:41:31,737 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-19 14:41:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 14:41:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 14:41:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 14:41:31,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 14:41:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 14:41:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 14:41:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 14:41:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 14:41:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 14:41:31,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 14:41:31,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 14:41:31,823 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 14:41:31,825 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 14:41:31,869 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-19 14:41:32,040 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 14:41:32,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 14:41:32,046 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 14:41:32,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:41:32 BoogieIcfgContainer [2022-07-19 14:41:32,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 14:41:32,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 14:41:32,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 14:41:32,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 14:41:32,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 02:41:31" (1/3) ... [2022-07-19 14:41:32,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766d2439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:41:32, skipping insertion in model container [2022-07-19 14:41:32,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 02:41:31" (2/3) ... [2022-07-19 14:41:32,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766d2439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 02:41:32, skipping insertion in model container [2022-07-19 14:41:32,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 02:41:32" (3/3) ... [2022-07-19 14:41:32,064 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2022-07-19 14:41:32,076 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 14:41:32,076 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 14:41:32,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 14:41:32,128 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@57be7f0f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5eca7644 [2022-07-19 14:41:32,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 14:41:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-07-19 14:41:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 14:41:32,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:32,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:32,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1067882842, now seen corresponding path program 1 times [2022-07-19 14:41:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918797469] [2022-07-19 14:41:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:41:32,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:32,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918797469] [2022-07-19 14:41:32,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918797469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:41:32,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:41:32,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 14:41:32,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709949846] [2022-07-19 14:41:32,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:41:32,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 14:41:32,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 14:41:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 14:41:32,319 INFO L87 Difference]: Start difference. First operand has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-07-19 14:41:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:32,334 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-19 14:41:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 14:41:32,337 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 [2022-07-19 14:41:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:32,345 INFO L225 Difference]: With dead ends: 42 [2022-07-19 14:41:32,345 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 14:41:32,348 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 [2022-07-19 14:41:32,352 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2022-07-19 14:41:32,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 14:41:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-19 14:41:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:41:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-19 14:41:32,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-07-19 14:41:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:32,385 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-19 14:41:32,385 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) [2022-07-19 14:41:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-19 14:41:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 14:41:32,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:32,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:32,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 14:41:32,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash -751387954, now seen corresponding path program 1 times [2022-07-19 14:41:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873868342] [2022-07-19 14:41:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:41:32,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:32,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873868342] [2022-07-19 14:41:32,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873868342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:41:32,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:41:32,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:41:32,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172178363] [2022-07-19 14:41:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:41:32,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:41:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:41:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:41:32,482 INFO L87 Difference]: Start difference. First operand 20 states and 24 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) [2022-07-19 14:41:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:32,507 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-07-19 14:41:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:41:32,508 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 [2022-07-19 14:41:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:32,510 INFO L225 Difference]: With dead ends: 38 [2022-07-19 14:41:32,511 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 14:41:32,514 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 [2022-07-19 14:41:32,516 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 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 [2022-07-19 14:41:32,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 14:41:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-07-19 14:41:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2022-07-19 14:41:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-19 14:41:32,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2022-07-19 14:41:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:32,529 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-19 14:41:32,529 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) [2022-07-19 14:41:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-19 14:41:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 14:41:32,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:32,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 14:41:32,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -799744514, now seen corresponding path program 1 times [2022-07-19 14:41:32,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:32,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236210126] [2022-07-19 14:41:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:41:32,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236210126] [2022-07-19 14:41:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236210126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:41:32,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:41:32,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 14:41:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37313239] [2022-07-19 14:41:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:41:32,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 14:41:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 14:41:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 14:41:32,634 INFO L87 Difference]: Start difference. First operand 21 states and 25 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) [2022-07-19 14:41:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:32,658 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-07-19 14:41:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 14:41:32,658 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 [2022-07-19 14:41:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:32,659 INFO L225 Difference]: With dead ends: 43 [2022-07-19 14:41:32,659 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 14:41:32,662 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 [2022-07-19 14:41:32,666 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 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 [2022-07-19 14:41:32,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 14:41:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-19 14:41:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-07-19 14:41:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-19 14:41:32,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-07-19 