./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 20ed64ec 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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 valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ee3fbac20f2e3901a6c722d8c87f09ca9b3135c 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:27:01,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:27:01,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:27:01,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:27:01,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:27:01,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:27:01,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:27:01,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:27:01,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:27:01,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:27:01,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:27:01,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:27:01,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:27:01,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:27:01,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:27:01,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:27:01,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:27:01,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:27:01,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:27:01,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:27:01,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:27:01,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:27:01,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:27:01,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:27:01,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:27:01,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:27:01,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:27:01,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:27:01,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:27:01,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:27:01,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:27:01,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:27:01,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:27:01,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:27:01,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:27:01,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:27:01,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:27:01,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:27:01,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:27:01,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:27:01,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:27:01,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-27 04:27:01,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:27:01,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:27:01,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:27:01,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:27:01,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:27:01,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:27:01,692 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:27:01,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:27:01,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:27:01,692 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:27:01,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:27:01,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:27:01,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:27:01,693 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:27:01,693 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:27:01,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:27:01,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:27:01,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:27:01,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:27:01,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:27:01,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:27:01,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:27:01,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:27:01,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:27:01,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:27:01,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:27:01,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:27:01,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:27:01,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ee3fbac20f2e3901a6c722d8c87f09ca9b3135c [2021-08-27 04:27:01,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:27:01,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:27:01,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:27:01,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:27:01,975 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:27:01,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-08-27 04:27:02,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77aed5a6a/d21d6ebc5c304980bc8f646f6c3fbf8f/FLAG936555de3 [2021-08-27 04:27:02,438 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:27:02,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-08-27 04:27:02,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77aed5a6a/d21d6ebc5c304980bc8f646f6c3fbf8f/FLAG936555de3 [2021-08-27 04:27:02,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77aed5a6a/d21d6ebc5c304980bc8f646f6c3fbf8f [2021-08-27 04:27:02,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:27:02,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:27:02,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:27:02,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:27:02,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:27:02,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d6f553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02, skipping insertion in model container [2021-08-27 04:27:02,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:27:02,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:27:02,770 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-08-27 04:27:02,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:27:02,777 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:27:02,802 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-08-27 04:27:02,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:27:02,820 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:27:02,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02 WrapperNode [2021-08-27 04:27:02,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:27:02,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:27:02,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:27:02,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:27:02,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:27:02,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:27:02,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:27:02,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:27:02,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (1/1) ... [2021-08-27 04:27:02,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:27:02,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:02,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:27:02,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:27:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:27:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-08-27 04:27:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-08-27 04:27:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-08-27 04:27:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-08-27 04:27:02,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:27:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:27:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 04:27:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 04:27:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:27:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:27:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:27:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:27:02,915 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:27:02,916 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:27:02,917 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:27:02,918 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:27:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:27:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:27:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:27:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:27:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:27:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:27:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:27:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:27:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:27:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:27:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-08-27 04:27:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 04:27:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:27:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:27:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:27:03,251 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 04:27:03,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:27:03,444 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-27 04:27:03,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:27:03 BoogieIcfgContainer [2021-08-27 04:27:03,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:27:03,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:27:03,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:27:03,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:27:03,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:27:02" (1/3) ... [2021-08-27 04:27:03,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e273f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:27:03, skipping insertion in model container [2021-08-27 04:27:03,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:27:02" (2/3) ... [2021-08-27 04:27:03,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e273f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:27:03, skipping insertion in model container [2021-08-27 04:27:03,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:27:03" (3/3) ... [2021-08-27 04:27:03,450 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-08-27 04:27:03,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:27:03,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-08-27 04:27:03,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:27:03,481 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:27:03,481 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-08-27 04:27:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 04:27:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 04:27:03,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:03,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:03,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1660292181, now seen corresponding path program 1 times [2021-08-27 04:27:03,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:03,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390405421] [2021-08-27 04:27:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:03,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:03,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:03,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390405421] [2021-08-27 04:27:03,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390405421] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:03,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:03,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:27:03,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624643194] [2021-08-27 04:27:03,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 04:27:03,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 04:27:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:27:03,649 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:03,790 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-08-27 04:27:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:27:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-08-27 04:27:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:03,799 INFO L225 Difference]: With dead ends: 124 [2021-08-27 04:27:03,799 INFO L226 Difference]: Without dead ends: 117 [2021-08-27 04:27:03,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:27:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-27 04:27:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2021-08-27 04:27:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 83 states have internal predecessors, (92), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 04:27:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-08-27 04:27:03,840 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 18 [2021-08-27 04:27:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:03,840 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-08-27 04:27:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-08-27 04:27:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:27:03,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:03,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:27:03,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:03,844 INFO L82 PathProgramCache]: Analyzing trace with hash -189324830, now seen corresponding path program 1 times [2021-08-27 04:27:03,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:03,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729048176] [2021-08-27 04:27:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:03,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:03,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:03,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:03,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729048176] [2021-08-27 04:27:03,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729048176] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:03,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:03,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:27:03,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849689242] [2021-08-27 04:27:03,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:27:03,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:03,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:27:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:27:03,959 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:04,141 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-08-27 04:27:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:27:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-08-27 04:27:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:04,146 INFO L225 Difference]: With dead ends: 116 [2021-08-27 04:27:04,147 INFO L226 Difference]: Without dead ends: 116 [2021-08-27 04:27:04,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:27:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-27 04:27:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-08-27 04:27:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 82 states have internal predecessors, (91), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 04:27:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-08-27 04:27:04,162 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 20 [2021-08-27 04:27:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:04,164 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-08-27 04:27:04,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-08-27 04:27:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:27:04,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:04,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:27:04,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -189324829, now seen corresponding path program 1 times [2021-08-27 04:27:04,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:04,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797134391] [2021-08-27 04:27:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:04,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:04,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:04,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797134391] [2021-08-27 04:27:04,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797134391] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:04,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:04,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:27:04,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288515421] [2021-08-27 04:27:04,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:27:04,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:27:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:27:04,379 