./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:21:02,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:21:02,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:21:02,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:21:02,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:21:02,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:21:02,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:21:02,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:21:02,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:21:02,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:21:02,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:21:02,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:21:02,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:21:02,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:21:02,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:21:02,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:21:02,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:21:02,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:21:02,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:21:02,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:21:02,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:21:02,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:21:02,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:21:02,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:21:02,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:21:02,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:21:02,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:21:02,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:21:02,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:21:02,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:21:02,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:21:02,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:21:02,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:21:02,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:21:02,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:21:02,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:21:02,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:21:02,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:21:02,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:21:02,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:21:02,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:21:02,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:21:02,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:21:02,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:21:02,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:21:02,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:21:02,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:21:02,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:21:02,970 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:21:02,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:21:02,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:21:02,971 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:21:02,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:21:02,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:21:02,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:21:02,972 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:21:02,972 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:21:02,972 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:21:02,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:21:02,973 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:21:02,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:21:02,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:21:02,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:21:02,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:21:02,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:21:02,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:21:02,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:21:02,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:21:02,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:21:02,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:21:02,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:21:02,975 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae [2021-11-02 22:21:03,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:21:03,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:21:03,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:21:03,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:21:03,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:21:03,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-11-02 22:21:03,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/data/970f466ef/34253be877af4bf9a2920d584e053620/FLAGbccf0f119 [2021-11-02 22:21:03,883 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:21:03,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-11-02 22:21:03,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/data/970f466ef/34253be877af4bf9a2920d584e053620/FLAGbccf0f119 [2021-11-02 22:21:04,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/data/970f466ef/34253be877af4bf9a2920d584e053620 [2021-11-02 22:21:04,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:21:04,205 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:21:04,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:21:04,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:21:04,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:21:04,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3ff059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04, skipping insertion in model container [2021-11-02 22:21:04,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:21:04,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:21:04,628 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-11-02 22:21:04,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:21:04,639 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:21:04,682 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-11-02 22:21:04,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:21:04,714 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:21:04,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04 WrapperNode [2021-11-02 22:21:04,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:21:04,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:21:04,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:21:04,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:21:04,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:21:04,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:21:04,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:21:04,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:21:04,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (1/1) ... [2021-11-02 22:21:04,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:21:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:04,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:21:04,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:21:04,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:21:04,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:21:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:21:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:21:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:21:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:21:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-02 22:21:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-11-02 22:21:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-11-02 22:21:04,879 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2021-11-02 22:21:04,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:21:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:21:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:21:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:21:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:21:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:21:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:21:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:21:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:21:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:21:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:21:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:21:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:21:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:21:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:21:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:21:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:21:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:21:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:21:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:21:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:21:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:21:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:21:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:21:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:21:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:21:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:21:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:21:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:21:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:21:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:21:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:21:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:21:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:21:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:21:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:21:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:21:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:21:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:21:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:21:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:21:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:21:04,888 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:21:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:21:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:21:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:21:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:21:04,889 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:21:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:21:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:21:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:21:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:21:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:21:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:21:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:21:04,891 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:21:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:21:04,893 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:21:04,893 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:21:04,894 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:21:04,894 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:21:04,894 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:21:04,894 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:21:04,894 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:21:04,895 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:21:04,895 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:21:04,895 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:21:04,895 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:21:04,895 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:21:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:21:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:21:04,896 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:21:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:21:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:21:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:21:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:21:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:21:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:21:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:21:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:21:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:21:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:21:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:21:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:21:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:21:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:21:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:21:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:21:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:21:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:21:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:21:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:21:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:21:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:21:04,900 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:21:04,901 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:21:04,901 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:21:04,901 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:21:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:21:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:21:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:21:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:21:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:21:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:21:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:21:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:21:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:21:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:21:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:21:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:21:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:21:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:21:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-02 