14:41:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:32,675 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-19 14:41:32,675 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) [2022-07-19 14:41:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-19 14:41:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 14:41:32,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:32,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:32,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 14:41:32,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash -119686144, now seen corresponding path program 1 times [2022-07-19 14:41:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770554394] [2022-07-19 14:41:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:41:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770554394] [2022-07-19 14:41:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770554394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:41:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142508405] [2022-07-19 14:41:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:32,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:32,751 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) [2022-07-19 14:41:32,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 14:41:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 14:41:32,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:41:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:41:32,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:41:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 14:41:32,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142508405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:41:32,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:41:32,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-19 14:41:32,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433878013] [2022-07-19 14:41:32,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:41:32,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:41:32,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:41:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:41:32,909 INFO L87 Difference]: Start difference. First operand 24 states and 28 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) [2022-07-19 14:41:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:32,925 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-07-19 14:41:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 14:41:32,926 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 [2022-07-19 14:41:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:32,926 INFO L225 Difference]: With dead ends: 39 [2022-07-19 14:41:32,926 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 14:41:32,927 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 [2022-07-19 14:41:32,928 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 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 [2022-07-19 14:41:32,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 14:41:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 14:41:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-07-19 14:41:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 14:41:32,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2022-07-19 14:41:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:32,932 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 14:41:32,932 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) [2022-07-19 14:41:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 14:41:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 14:41:32,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:32,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:32,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 14:41:33,154 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 [2022-07-19 14:41:33,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 624479244, now seen corresponding path program 1 times [2022-07-19 14:41:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:33,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373896282] [2022-07-19 14:41:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:41:33,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:33,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373896282] [2022-07-19 14:41:33,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373896282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:41:33,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124660333] [2022-07-19 14:41:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:33,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:33,292 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) [2022-07-19 14:41:33,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 14:41:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 14:41:33,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:41:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 14:41:33,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:41:33,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124660333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:41:33,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 14:41:33,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-19 14:41:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524731238] [2022-07-19 14:41:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:41:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 14:41:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 14:41:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:41:33,447 INFO L87 Difference]: Start difference. First operand 26 states and 30 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) [2022-07-19 14:41:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:33,480 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-07-19 14:41:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 14:41:33,481 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 [2022-07-19 14:41:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:33,482 INFO L225 Difference]: With dead ends: 37 [2022-07-19 14:41:33,482 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 14:41:33,482 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 [2022-07-19 14:41:33,483 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 41 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 [2022-07-19 14:41:33,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 14:41:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-07-19 14:41:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:41:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-19 14:41:33,490 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-07-19 14:41:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:33,491 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-19 14:41:33,491 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) [2022-07-19 14:41:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-19 14:41:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 14:41:33,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:33,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:33,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 14:41:33,716 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 [2022-07-19 14:41:33,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -823741135, now seen corresponding path program 1 times [2022-07-19 14:41:33,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:33,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380355631] [2022-07-19 14:41:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:33,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:41:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380355631] [2022-07-19 14:41:33,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380355631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:41:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400309640] [2022-07-19 14:41:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:33,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:33,786 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) [2022-07-19 14:41:33,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 14:41:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 14:41:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:41:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 14:41:33,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:41:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 14:41:33,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400309640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:41:33,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:41:33,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-07-19 14:41:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833354962] [2022-07-19 14:41:33,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:41:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 14:41:33,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 14:41:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 14:41:33,950 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2022-07-19 14:41:33,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:33,983 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-07-19 14:41:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 14:41:33,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 14:41:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:33,984 INFO L225 Difference]: With dead ends: 38 [2022-07-19 14:41:33,984 INFO L226 Difference]: Without dead ends: 34 [2022-07-19 14:41:33,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-19 14:41:33,985 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 64 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 [2022-07-19 14:41:33,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 64 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-19 14:41:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-19 