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:04,733 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-08-27 04:27:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:27:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-08-27 04:27:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:04,735 INFO L225 Difference]: With dead ends: 135 [2021-08-27 04:27:04,735 INFO L226 Difference]: Without dead ends: 135 [2021-08-27 04:27:04,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:27:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-27 04:27:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2021-08-27 04:27:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 04:27:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-08-27 04:27:04,740 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 20 [2021-08-27 04:27:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:04,740 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-08-27 04:27:04,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-08-27 04:27:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:27:04,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:04,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:04,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:27:04,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:04,742 INFO L82 PathProgramCache]: Analyzing trace with hash -447490267, now seen corresponding path program 1 times [2021-08-27 04:27:04,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:04,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797413340] [2021-08-27 04:27:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:04,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:04,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:04,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797413340] [2021-08-27 04:27:04,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797413340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:04,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:04,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:27:04,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282140804] [2021-08-27 04:27:04,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:27:04,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:27:04,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:27:04,792 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:04,933 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-08-27 04:27:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:27:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-08-27 04:27:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:04,934 INFO L225 Difference]: With dead ends: 124 [2021-08-27 04:27:04,934 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 04:27:04,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:27:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 04:27:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-08-27 04:27:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 89 states have internal predecessors, (101), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 04:27:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-08-27 04:27:04,938 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 20 [2021-08-27 04:27:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:04,939 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-08-27 04:27:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:27:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-08-27 04:27:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:27:04,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:04,940 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:04,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:27:04,940 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2077322707, now seen corresponding path program 1 times [2021-08-27 04:27:04,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:04,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662867590] [2021-08-27 04:27:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:04,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 04:27:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:27:05,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:05,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662867590] [2021-08-27 04:27:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662867590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186163630] [2021-08-27 04:27:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:05,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:05,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:05,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:27:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 04:27:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:05,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186163630] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:05,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:27:05,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-08-27 04:27:05,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897668748] [2021-08-27 04:27:05,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:27:05,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:27:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:27:05,423 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:27:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:05,573 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2021-08-27 04:27:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:27:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-08-27 04:27:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:05,575 INFO L225 Difference]: With dead ends: 135 [2021-08-27 04:27:05,575 INFO L226 Difference]: Without dead ends: 135 [2021-08-27 04:27:05,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:27:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-27 04:27:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2021-08-27 04:27:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 98 states have internal predecessors, (114), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 04:27:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-08-27 04:27:05,581 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 35 [2021-08-27 04:27:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:05,581 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-08-27 04:27:05,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:27:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-08-27 04:27:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:27:05,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:05,583 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:05,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:05,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:05,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2077322706, now seen corresponding path program 1 times [2021-08-27 04:27:05,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:05,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634707705] [2021-08-27 04:27:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:05,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 04:27:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:27:05,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:05,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634707705] [2021-08-27 04:27:05,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634707705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:05,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671768012] [2021-08-27 04:27:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:05,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:05,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:05,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:05,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:27:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 04:27:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:06,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671768012] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:06,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:27:06,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-08-27 04:27:06,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332190892] [2021-08-27 04:27:06,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:27:06,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:27:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:27:06,308 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 04:27:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:06,366 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2021-08-27 04:27:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:27:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-08-27 04:27:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:06,368 INFO L225 Difference]: With dead ends: 110 [2021-08-27 04:27:06,368 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 04:27:06,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:27:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 04:27:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-08-27 04:27:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 04:27:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-08-27 04:27:06,374 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 35 [2021-08-27 04:27:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:06,375 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-08-27 04:27:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 04:27:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-08-27 04:27:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 04:27:06,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:06,381 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:06,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-27 04:27:06,599 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash -646752834, now seen corresponding path program 1 times [2021-08-27 04:27:06,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:06,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891241193] [2021-08-27 04:27:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:06,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:06,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:06,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:06,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:06,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-08-27 04:27:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 04:27:06,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:06,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891241193] [2021-08-27 04:27:06,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891241193] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:06,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:06,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:27:06,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665813527] [2021-08-27 04:27:06,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:27:06,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:27:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:27:06,719 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 04:27:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:07,134 INFO L93 Difference]: Finished difference Result 155 states and 177 transitions. [2021-08-27 04:27:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:27:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-08-27 04:27:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:07,137 INFO L225 Difference]: With dead ends: 155 [2021-08-27 04:27:07,137 INFO L226 Difference]: Without dead ends: 149 [2021-08-27 04:27:07,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:27:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-27 04:27:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-08-27 04:27:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.435897435897436) internal successors, (112), 99 states have internal predecessors, (112), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-08-27 04:27:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-08-27 04:27:07,144 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 40 [2021-08-27 04:27:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:07,145 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-08-27 04:27:07,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 04:27:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-08-27 04:27:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 04:27:07,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:07,147 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:07,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:27:07,147 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash -646750912, now seen corresponding path program 1 times [2021-08-27 04:27:07,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:07,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606499900] [2021-08-27 04:27:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:07,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-08-27 04:27:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:27:07,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:07,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606499900] [2021-08-27 04:27:07,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606499900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:07,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413257465] [2021-08-27 04:27:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:07,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:07,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:07,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:27:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 04:27:07,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413257465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:07,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:07,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-08-27 04:27:07,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99002215] [2021-08-27 04:27:07,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:27:07,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:27:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:27:07,621 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 04:27:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:08,350 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2021-08-27 04:27:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:27:08,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2021-08-27 04:27:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:08,352 INFO L225 Difference]: With dead ends: 172 [2021-08-27 04:27:08,352 INFO L226 Difference]: Without dead ends: 169 [2021-08-27 04:27:08,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 442.2ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:27:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-27 04:27:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2021-08-27 04:27:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 104 states have internal predecessors, (117), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-08-27 04:27:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-08-27 04:27:08,359 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 40 [2021-08-27 04:27:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:08,360 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-08-27 04:27:08,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 04:27:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-08-27 04:27:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:27:08,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:08,361 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:08,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:08,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:08,578 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash -417387441, now seen corresponding path program 2 times [2021-08-27 04:27:08,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:08,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006547487] [2021-08-27 04:27:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:08,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:08,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:08,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 04:27:08,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:08,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006547487] [2021-08-27 04:27:08,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006547487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:08,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136567885] [2021-08-27 04:27:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:27:08,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:08,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:08,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:27:08,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:27:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:27:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:27:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 04:27:09,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136567885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:09,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:09,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-27 04:27:09,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348131886] [2021-08-27 04:27:09,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:27:09,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:27:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:27:09,158 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 04:27:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:10,703 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-08-27 04:27:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:27:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-08-27 04:27:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:10,705 INFO L225 Difference]: With dead ends: 179 [2021-08-27 04:27:10,705 INFO L226 Difference]: Without dead ends: 179 [2021-08-27 04:27:10,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1133.