22:21:04,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:21:04,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:21:04,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:21:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-11-02 22:21:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-11-02 22:21:04,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:21:04,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:21:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2021-11-02 22:21:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:21:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:21:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:21:05,236 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:21:05,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:21:05,549 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-02 22:21:05,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:21:05 BoogieIcfgContainer [2021-11-02 22:21:05,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:21:05,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:21:05,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:21:05,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:21:05,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:21:04" (1/3) ... [2021-11-02 22:21:05,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f54fb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:21:05, skipping insertion in model container [2021-11-02 22:21:05,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:21:04" (2/3) ... [2021-11-02 22:21:05,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f54fb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:21:05, skipping insertion in model container [2021-11-02 22:21:05,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:21:05" (3/3) ... [2021-11-02 22:21:05,561 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2021-11-02 22:21:05,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:21:05,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-11-02 22:21:05,625 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:21:05,634 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, mAutomataTypeConcurrency=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 [2021-11-02 22:21:05,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-11-02 22:21:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 83 states have internal predecessors, (93), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:21:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:21:05,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:05,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:05,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2122342107, now seen corresponding path program 1 times [2021-11-02 22:21:05,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:05,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582967826] [2021-11-02 22:21:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:05,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:05,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:06,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:06,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582967826] [2021-11-02 22:21:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582967826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:06,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:06,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083168800] [2021-11-02 22:21:06,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:06,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:06,058 INFO L87 Difference]: Start difference. First operand has 98 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 83 states have internal predecessors, (93), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:06,334 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-02 22:21:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-02 22:21:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:06,348 INFO L225 Difference]: With dead ends: 114 [2021-11-02 22:21:06,348 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 22:21:06,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 22:21:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2021-11-02 22:21:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 77 states have internal predecessors, (82), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-02 22:21:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-11-02 22:21:06,409 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 13 [2021-11-02 22:21:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:06,409 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-11-02 22:21:06,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-11-02 22:21:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:21:06,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:06,411 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:06,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:21:06,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2122342106, now seen corresponding path program 1 times [2021-11-02 22:21:06,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:06,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364592425] [2021-11-02 22:21:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:06,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:06,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:06,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:06,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364592425] [2021-11-02 22:21:06,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364592425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:06,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:06,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:06,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323468215] [2021-11-02 22:21:06,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:06,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:06,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:06,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:06,534 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:06,744 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-11-02 22:21:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-02 22:21:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:06,747 INFO L225 Difference]: With dead ends: 106 [2021-11-02 22:21:06,747 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 22:21:06,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 22:21:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-11-02 22:21:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 75 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-02 22:21:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-11-02 22:21:06,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 13 [2021-11-02 22:21:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:06,758 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-11-02 22:21:06,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:21:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-11-02 22:21:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:21:06,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:06,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:21:06,760 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash -549290758, now seen corresponding path program 1 times [2021-11-02 22:21:06,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:06,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196719747] [2021-11-02 22:21:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:06,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:06,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 22:21:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:06,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:06,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196719747] [2021-11-02 22:21:06,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196719747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:06,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:06,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:21:06,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445917576] [2021-11-02 22:21:06,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:21:06,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:21:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:06,899 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 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) [2021-11-02 22:21:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:07,268 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-11-02 22:21:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:07,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 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 19 [2021-11-02 22:21:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:07,270 INFO L225 Difference]: With dead ends: 105 [2021-11-02 22:21:07,270 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:21:07,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:21:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-02 22:21:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 74 states have internal predecessors, (79), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-02 22:21:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-11-02 22:21:07,280 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 19 [2021-11-02 22:21:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:07,280 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-11-02 22:21:07,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 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) [2021-11-02 22:21:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-11-02 22:21:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:21:07,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:07,282 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:07,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:21:07,282 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash -549290757, now seen corresponding path program 1 times [2021-11-02 22:21:07,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:07,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063220819] [2021-11-02 22:21:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:07,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 22:21:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:07,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:07,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063220819] [2021-11-02 22:21:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063220819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:07,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:07,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:21:07,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200939660] [2021-11-02 22:21:07,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:21:07,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:21:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:07,485 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 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) [2021-11-02 22:21:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:07,844 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-11-02 22:21:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:07,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 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 19 [2021-11-02 22:21:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:07,846 INFO L225 Difference]: With dead ends: 104 [2021-11-02 22:21:07,846 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:21:07,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:21:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-11-02 22:21:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 73 states have internal predecessors, (78), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-02 22:21:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-11-02 22:21:07,853 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 19 [2021-11-02 22:21:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:07,854 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-11-02 22:21:07,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 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) [2021-11-02 22:21:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-11-02 22:21:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:21:07,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:07,855 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:21:07,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:21:07,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1288688816, now seen corresponding path program 1 times [2021-11-02 22:21:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:07,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219406343] [2021-11-02 22:21:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:07,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:07,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:07,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219406343] [2021-11-02 22:21:07,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219406343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:07,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:07,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:21:07,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195767163] [2021-11-02 