14:41:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:41:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-07-19 14:41:33,989 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2022-07-19 14:41:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:33,990 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-07-19 14:41:33,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2022-07-19 14:41:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-07-19 14:41:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 14:41:33,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:33,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:34,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 14:41:34,206 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 [2022-07-19 14:41:34,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1350466602, now seen corresponding path program 2 times [2022-07-19 14:41:34,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:34,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098702809] [2022-07-19 14:41:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:34,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 14:41:34,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:34,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098702809] [2022-07-19 14:41:34,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098702809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:41:34,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 14:41:34,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 14:41:34,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232669845] [2022-07-19 14:41:34,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:41:34,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:41:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:41:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 14:41:34,274 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-07-19 14:41:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:34,338 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-07-19 14:41:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:41:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 27 [2022-07-19 14:41:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:34,340 INFO L225 Difference]: With dead ends: 48 [2022-07-19 14:41:34,340 INFO L226 Difference]: Without dead ends: 34 [2022-07-19 14:41:34,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 14:41:34,342 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:41:34,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 14:41:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-19 14:41:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-19 14:41:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:41:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-19 14:41:34,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2022-07-19 14:41:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:34,350 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-19 14:41:34,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-07-19 14:41:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-19 14:41:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 14:41:34,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:34,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 14:41:34,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1124171660, now seen corresponding path program 1 times [2022-07-19 14:41:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429783140] [2022-07-19 14:41:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:41:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:34,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429783140] [2022-07-19 14:41:34,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429783140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:41:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16735759] [2022-07-19 14:41:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:34,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:34,712 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) [2022-07-19 14:41:34,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 14:41:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 14:41:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:41:34,959 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:41:34,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2022-07-19 14:41:34,971 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:41:34,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2022-07-19 14:41:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 14:41:35,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 14:41:35,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16735759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 14:41:35,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 14:41:35,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2022-07-19 14:41:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685501709] [2022-07-19 14:41:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 14:41:35,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 14:41:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 14:41:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-19 14:41:35,003 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2022-07-19 14:41:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:35,021 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-07-19 14:41:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 14:41:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 33 [2022-07-19 14:41:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:35,023 INFO L225 Difference]: With dead ends: 53 [2022-07-19 14:41:35,023 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 14:41:35,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-19 14:41:35,024 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 14:41:35,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-07-19 14:41:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 14:41:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-19 14:41:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 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) [2022-07-19 14:41:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-19 14:41:35,028 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 33 [2022-07-19 14:41:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:35,029 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-19 14:41:35,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2022-07-19 14:41:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-19 14:41:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 14:41:35,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:35,030 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:35,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 14:41:35,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:35,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 441053932, now seen corresponding path program 1 times [2022-07-19 14:41:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904603901] [2022-07-19 14:41:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:35,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:41:35,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904603901] [2022-07-19 14:41:35,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904603901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:41:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539048513] [2022-07-19 14:41:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:35,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:35,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:35,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:41:35,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 14:41:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 14:41:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:41:36,033 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-07-19 14:41:36,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2022-07-19 14:41:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:36,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-07-19 14:41:36,224 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-07-19 14:41:36,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2022-07-19 14:41:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:36,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2022-07-19 14:41:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:41:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:41:36,626 INFO L356 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-07-19 14:41:36,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 351 [2022-07-19 14:41:36,685 INFO L356 Elim1Store]: treesize reduction 74, result has 33.3 percent of original size [2022-07-19 14:41:36,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 345 [2022-07-19 14:41:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 14:41:37,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539048513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 14:41:37,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 14:41:37,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-07-19 14:41:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151933298] [2022-07-19 14:41:37,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 14:41:37,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 14:41:37,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 14:41:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 14:41:37,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 14:41:37,040 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 37 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 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) [2022-07-19 14:41:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 14:41:39,584 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-07-19 14:41:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 14:41:39,585 