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:27:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-27 04:27:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 128. [2021-08-27 04:27:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.4090909090909092) internal successors, (124), 110 states have internal predecessors, (124), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-08-27 04:27:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-08-27 04:27:10,709 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 45 [2021-08-27 04:27:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:10,710 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-08-27 04:27:10,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 04:27:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-08-27 04:27:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:27:10,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:10,711 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:10,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:10,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:10,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:10,928 INFO L82 PathProgramCache]: Analyzing trace with hash -24360431, now seen corresponding path program 1 times [2021-08-27 04:27:10,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:10,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732109978] [2021-08-27 04:27:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:10,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:10,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:11,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:11,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:11,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:27:11,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:11,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732109978] [2021-08-27 04:27:11,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732109978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:11,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225754765] [2021-08-27 04:27:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:11,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:11,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:11,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:27:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 04:27:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:11,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:11,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-08-27 04:27:11,855 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-08-27 04:27:11,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 31 [2021-08-27 04:27:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:12,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225754765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:12,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:12,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-08-27 04:27:12,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901191599] [2021-08-27 04:27:12,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:27:12,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:27:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:27:12,143 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:27:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:12,858 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2021-08-27 04:27:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:27:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-08-27 04:27:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:12,859 INFO L225 Difference]: With dead ends: 242 [2021-08-27 04:27:12,859 INFO L226 Difference]: Without dead ends: 242 [2021-08-27 04:27:12,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:27:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-27 04:27:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2021-08-27 04:27:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.4233576642335766) internal successors, (195), 160 states have internal predecessors, (195), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-08-27 04:27:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2021-08-27 04:27:12,863 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 45 [2021-08-27 04:27:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:12,864 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2021-08-27 04:27:12,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:27:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2021-08-27 04:27:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:27:12,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:12,864 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:12,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:13,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-27 04:27:13,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash -24360430, now seen corresponding path program 1 times [2021-08-27 04:27:13,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:13,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296607602] [2021-08-27 04:27:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:13,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:27:13,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:13,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296607602] [2021-08-27 04:27:13,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296607602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:13,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105978471] [2021-08-27 04:27:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:13,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:13,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:13,302 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) [2021-08-27 04:27:13,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:27:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 04:27:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:13,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:13,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-08-27 04:27:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-08-27 04:27:13,873 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 04:27:13,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2021-08-27 04:27:13,879 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:27:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-08-27 04:27:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105978471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:14,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-08-27 04:27:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077935327] [2021-08-27 04:27:14,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:27:14,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:27:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:27:14,160 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 04:27:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:14,915 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2021-08-27 04:27:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:27:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2021-08-27 04:27:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:14,916 INFO L225 Difference]: With dead ends: 255 [2021-08-27 04:27:14,916 INFO L226 Difference]: Without dead ends: 255 [2021-08-27 04:27:14,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:27:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-27 04:27:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 196. [2021-08-27 04:27:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 146 states have (on average 1.417808219178082) internal successors, (207), 169 states have internal predecessors, (207), 13 states have call successors, (13), 11 states have call predecessors, (13), 15 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2021-08-27 04:27:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2021-08-27 04:27:14,921 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 45 [2021-08-27 04:27:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2021-08-27 04:27:14,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 04:27:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2021-08-27 04:27:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:27:14,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:14,922 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:14,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:15,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:15,137 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -325262371, now seen corresponding path program 1 times [2021-08-27 04:27:15,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:15,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745042349] [2021-08-27 04:27:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:15,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-27 04:27:15,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:15,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745042349] [2021-08-27 04:27:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745042349] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:15,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:15,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:27:15,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226286161] [2021-08-27 04:27:15,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:27:15,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:15,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:27:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:27:15,273 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:27:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:15,832 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-08-27 04:27:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:27:15,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-08-27 04:27:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:15,834 INFO L225 Difference]: With dead ends: 267 [2021-08-27 04:27:15,834 INFO L226 Difference]: Without dead ends: 267 [2021-08-27 04:27:15,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:27:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-27 04:27:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 226. [2021-08-27 04:27:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.447674418604651) internal successors, (249), 197 states have internal predecessors, (249), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-08-27 04:27:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2021-08-27 04:27:15,839 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 49 [2021-08-27 04:27:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:15,840 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2021-08-27 04:27:15,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:27:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2021-08-27 04:27:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:27:15,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:15,840 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:15,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 04:27:15,841 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -325262370, now seen corresponding path program 1 times [2021-08-27 04:27:15,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:15,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894514442] [2021-08-27 04:27:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:15,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 04:27:15,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:15,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894514442] [2021-08-27 04:27:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894514442] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:15,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:15,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:27:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732992757] [2021-08-27 04:27:15,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:27:15,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:27:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:27:15,977 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:27:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:16,556 INFO L93 Difference]: Finished difference Result 268 states and 333 transitions. [2021-08-27 04:27:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:27:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-08-27 04:27:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:16,558 INFO L225 Difference]: With dead ends: 268 [2021-08-27 04:27:16,558 INFO L226 Difference]: Without dead ends: 268 [2021-08-27 04:27:16,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:27:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-27 04:27:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 226. [2021-08-27 04:27:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.436046511627907) internal successors, (247), 197 states have internal predecessors, (247), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-08-27 04:27:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2021-08-27 04:27:16,566 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 49 [2021-08-27 04:27:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:16,566 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2021-08-27 04:27:16,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:27:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2021-08-27 04:27:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:27:16,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:16,567 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:16,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:27:16,568 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash 411208802, now seen corresponding path program 2 times [2021-08-27 04:27:16,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:16,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119077343] [2021-08-27 04:27:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:16,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:16,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:16,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:16,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-27 04:27:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:27:16,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:16,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119077343] [2021-08-27 04:27:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119077343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:16,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015426973] [2021-08-27 