22:21:07,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:21:07,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:21:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:21:07,948 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:21:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:08,211 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-11-02 22:21:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-02 22:21:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:08,213 INFO L225 Difference]: With dead ends: 108 [2021-11-02 22:21:08,213 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:21:08,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:21:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-02 22:21:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.58) internal successors, (79), 74 states have internal predecessors, (79), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-02 22:21:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-11-02 22:21:08,220 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 25 [2021-11-02 22:21:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:08,220 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-11-02 22:21:08,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:21:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-11-02 22:21:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:21:08,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:08,222 INFO L513 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] [2021-11-02 22:21:08,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:21:08,223 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash -894716830, now seen corresponding path program 1 times [2021-11-02 22:21:08,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:08,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732411468] [2021-11-02 22:21:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:08,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:08,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:08,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:08,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:08,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:21:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:21:08,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:08,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732411468] [2021-11-02 22:21:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732411468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:08,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017312604] [2021-11-02 22:21:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:08,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:08,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:08,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:08,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:21:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:21:08,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:08,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017312604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:08,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:08,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-02 22:21:08,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627191030] [2021-11-02 22:21:08,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:21:08,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:21:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:08,686 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-02 22:21:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:09,023 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2021-11-02 22:21:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:21:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2021-11-02 22:21:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:09,025 INFO L225 Difference]: With dead ends: 114 [2021-11-02 22:21:09,025 INFO L226 Difference]: Without dead ends: 111 [2021-11-02 22:21:09,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:21:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-02 22:21:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2021-11-02 22:21:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 79 states have internal predecessors, (84), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:21:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-11-02 22:21:09,031 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 38 [2021-11-02 22:21:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-11-02 22:21:09,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-02 22:21:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-11-02 22:21:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:21:09,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:09,034 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:09,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:09,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:21:09,250 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash 663250416, now seen corresponding path program 2 times [2021-11-02 22:21:09,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:09,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685808483] [2021-11-02 22:21:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:09,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:09,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:09,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:09,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:21:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:21:10,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:10,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685808483] [2021-11-02 22:21:10,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685808483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:10,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798303899] [2021-11-02 22:21:10,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:21:10,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:10,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:10,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:21:10,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:21:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:21:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:10,265 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 [2021-11-02 22:21:10,299 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 [2021-11-02 22:21:10,761 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 22:21:10,761 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 18 treesize of output 22 [2021-11-02 22:21:10,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:21:10,936 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 19 treesize of output 15 [2021-11-02 22:21:11,061 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:21:11,062 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 27 treesize of output 32 [2021-11-02 22:21:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:21:11,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798303899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:11,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:11,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-11-02 22:21:11,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970864620] [2021-11-02 22:21:11,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:21:11,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:21:11,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:21:11,129 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:21:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:12,605 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2021-11-02 22:21:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:21:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 51 [2021-11-02 22:21:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:12,608 INFO L225 Difference]: With dead ends: 173 [2021-11-02 22:21:12,608 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 22:21:12,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:21:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 22:21:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 112. [2021-11-02 22:21:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 93 states have internal predecessors, (104), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-11-02 22:21:12,616 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 51 [2021-11-02 22:21:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:12,617 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-11-02 22:21:12,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:21:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-11-02 22:21:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:21:12,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:12,619 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:12,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:12,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:12,846 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_prependErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:12,846 INFO L85 PathProgramCache]: Analyzing trace with hash 663250417, now seen corresponding path program 1 times [2021-11-02 22:21:12,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:12,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674488377] [2021-11-02 22:21:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:12,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:21:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:21:13,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:13,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674488377] [2021-11-02 22:21:13,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674488377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:13,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284962687] [2021-11-02 22:21:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:13,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:13,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:13,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:21:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:21:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:13,617 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 [2021-11-02 22:21:13,659 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 [2021-11-02 22:21:14,242 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 22:21:14,243 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 21 treesize of output 25 [2021-11-02 22:21:14,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:21:14,448 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 19 treesize of output 15 [2021-11-02 22:21:14,547 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:21:14,548 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 27 treesize of output 32 [2021-11-02 22:21:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:21:14,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284962687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:14,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:14,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-02 22:21:14,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333204637] [2021-11-02 22:21:14,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:21:14,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:21:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:21:14,628 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:21:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:15,795 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2021-11-02 22:21:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:21:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2021-11-02 22:21:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:15,798 INFO L225 Difference]: With dead ends: 181 [2021-11-02 22:21:15,798 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 22:21:15,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:21:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 22:21:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 124. [2021-11-02 22:21:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 105 states have internal predecessors, (125), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2021-11-02 22:21:15,814 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 51 [2021-11-02 22:21:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:15,816 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2021-11-02 22:21:15,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:21:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2021-11-02 22:21:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:21:15,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:15,823 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:15,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:16,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:21:16,050 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_prependErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash -914073471, now seen corresponding path program 1 times [2021-11-02 22:21:16,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:16,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701006434] [2021-11-02 22:21:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:16,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:21:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:21:16,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:16,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701006434] [2021-11-02 