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 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 37 [2022-07-19 14:41:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 14:41:39,586 INFO L225 Difference]: With dead ends: 73 [2022-07-19 14:41:39,586 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 14:41:39,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 14:41:39,587 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 351 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 14:41:39,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 137 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 305 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-07-19 14:41:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 14:41:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-19 14:41:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 14:41:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-19 14:41:39,604 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 37 [2022-07-19 14:41:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 14:41:39,604 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-19 14:41:39,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 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) [2022-07-19 14:41:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-19 14:41:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 14:41:39,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 14:41:39,605 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 14:41:39,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 14:41:39,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:39,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 14:41:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 14:41:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1086283439, now seen corresponding path program 2 times [2022-07-19 14:41:39,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 14:41:39,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778488826] [2022-07-19 14:41:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 14:41:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 14:41:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 14:41:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 14:41:40,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 14:41:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778488826] [2022-07-19 14:41:40,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778488826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 14:41:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897006612] [2022-07-19 14:41:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 14:41:40,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 14:41:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 14:41:40,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 14:41:40,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 14:41:40,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 14:41:40,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 14:41:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-19 14:41:40,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 14:41:40,513 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 [2022-07-19 14:41:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:40,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 14:41:40,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:40,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 14:41:40,656 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 14:41:40,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 14:41:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:40,707 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 0 case distinctions, treesize of input 16 treesize of output 21 [2022-07-19 14:41:40,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 14:41:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:40,721 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 [2022-07-19 14:41:40,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-19 14:41:40,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:40,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:41:40,780 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 14:41:40,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2022-07-19 14:41:40,790 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-07-19 14:41:41,196 INFO L356 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-07-19 14:41:41,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 77 treesize of output 40 [2022-07-19 14:41:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:41:41,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:41,209 INFO L356 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-07-19 14:41:41,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 26 [2022-07-19 14:41:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 14:41:41,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 14:41:42,888 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse7 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))) (.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse7 v_ArrVal_661)))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (let ((.cse6 (+ .cse0 4))) (let ((.cse2 (select (select .cse4 .cse5) .cse6)) (.cse3 (+ (select (select .cse1 .cse5) .cse6) 4))) (and (= (select (select .cse1 .cse2) .cse3) 0) (= (select (select .cse4 .cse2) .cse3) 0)))) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse5))))))) is different from false [2022-07-19 14:41:42,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:41:42,921 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:41:42,921 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 624 treesize of output 480 [2022-07-19 14:41:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:41:42,950 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:41:42,951 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 484 treesize of output 340 [2022-07-19 14:41:43,216 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_661 Int) (v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse9 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (let ((.cse6 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse10 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 v_ArrVal_661)))) (.cse3 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse9 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse0 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select .cse6 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse0)) (not (= (select v_arrayElimArr_4 .cse1) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_3 .cse1))) (let ((.cse7 (+ .cse2 4))) (let ((.cse4 (select (select .cse3 .cse0) .cse7)) (.cse5 (+ (select (select .cse6 .cse0) .cse7) 4))) (and (= (select (select .cse3 .cse4) .cse5) 0) (= (select (select .cse6 .cse4) .cse5) 0))))))))) is different from false [2022-07-19 14:41:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:41:45,062 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:41:45,063 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 890 treesize of output 610 [2022-07-19 14:41:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 14:41:45,078 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 14:41:45,079 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 564 treesize of output 344 [2022-07-19 14:41:45,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 14:41:45,330 INFO L356 Elim1Store]: treesize reduction 231, result has 60.6 percent of original size [2022-07-19 14:41:45,331 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 27258 treesize of output 24551 [2022-07-19 14:42:07,881 WARN L233 SmtUtils]: Spent 21.67s on a formula simplification. DAG size of input: 2335 DAG size of output: 947 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-07-19 14:42:07,886 INFO L356 Elim1Store]: treesize reduction 5161, result has 32.9 percent of original size [2022-07-19 14:42:07,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 0 disjoint index pairs (out of 561 index pairs), introduced 56 new quantified variables, introduced 561 case distinctions, treesize of input 1592333 treesize of output 1408956 [2022-07-19 14:42:15,190 WARN L233 SmtUtils]: Spent 7.29s on a formula simplification that was a NOOP. DAG size: 5051 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-19 14:42:21,904 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification that was a NOOP. DAG size: 4958 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-19 14:42:22,939 INFO L244 Elim1Store]: Index analysis took 314 ms [2022-07-19 14:42:28,903 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 475 DAG size of output: 271 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-07-19 14:42:28,905 INFO L356 Elim1Store]: treesize reduction 1711, result has 43.4 percent of original size [2022-07-19 14:42:28,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 1716081 treesize of output 1562033 [2022-07-19 14:43:56,749 WARN L233 SmtUtils]: Spent 1.46m on a formula simplification. DAG size of input: 5314 DAG size of output: 5300 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-19 14:44:05,008 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 301 DAG size of output: 297 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-07-19 14:44:05,009 INFO L356 Elim1Store]: treesize reduction 57, result has 94.5 percent of original size [2022-07-19 14:44:05,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 1617938 treesize of output 1552210 [2022-07-19 14:44:38,835 WARN L233 SmtUtils]: Spent 33.81s on a formula simplification. DAG size of input: 6051 DAG size of output: 6037 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-19 14:44:49,506 WARN L233 SmtUtils]: Spent 10.62s on a formula simplification that was a NOOP. DAG size: 6002 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-19 14:45:10,699 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification that was a NOOP. DAG size: 3866 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)