04:27:16,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:27:16,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:16,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:16,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:27:16,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:27:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:27:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:27:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:17,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015426973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:17,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:17,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-08-27 04:27:17,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779006774] [2021-08-27 04:27:17,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:27:17,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:27:17,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:27:17,170 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 04:27:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:18,022 INFO L93 Difference]: Finished difference Result 284 states and 360 transitions. [2021-08-27 04:27:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:27:18,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-08-27 04:27:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:18,027 INFO L225 Difference]: With dead ends: 284 [2021-08-27 04:27:18,027 INFO L226 Difference]: Without dead ends: 284 [2021-08-27 04:27:18,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:27:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-27 04:27:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-08-27 04:27:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 176 states have (on average 1.4318181818181819) internal successors, (252), 202 states have internal predecessors, (252), 16 states have call successors, (16), 13 states have call predecessors, (16), 18 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-08-27 04:27:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2021-08-27 04:27:18,058 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 50 [2021-08-27 04:27:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:18,058 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2021-08-27 04:27:18,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 04:27:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2021-08-27 04:27:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:27:18,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:18,059 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:18,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:18,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:18,273 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -445053959, now seen corresponding path program 1 times [2021-08-27 04:27:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:18,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851566445] [2021-08-27 04:27:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:18,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:27:18,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:18,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851566445] [2021-08-27 04:27:18,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851566445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:18,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607700810] [2021-08-27 04:27:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:18,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:18,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:18,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:27:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:27:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:18,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:18,820 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:27:18,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 04:27:18,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-27 04:27:19,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-27 04:27:19,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:27:19,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-08-27 04:27:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:19,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607700810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:19,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:19,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-27 04:27:19,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089092638] [2021-08-27 04:27:19,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:27:19,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:27:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:27:19,352 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:27:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:20,844 INFO L93 Difference]: Finished difference Result 365 states and 449 transitions. [2021-08-27 04:27:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:27:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-08-27 04:27:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:20,845 INFO L225 Difference]: With dead ends: 365 [2021-08-27 04:27:20,845 INFO L226 Difference]: Without dead ends: 365 [2021-08-27 04:27:20,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:27:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-27 04:27:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 254. [2021-08-27 04:27:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4329896907216495) internal successors, (278), 222 states have internal predecessors, (278), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-08-27 04:27:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 321 transitions. [2021-08-27 04:27:20,851 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 321 transitions. Word has length 52 [2021-08-27 04:27:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:20,852 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 321 transitions. [2021-08-27 04:27:20,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:27:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 321 transitions. [2021-08-27 04:27:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:27:20,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:20,853 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:20,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-27 04:27:21,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 04:27:21,065 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash -445053958, now seen corresponding path program 1 times [2021-08-27 04:27:21,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:21,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887958294] [2021-08-27 04:27:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:21,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:21,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:21,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:21,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:27:21,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:21,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887958294] [2021-08-27 04:27:21,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887958294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:21,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814369952] [2021-08-27 04:27:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:21,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:21,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:21,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:21,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:27:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 04:27:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:21,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:21,791 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:27:21,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-08-27 04:27:21,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:27:21,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 04:27:21,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:27:21,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 04:27:22,746 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-08-27 04:27:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 62 [2021-08-27 04:27:22,755 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-27 04:27:22,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2021-08-27 04:27:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:22,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814369952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:22,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:22,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2021-08-27 04:27:22,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478814420] [2021-08-27 04:27:22,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:27:22,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:27:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:27:22,899 INFO L87 Difference]: Start difference. First operand 254 states and 321 transitions. Second operand has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:27:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:25,876 INFO L93 Difference]: Finished difference Result 355 states and 429 transitions. [2021-08-27 04:27:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:27:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-08-27 04:27:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:25,878 INFO L225 Difference]: With dead ends: 355 [2021-08-27 04:27:25,878 INFO L226 Difference]: Without dead ends: 355 [2021-08-27 04:27:25,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1552.1ms TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:27:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-27 04:27:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 254. [2021-08-27 04:27:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.422680412371134) internal successors, (276), 222 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-08-27 04:27:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 319 transitions. [2021-08-27 04:27:25,884 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 319 transitions. Word has length 52 [2021-08-27 04:27:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:25,884 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 319 transitions. [2021-08-27 04:27:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:27:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 319 transitions. [2021-08-27 04:27:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-27 04:27:25,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:25,884 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:25,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:26,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 04:27:26,085 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash 235136172, now seen corresponding path program 1 times [2021-08-27 04:27:26,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:26,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223057522] [2021-08-27 04:27:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:26,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 04:27:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 04:27:26,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:26,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223057522] [2021-08-27 04:27:26,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223057522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:27:26,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:27:26,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 04:27:26,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529563559] [2021-08-27 04:27:26,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:27:26,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:27:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:27:26,195 INFO L87 Difference]: Start difference. First operand 254 states and 319 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 04:27:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:26,653 INFO L93 Difference]: Finished difference Result 304 states and 375 transitions. [2021-08-27 04:27:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:27:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-08-27 04:27:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:26,655 INFO L225 Difference]: With dead ends: 304 [2021-08-27 04:27:26,655 INFO L226 Difference]: Without dead ends: 298 [2021-08-27 04:27:26,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:27:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-27 04:27:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2021-08-27 04:27:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4123711340206186) internal successors, (274), 222 states have internal predecessors, (274), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-08-27 04:27:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2021-08-27 04:27:26,660 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 54 [2021-08-27 04:27:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:26,661 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2021-08-27 04:27:26,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 04:27:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2021-08-27 04:27:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 04:27:26,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:26,661 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:26,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:27:26,662 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:26,662 INFO L82 PathProgramCache]: Analyzing trace with hash 916653259, now seen corresponding path program 1 times [2021-08-27 04:27:26,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:26,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817365151] [2021-08-27 04:27:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:26,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 04:27:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 04:27:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 04:27:26,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:26,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817365151] [2021-08-27 04:27:26,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817365151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:26,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343111101] [2021-08-27 04:27:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:26,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:26,777 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:26,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:27:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 04:27:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 04:27:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343111101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:27,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:27,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-27 04:27:27,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634469562] [2021-08-27 04:27:27,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:27:27,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:27:27,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:27:27,369 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-27 04:27:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:28,232 INFO L93 Difference]: Finished difference Result 391 states and 498 transitions. [2021-08-27 04:27:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:27:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-08-27 04:27:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:28,233 INFO L225 Difference]: With dead ends: 391 [2021-08-27 04:27:28,234 INFO L226 Difference]: Without dead ends: 381 [2021-08-27 04:27:28,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:27:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-27 04:27:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 256. [2021-08-27 04:27:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 224 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-08-27 04:27:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 319 transitions. [2021-08-27 04:27:28,253 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 319 transitions. Word has length 53 [2021-08-27 04:27:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:28,253 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 319 transitions. [2021-08-27 04:27:28,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-27 04:27:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 319 transitions. [2021-08-27 04:27:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 04:27:28,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:28,261 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:28,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:28,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 04:27:28,481 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 668506765, now seen corresponding path program 1 times [2021-08-27 04:27:28,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:28,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579510001] [2021-08-27 04:27:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:28,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:28,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:28,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:28,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 04:27:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 04:27:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 04:27:28,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:28,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579510001] [2021-08-27 04:27:28,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579510001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:28,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963278074] [2021-08-27 04:27:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:28,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:28,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:28,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:29,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:27:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:27:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:29,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:29,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-08-27 04:27:29,864 INFO L354 Elim1Store]: treesize reduction 97, result has 17.1 percent of original size [2021-08-27 04:27:29,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-08-27 04:27:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 04:27:30,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963278074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:30,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:30,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2021-08-27 04:27:30,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419896866] [2021-08-27 04:27:30,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:27:30,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:27:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:27:30,122 INFO L87 Difference]: Start difference. First operand 256 states and 319 transitions. Second operand has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:27:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:31,712 INFO L93 Difference]: Finished difference Result 404 states and 496 transitions. [2021-08-27 04:27:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:27:31,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-08-27 04:27:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:31,715 INFO L225 Difference]: With dead ends: 404 [2021-08-27 04:27:31,715 INFO L226 Difference]: Without dead ends: 404 [2021-08-27 04:27:31,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:27:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-27 04:27:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 326. [2021-08-27 04:27:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 256 states have (on average 1.41796875) internal successors, (363), 286 states have internal predecessors, (363), 22 states have call successors, (22), 18 states have call predecessors, (22), 26 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33) [2021-08-27 04:27:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 418 transitions. [2021-08-27 04:27:31,731 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 418 transitions. Word has length 53 [2021-08-27 04:27:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:31,731 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 418 transitions. [2021-08-27 04:27:31,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:27:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 418 transitions. [2021-08-27 04:27:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 04:27:31,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:31,733 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:31,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:31,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:31,952 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash 668506766, now seen corresponding path program 1 times [2021-08-27 04:27:31,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:31,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640479073] [2021-08-27 04:27:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:31,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:32,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 04:27:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:32,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 04:27:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 04:27:32,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:32,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640479073] [2021-08-27 04:27:32,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640479073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:32,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893582832] [2021-08-27 04:27:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:32,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:32,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:32,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:27:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 04:27:32,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:32,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:33,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-08-27 04:27:35,197 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_12 Int) (v_sll_create_~new_head~0.base_13 Int)) (and (< v_sll_create_~new_head~0.base_12 |c_#StackHeapBarrier|) (= |c_#length| (store (store (store |c_old(#length)| v_sll_create_~new_head~0.base_12 4) v_sll_create_~new_head~0.base_13 4) sll_create_~new_head~0.base 4)))))) is different from true [2021-08-27 04:27:35,454 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-08-27 04:27:35,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 34 [2021-08-27 04:27:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2021-08-27 04:27:35,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893582832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:35,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:35,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-08-27 04:27:35,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262052325] [2021-08-27 04:27:35,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:27:35,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:27:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=243, Unknown=1, NotChecked=32, Total=342 [2021-08-27 04:27:35,732 INFO L87 Difference]: Start difference. First operand 326 states and 418 transitions. Second operand has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 04:27:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:36,886 INFO L93 Difference]: Finished difference Result 409 states and 496 transitions. [2021-08-27 04:27:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:27:36,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2021-08-27 04:27:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:36,888 INFO L225 Difference]: With dead ends: 409 [2021-08-27 04:27:36,889 INFO L226 Difference]: Without dead ends: 409 [2021-08-27 04:27:36,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2731.3ms TimeCoverageRelationStatistics Valid=144, Invalid=615, Unknown=1, NotChecked=52, Total=812 [2021-08-27 04:27:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-27 04:27:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 264. [2021-08-27 04:27:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 203 states have (on average 1.3990147783251232) internal successors, (284), 232 states have internal predecessors, (284), 18 states have call successors, (18), 15 states have call predecessors, (18), 21 states have return successors, (26), 16 states have call predecessors, (26), 17 states have call successors, (26) [2021-08-27 04:27:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2021-08-27 04:27:36,897 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 53 [2021-08-27 04:27:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:36,897 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2021-08-27 04:27:36,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 04:27:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2021-08-27 04:27:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:27:36,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:36,900 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:36,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:37,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:37,118 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash -38429091, now seen corresponding path program 2 times [2021-08-27 04:27:37,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:37,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326017953] [2021-08-27 04:27:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:37,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:37,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:37,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:37,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:37,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:27:37,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326017953] [2021-08-27 04:27:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326017953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573816103] [2021-08-27 04:27:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:27:37,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:37,577 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:37,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:27:38,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:27:38,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:27:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-27 04:27:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:38,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:38,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 04:27:38,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 04:27:38,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:27:38,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 04:27:38,573 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 04:27:38,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-27 04:27:38,583 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-27 04:27:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-27 04:27:39,666 INFO L354 Elim1Store]: treesize reduction 97, result has 24.8 percent of original size [2021-08-27 04:27:39,666 INFO L388 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 98 [2021-08-27 04:27:39,692 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-08-27 04:27:39,696 INFO L388 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 53 [2021-08-27 04:27:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:39,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573816103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:39,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:39,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-08-27 04:27:39,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481605368] [2021-08-27 04:27:39,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:27:39,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:27:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:27:39,718 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:27:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:48,671 INFO L93 Difference]: Finished difference Result 377 states and 456 transitions. [2021-08-27 04:27:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 04:27:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-08-27 04:27:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:48,673 INFO L225 Difference]: With dead ends: 377 [2021-08-27 04:27:48,673 INFO L226 Difference]: Without dead ends: 377 [2021-08-27 04:27:48,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1554.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:27:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-27 04:27:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 307. [2021-08-27 04:27:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3765690376569037) internal successors, (329), 270 states have internal predecessors, (329), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-08-27 04:27:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 382 transitions. [2021-08-27 04:27:48,680 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 382 transitions. Word has length 55 [2021-08-27 04:27:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:48,681 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 382 transitions. [2021-08-27 04:27:48,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:27:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 382 transitions. [2021-08-27 04:27:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 04:27:48,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:48,686 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:48,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 04:27:48,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-27 04:27:48,905 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:27:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 159610384, now seen corresponding path program 1 times [2021-08-27 04:27:48,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:48,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019738312] [2021-08-27 04:27:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:48,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:48,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:48,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:27:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:27:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:49,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:27:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:49,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 04:27:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:27:49,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:49,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019738312] [2021-08-27 04:27:49,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019738312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:49,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343868033] [2021-08-27 04:27:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:49,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:49,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:49,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:27:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:49,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:27:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:49,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:27:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-27 04:27:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:52,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343868033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:52,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:52,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-08-27 04:27:52,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621173932] [2021-08-27 04:27:52,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:27:52,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:27:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2021-08-27 04:27:52,345 INFO L87 Difference]: Start difference. First operand 307 states and 382 transitions. Second operand has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-27 04:29:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:30,781 INFO L93 Difference]: Finished difference Result 433 states and 522 transitions. [2021-08-27 04:29:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:29:30,782 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2021-08-27 04:29:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:30,784 INFO L225 Difference]: With dead ends: 433 [2021-08-27 04:29:30,784 INFO L226 Difference]: Without dead ends: 424 [2021-08-27 04:29:30,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 9136.0ms TimeCoverageRelationStatistics Valid=286, Invalid=2160, Unknown=4, NotChecked=0, Total=2450 [2021-08-27 04:29:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-27 04:29:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 307. [2021-08-27 04:29:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3640167364016735) internal successors, (326), 270 states have internal predecessors, (326), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-08-27 04:29:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2021-08-27 04:29:30,791 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 57 [2021-08-27 04:29:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:30,791 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2021-08-27 04:29:30,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-27 04:29:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2021-08-27 04:29:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 04:29:30,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:30,792 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:30,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:30,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:30,998 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:30,998 INFO L82 PathProgramCache]: Analyzing trace with hash 906045798, now seen corresponding path program 2 times [2021-08-27 04:29:30,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:30,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957432465] [2021-08-27 04:29:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:30,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:31,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:31,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 04:29:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:31,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 04:29:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:29:31,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:31,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957432465] [2021-08-27 04:29:31,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957432465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:31,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342984388] [2021-08-27 04:29:31,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:29:31,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:31,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:31,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:31,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:29:32,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:29:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 04:29:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:29:32,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342984388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:32,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:32,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 20 [2021-08-27 04:29:32,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709239173] [2021-08-27 04:29:32,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:29:32,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:29:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:29:32,214 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:29:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:33,160 INFO L93 Difference]: Finished difference Result 443 states and 577 transitions. [2021-08-27 04:29:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:29:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 58 [2021-08-27 04:29:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:33,171 INFO L225 Difference]: With dead ends: 443 [2021-08-27 04:29:33,171 INFO L226 Difference]: Without dead ends: 443 [2021-08-27 04:29:33,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:29:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-27 04:29:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 313. [2021-08-27 04:29:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 243 states have (on average 1.3621399176954732) internal successors, (331), 275 states have internal predecessors, (331), 22 states have call successors, (22), 17 states have call predecessors, (22), 26 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2021-08-27 04:29:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 388 transitions. [2021-08-27 04:29:33,181 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 388 transitions. Word has length 58 [2021-08-27 04:29:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:33,181 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 388 transitions. [2021-08-27 04:29:33,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 04:29:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 388 transitions. [2021-08-27 04:29:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-27 04:29:33,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:33,182 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:33,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:33,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:33,397 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash 733723180, now seen corresponding path program 2 times [2021-08-27 04:29:33,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:33,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837615240] [2021-08-27 04:29:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:33,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:33,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:33,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:33,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:29:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:33,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:29:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:33,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 04:29:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 04:29:33,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:33,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837615240] [2021-08-27 04:29:33,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837615240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:33,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137571925] [2021-08-27 04:29:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:29:33,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:33,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:33,629 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:29:34,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:29:34,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:29:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 04:29:34,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137571925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:34,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:34,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2021-08-27 04:29:34,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750235185] [2021-08-27 04:29:34,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:29:34,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:29:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:29:34,556 INFO L87 Difference]: Start difference. First operand 313 states and 388 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 04:29:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:35,312 INFO L93 Difference]: Finished difference Result 438 states and 554 transitions. [2021-08-27 04:29:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:29:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2021-08-27 04:29:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:35,317 INFO L225 Difference]: With dead ends: 438 [2021-08-27 04:29:35,317 INFO L226 Difference]: Without dead ends: 438 [2021-08-27 04:29:35,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:29:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-27 04:29:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-08-27 04:29:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 251 states have (on average 1.350597609561753) internal successors, (339), 282 states have internal predecessors, (339), 24 states have call successors, (24), 17 states have call predecessors, (24), 26 states have return successors, (38), 23 states have call predecessors, (38), 23 states have call successors, (38) [2021-08-27 04:29:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2021-08-27 04:29:35,343 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 60 [2021-08-27 04:29:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:35,343 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2021-08-27 04:29:35,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 04:29:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2021-08-27 04:29:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:29:35,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:35,344 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:35,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-27 04:29:35,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 04:29:35,549 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash -576100065, now seen corresponding path program 1 times [2021-08-27 04:29:35,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:35,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050740401] [2021-08-27 04:29:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:35,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:35,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:29:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:29:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:35,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-08-27 04:29:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:29:35,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:35,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050740401] [2021-08-27 04:29:35,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050740401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:35,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455568666] [2021-08-27 04:29:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:35,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:35,737 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:35,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:29:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:36,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:29:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:29:36,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455568666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:36,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:36,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-27 04:29:36,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570350903] [2021-08-27 04:29:36,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 04:29:36,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 04:29:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:29:36,656 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-27 04:29:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:38,105 INFO L93 Difference]: Finished difference Result 419 states and 515 transitions. [2021-08-27 04:29:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:29:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-08-27 04:29:38,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:38,106 INFO L225 Difference]: With dead ends: 419 [2021-08-27 04:29:38,106 INFO L226 Difference]: Without dead ends: 369 [2021-08-27 04:29:38,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:29:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-27 04:29:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 309. [2021-08-27 04:29:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 268 states have internal predecessors, (319), 24 states have call successors, (24), 17 states have call predecessors, (24), 23 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2021-08-27 04:29:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 378 transitions. [2021-08-27 04:29:38,112 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 378 transitions. Word has length 61 [2021-08-27 04:29:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 378 transitions. [2021-08-27 04:29:38,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-27 04:29:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 378 transitions. [2021-08-27 04:29:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:29:38,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:38,114 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:38,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:38,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:38,349 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1277164643, now seen corresponding path program 2 times [2021-08-27 04:29:38,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:38,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395492444] [2021-08-27 04:29:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:38,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:38,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:38,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:38,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:29:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:38,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:29:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:38,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-08-27 04:29:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-27 04:29:38,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:38,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395492444] [2021-08-27 04:29:38,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395492444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:38,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472014059] [2021-08-27 04:29:38,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:29:38,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:38,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:38,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:29:39,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:29:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:39,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 04:29:39,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:29:39,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-08-27 04:29:39,521 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 04:29:39,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 24 [2021-08-27 04:29:40,088 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-08-27 04:29:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-08-27 04:29:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 04:29:40,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472014059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:40,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:40,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-08-27 04:29:40,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263721699] [2021-08-27 04:29:40,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:29:40,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:29:40,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:29:40,145 INFO L87 Difference]: Start difference. First operand 309 states and 378 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-27 04:29:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:41,353 INFO L93 Difference]: Finished difference Result 394 states and 472 transitions. [2021-08-27 04:29:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:29:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2021-08-27 04:29:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:41,355 INFO L225 Difference]: With dead ends: 394 [2021-08-27 04:29:41,355 INFO L226 Difference]: Without dead ends: 394 [2021-08-27 04:29:41,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:29:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-27 04:29:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 339. [2021-08-27 04:29:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3408239700374531) internal successors, (358), 294 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-08-27 04:29:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2021-08-27 04:29:41,361 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 61 [2021-08-27 04:29:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:41,362 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2021-08-27 04:29:41,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-27 04:29:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2021-08-27 04:29:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:29:41,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:41,362 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:41,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:41,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:41,563 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_insertErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:41,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1277164642, now seen corresponding path program 1 times [2021-08-27 04:29:41,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:41,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057127150] [2021-08-27 04:29:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:41,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:29:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:29:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-08-27 04:29:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-27 04:29:41,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:41,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057127150] [2021-08-27 04:29:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057127150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:41,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427377008] [2021-08-27 04:29:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:41,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:41,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:41,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:29:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 04:29:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:42,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:29:42,662 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 04:29:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 19 [2021-08-27 04:29:42,858 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:29:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 04:29:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 04:29:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427377008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:42,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:42,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2021-08-27 04:29:42,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219244639] [2021-08-27 04:29:42,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:29:42,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:29:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:29:42,878 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-27 04:29:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:43,668 INFO L93 Difference]: Finished difference Result 369 states and 447 transitions. [2021-08-27 04:29:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:29:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2021-08-27 04:29:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:43,670 INFO L225 Difference]: With dead ends: 369 [2021-08-27 04:29:43,670 INFO L226 Difference]: Without dead ends: 369 [2021-08-27 04:29:43,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:29:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-27 04:29:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 339. [2021-08-27 04:29:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3333333333333333) internal successors, (356), 294 states have internal predecessors, (356), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-08-27 04:29:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 419 transitions. [2021-08-27 04:29:43,676 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 419 transitions. Word has length 61 [2021-08-27 04:29:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:43,676 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 419 transitions. [2021-08-27 04:29:43,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-27 04:29:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 419 transitions. [2021-08-27 04:29:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:29:43,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:43,677 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:43,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:43,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:43,897 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash 534522131, now seen corresponding path program 2 times [2021-08-27 04:29:43,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:43,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538453488] [2021-08-27 04:29:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:43,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:43,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:44,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 04:29:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:44,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-08-27 04:29:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-08-27 04:29:44,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:44,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538453488] [2021-08-27 04:29:44,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538453488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:44,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311484180] [2021-08-27 04:29:44,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:29:44,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:44,042 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:44,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:29:44,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:29:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 04:29:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-08-27 04:29:44,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311484180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:44,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:44,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-27 04:29:44,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941997786] [2021-08-27 04:29:44,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 04:29:44,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:44,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 04:29:44,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:29:44,963 INFO L87 Difference]: Start difference. First operand 339 states and 419 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-27 04:29:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:46,233 INFO L93 Difference]: Finished difference Result 548 states and 709 transitions. [2021-08-27 04:29:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:29:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2021-08-27 04:29:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:46,235 INFO L225 Difference]: With dead ends: 548 [2021-08-27 04:29:46,235 INFO L226 Difference]: Without dead ends: 538 [2021-08-27 04:29:46,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1044.5ms TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:29:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-27 04:29:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 341. [2021-08-27 04:29:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 269 states have (on average 1.3308550185873607) internal successors, (358), 296 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-08-27 04:29:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 421 transitions. [2021-08-27 04:29:46,242 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 421 transitions. Word has length 61 [2021-08-27 04:29:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:46,242 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 421 transitions. [2021-08-27 04:29:46,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-27 04:29:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 421 transitions. [2021-08-27 04:29:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:29:46,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:46,243 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:46,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:46,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:29:46,456 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:29:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 887610513, now seen corresponding path program 3 times [2021-08-27 04:29:46,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:46,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081064895] [2021-08-27 04:29:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:46,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:29:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:46,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 04:29:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:47,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-08-27 04:29:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 04:29:47,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:47,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081064895] [2021-08-27 04:29:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081064895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:47,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367647174] [2021-08-27 04:29:47,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:29:47,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:47,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:47,178 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:47,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:29:47,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:29:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:29:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:47,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:29:47,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-08-27 04:29:50,059 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_16 Int)) (and (< v_sll_create_~new_head~0.base_16 |c_#StackHeapBarrier|) (= (store (store |c_old(#valid)| v_sll_create_~new_head~0.base_16 1) sll_create_~new_head~0.base 1) |c_#valid|))))) is different from true [2021-08-27 04:29:52,613 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-08-27 04:29:52,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 39 [2021-08-27 04:29:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 18 refuted. 3 times theorem prover too weak. 9 trivial. 17 not checked. [2021-08-27 04:29:52,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367647174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:52,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:52,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-08-27 04:29:52,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036609525] [2021-08-27 04:29:52,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:29:52,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:52,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:29:52,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=360, Unknown=2, NotChecked=40, Total=506 [2021-08-27 04:29:52,938 INFO L87 Difference]: Start difference. First operand 341 states and 421 transitions. Second operand has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:30:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:07,512 INFO L93 Difference]: Finished difference Result 476 states and 578 transitions. [2021-08-27 04:30:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:30:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-08-27 04:30:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:07,514 INFO L225 Difference]: With dead ends: 476 [2021-08-27 04:30:07,514 INFO L226 Difference]: Without dead ends: 476 [2021-08-27 04:30:07,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 7186.6ms TimeCoverageRelationStatistics Valid=198, Invalid=733, Unknown=3, NotChecked=58, Total=992 [2021-08-27 04:30:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-27 04:30:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2021-08-27 04:30:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.343558282208589) internal successors, (438), 354 states have internal predecessors, (438), 30 states have call successors, (30), 22 states have call predecessors, (30), 30 states have return successors, (44), 30 states have call predecessors, (44), 29 states have call successors, (44) [2021-08-27 04:30:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 512 transitions. [2021-08-27 04:30:07,520 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 512 transitions. Word has length 61 [2021-08-27 04:30:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:07,520 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 512 transitions. [2021-08-27 04:30:07,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:30:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 512 transitions. [2021-08-27 04:30:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:30:07,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:07,521 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:07,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 04:30:07,722 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:30:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:07,722 INFO L82 PathProgramCache]: Analyzing trace with hash 887610514, now seen corresponding path program 2 times [2021-08-27 04:30:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:30:07,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945498768] [2021-08-27 04:30:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:07,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:30:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:07,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:30:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:07,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:30:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:07,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 04:30:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-08-27 04:30:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 04:30:08,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:30:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945498768] [2021-08-27 04:30:08,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945498768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:30:08,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453728416] [2021-08-27 04:30:08,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:30:08,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:30:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:30:08,561 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:30:08,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:30:09,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:30:09,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:30:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 04:30:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:09,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:30:09,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:30:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-08-27 04:30:09,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-08-27 04:30:10,524 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-08-27 04:30:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 49 [2021-08-27 04:30:10,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:30:10,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-08-27 04:30:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 04:30:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453728416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:30:10,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:30:10,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-08-27 04:30:10,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113483051] [2021-08-27 04:30:10,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:30:10,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:30:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:30:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:30:10,871 INFO L87 Difference]: Start difference. First operand 407 states and 512 transitions. Second operand has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:30:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:14,421 INFO L93 Difference]: Finished difference Result 520 states and 629 transitions. [2021-08-27 04:30:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:30:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-08-27 04:30:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:14,424 INFO L225 Difference]: With dead ends: 520 [2021-08-27 04:30:14,424 INFO L226 Difference]: Without dead ends: 520 [2021-08-27 04:30:14,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1617.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:30:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-27 04:30:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 349. [2021-08-27 04:30:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 276 states have (on average 1.326086956521739) internal successors, (366), 304 states have internal predecessors, (366), 26 states have call successors, (26), 19 states have call predecessors, (26), 26 states have return successors, (38), 25 states have call predecessors, (38), 25 states have call successors, (38) [2021-08-27 04:30:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 430 transitions. [2021-08-27 04:30:14,430 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 430 transitions. Word has length 61 [2021-08-27 04:30:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:14,430 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 430 transitions. [2021-08-27 04:30:14,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 04:30:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 430 transitions. [2021-08-27 04:30:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-27 04:30:14,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:14,431 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:14,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:14,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:30:14,632 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_destroyErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:30:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 423798166, now seen corresponding path program 1 times [2021-08-27 04:30:14,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:30:14,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219636615] [2021-08-27 04:30:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:14,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:30:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:30:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:30:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:30:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:30:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 04:30:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 04:30:14,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:30:14,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219636615] [2021-08-27 04:30:14,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219636615] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:14,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:14,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:30:14,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628898531] [2021-08-27 04:30:14,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:30:14,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:30:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:30:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:30:14,775 INFO L87 Difference]: Start difference. First operand 349 states and 430 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 04:30:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:15,459 INFO L93 Difference]: Finished difference Result 391 states and 477 transitions. [2021-08-27 04:30:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:30:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-08-27 04:30:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:15,460 INFO L225 Difference]: With dead ends: 391 [2021-08-27 04:30:15,460 INFO L226 Difference]: Without dead ends: 391 [2021-08-27 04:30:15,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:30:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-27 04:30:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 363. [2021-08-27 04:30:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 288 states have (on average 1.3298611111111112) internal successors, (383), 315 states have internal predecessors, (383), 27 states have call successors, (27), 20 states have call predecessors, (27), 28 states have return successors, (41), 27 states have call predecessors, (41), 26 states have call successors, (41) [2021-08-27 04:30:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2021-08-27 04:30:15,466 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 64 [2021-08-27 04:30:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2021-08-27 04:30:15,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 04:30:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2021-08-27 04:30:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-27 04:30:15,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:15,467 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-27 04:30:15,467 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_destroyErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:30:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash 423798167, now seen corresponding path program 1 times [2021-08-27 04:30:15,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:30:15,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115645115] [2021-08-27 04:30:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:15,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:30:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:30:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:30:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:30:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 04:30:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 04:30:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-27 04:30:15,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:30:15,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115645115] [2021-08-27 04:30:15,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115645115] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:15,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:15,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:30:15,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46223635] [2021-08-27 04:30:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:30:15,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:30:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:30:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:30:15,671 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 04:30:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:16,284 INFO L93 Difference]: Finished difference Result 401 states and 487 transitions. [2021-08-27 04:30:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:30:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-08-27 04:30:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:16,286 INFO L225 Difference]: With dead ends: 401 [2021-08-27 04:30:16,286 INFO L226 Difference]: Without dead ends: 401 [2021-08-27 04:30:16,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:30:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-27 04:30:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2021-08-27 04:30:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 320 states have internal predecessors, (392), 27 states have call successors, (27), 20 states have call predecessors, (27), 27 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-08-27 04:30:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2021-08-27 04:30:16,291 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 64 [2021-08-27 04:30:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:16,291 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2021-08-27 04:30:16,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 04:30:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2021-08-27 04:30:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-27 04:30:16,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:16,291 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:16,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-27 04:30:16,292 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-08-27 04:30:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash 808154331, now seen corresponding path program 1 times [2021-08-27 04:30:16,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:30:16,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401639838] [2021-08-27 04:30:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:16,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:30:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:30:16,304 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 04:30:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:30:16,340 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 04:30:16,340 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 04:30:16,341 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr4ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:30:16,342 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr0REQUIRES_VIOLATION [2021-08-27 04:30:16,342 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr1REQUIRES_VIOLATION [2021-08-27 04:30:16,342 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:16,342 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:16,342 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr0REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr1REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr0REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr1REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:30:16,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr0REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr1REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr2REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr3REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr4REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr5REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr6REQUIRES_VIOLATION [2021-08-27 04:30:16,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr7REQUIRES_VIOLATION [2021-08-27 04:30:16,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr8REQUIRES_VIOLATION [2021-08-27 04:30:16,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr9REQUIRES_VIOLATION [2021-08-27 04:30:16,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-27 04:30:16,349 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:30:16,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:30:16 BoogieIcfgContainer [2021-08-27 04:30:16,386 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:30:16,387 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:30:16,400 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:30:16,401 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:30:16,401 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:27:03" (3/4) ... [2021-08-27 04:30:16,403 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 04:30:16,455 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:30:16,455 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:30:16,456 INFO L168 Benchmark]: Toolchain (without parser) took 193976.38 ms. Allocated memory was 65.0 MB in the beginning and 645.9 MB in the end (delta: 580.9 MB). Free memory was 43.7 MB in the beginning and 388.3 MB in the end (delta: -344.6 MB). Peak memory consumption was 234.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:16,456 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 65.0 MB. Free memory is still 46.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:30:16,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.51 ms. Allocated memory is still 65.0 MB. Free memory was 43.6 MB in the beginning and 41.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:16,456 INFO L168 Benchmark]: Boogie Preprocessor took 32.23 ms. Allocated memory is still 65.0 MB. Free memory was 41.0 MB in the beginning and 38.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:16,457 INFO L168 Benchmark]: RCFGBuilder took 591.63 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 37.9 MB in the beginning and 46.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:16,457 INFO L168 Benchmark]: TraceAbstraction took 192939.82 ms. Allocated memory was 88.1 MB in the beginning and 645.9 MB in the end (delta: 557.8 MB). Free memory was 46.4 MB in the beginning and 392.5 MB in the end (delta: -346.1 MB). Peak memory consumption was 213.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:16,457 INFO L168 Benchmark]: Witness Printer took 68.53 ms. Allocated memory is still 645.9 MB. Free memory was 392.5 MB in the beginning and 388.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:16,458 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 65.0 MB. Free memory is still 46.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.51 ms. Allocated memory is still 65.0 MB. Free memory was 43.6 MB in the beginning and 41.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.23 ms. Allocated memory is still 65.0 MB. Free memory was 41.0 MB in the beginning and 38.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 591.63 ms. Allocated memory was 65.0 MB in the beginning and 88.1 MB in the end (delta: 23.1 MB). Free memory was 37.9 MB in the beginning and 46.8 MB in the end (delta: -8.8 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 192939.82 ms. Allocated memory was 88.1 MB in the beginning and 645.9 MB in the end (delta: 557.8 MB). Free memory was 46.4 MB in the beginning and 392.5 MB in the end (delta: -346.1 MB). Peak memory consumption was 213.4 MB. Max. memory is 16.1 GB. * Witness Printer took 68.53 ms. Allocated memory is still 645.9 MB. Free memory was 392.5 MB in the beginning and 388.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 641]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L627] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L620] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L627] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); VAL [len=2, s={3:0}] [L628] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L575] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L576] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L582] head = new_head VAL [\old(len)=2, head={-1:0}, len=1, new_head={-1:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0, len--=1, new_head={-1:0}] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L582] head = new_head VAL [\old(len)=2, head={-2:0}, len=0, new_head={-2:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, new_head={-2:0}] [L576] COND FALSE !(len-- > 0) [L584] return head; VAL [\old(len)=2, \result={-2:0}, head={-2:0}, len=-1, new_head={-2:0}] [L628] RET, EXPR sll_create(len) VAL [len=2, s={3:0}, sll_create(len)={-2:0}] [L628] SLL s = sll_create(len); [L629] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L620] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L629] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={3:0}] [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; VAL [i=0, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={3:0}] [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}] [L636] CALL, EXPR sll_length(s) VAL [head={-2:0}] [L587] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L588] COND TRUE \read(head) [L589] len++ VAL [head={-2:0}, head={-2:0}, len=1] [L590] EXPR head->next VAL [head={-2:0}, head={-2:0}, head->next={-1:0}, len=1] [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ VAL [head={-2:0}, head={-1:0}, len=2] [L590] EXPR head->next VAL [head={-1:0}, head={-2:0}, head->next={0:0}, len=2] [L590] head = head->next [L588] COND FALSE !(\read(head)) VAL [head={0:0}, head={-2:0}, len=2] [L592] return len; VAL [\result=2, head={-2:0}, head={0:0}, len=2] [L636] RET, EXPR sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}, sll_length(s)=2] [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() VAL [i=0, k=1, len=2, s={3:0}] - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 116 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 192871.1ms, OverallIterations: 33, TraceHistogramMax: 5, EmptinessCheckTime: 52.7ms, AutomataDifference: 149068.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2809 SDtfs, 8137 SDslu, 15350 SDs, 0 SdLazy, 25160 SolverSat, 2022 SolverUnsat, 101 SolverUnknown, 0 SolverNotchecked, 125692.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2080 GetRequests, 1265 SyntacticMatches, 27 SemanticMatches, 788 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 34495.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=407occurred in iteration=29, InterpolantAutomatonStates: 472, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 278.7ms AutomataMinimizationTime, 32 MinimizatonAttempts, 2160 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 310.1ms SsaConstructionTime, 854.4ms SatisfiabilityAnalysisTime, 27636.4ms InterpolantComputationTime, 2769 NumberOfCodeBlocks, 2769 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 2652 ConstructedInterpolants, 327 QuantifiedInterpolants, 41221 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5550 ConjunctsInSsa, 445 ConjunctsInUnsatCore, 54 InterpolantComputations, 12 PerfectInterpolantSequences, 800/1391 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-27 04:30:16,684 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 04:30:16,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...