22:21:16,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701006434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:16,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:16,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:21:16,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052000856] [2021-11-02 22:21:16,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:21:16,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:21:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:16,210 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:21:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:16,502 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-11-02 22:21:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:16,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-02 22:21:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:16,505 INFO L225 Difference]: With dead ends: 136 [2021-11-02 22:21:16,506 INFO L226 Difference]: Without dead ends: 136 [2021-11-02 22:21:16,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-02 22:21:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2021-11-02 22:21:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.4819277108433735) internal successors, (123), 104 states have internal predecessors, (123), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-11-02 22:21:16,513 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 52 [2021-11-02 22:21:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:16,513 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-11-02 22:21:16,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:21:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-11-02 22:21:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:21:16,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:16,515 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:16,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:21:16,516 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_prependErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash -914073472, now seen corresponding path program 1 times [2021-11-02 22:21:16,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:16,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10074043] [2021-11-02 22:21:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:16,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:21:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:21:16,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:16,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10074043] [2021-11-02 22:21:16,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10074043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:16,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:16,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:21:16,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533668421] [2021-11-02 22:21:16,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:21:16,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:21:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:21:16,636 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:21:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:16,900 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2021-11-02 22:21:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:21:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-02 22:21:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:16,902 INFO L225 Difference]: With dead ends: 135 [2021-11-02 22:21:16,902 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 22:21:16,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:21:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 22:21:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2021-11-02 22:21:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 103 states have internal predecessors, (121), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2021-11-02 22:21:16,909 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 52 [2021-11-02 22:21:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:16,910 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2021-11-02 22:21:16,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:21:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2021-11-02 22:21:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:21:16,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:16,911 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:21:16,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 573019591, now seen corresponding path program 1 times [2021-11-02 22:21:16,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:16,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277139387] [2021-11-02 22:21:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:16,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:21:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:21:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:21:17,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:17,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277139387] [2021-11-02 22:21:17,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277139387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:17,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:17,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:21:17,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587481155] [2021-11-02 22:21:17,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:21:17,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:21:17,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:21:17,121 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 13 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 22:21:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:17,593 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-11-02 22:21:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:21:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-11-02 22:21:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:17,595 INFO L225 Difference]: With dead ends: 135 [2021-11-02 22:21:17,595 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 22:21:17,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:21:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 22:21:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2021-11-02 22:21:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 100 states have internal predecessors, (115), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2021-11-02 22:21:17,601 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 59 [2021-11-02 22:21:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:17,602 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2021-11-02 22:21:17,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 22:21:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2021-11-02 22:21:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:21:17,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:17,604 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:17,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:21:17,604 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 573019592, now seen corresponding path program 1 times [2021-11-02 22:21:17,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:17,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125108542] [2021-11-02 22:21:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:17,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:21:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:21:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:21:17,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:17,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125108542] [2021-11-02 22:21:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125108542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:17,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:17,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:21:17,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758819937] [2021-11-02 22:21:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:21:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:21:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:21:17,868 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 22:21:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:18,324 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-11-02 22:21:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:21:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-11-02 22:21:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:18,326 INFO L225 Difference]: With dead ends: 132 [2021-11-02 22:21:18,326 INFO L226 Difference]: Without dead ends: 132 [2021-11-02 22:21:18,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:21:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-02 22:21:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2021-11-02 22:21:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 98 states have internal predecessors, (111), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-11-02 22:21:18,332 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 59 [2021-11-02 22:21:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:18,333 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-11-02 22:21:18,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 22:21:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-11-02 22:21:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:21:18,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:18,335 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:18,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:21:18,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash 916015055, now seen corresponding path program 1 times [2021-11-02 22:21:18,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:18,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824908089] [2021-11-02 22:21:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:18,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:21:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:21:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:21:18,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:18,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824908089] [2021-11-02 22:21:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824908089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:18,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:18,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-02 22:21:18,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153530996] [2021-11-02 22:21:18,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:21:18,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:21:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:21:18,708 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 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) [2021-11-02 22:21:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:19,440 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-11-02 22:21:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:21:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 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 61 [2021-11-02 22:21:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:19,442 INFO L225 Difference]: With dead ends: 130 [2021-11-02 22:21:19,442 INFO L226 Difference]: Without dead ends: 130 [2021-11-02 22:21:19,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:21:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-02 22:21:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 117. [2021-11-02 22:21:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 98 states have internal predecessors, (109), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:21:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-11-02 22:21:19,448 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 61 [2021-11-02 22:21:19,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:19,448 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-11-02 22:21:19,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 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) [2021-11-02 22:21:19,449 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-11-02 22:21:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:21:19,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:19,451 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:19,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:21:19,452 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash 832121634, now seen corresponding path program 3 times [2021-11-02 22:21:19,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:19,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292482365] [2021-11-02 22:21:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:19,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:21:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-02 22:21:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-02 22:21:19,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:19,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292482365] [2021-11-02 22:21:19,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292482365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:19,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735757145] [2021-11-02 22:21:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:21:19,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:19,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:19,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:19,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:21:19,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:21:19,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:21:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:21:20,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735757145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:20,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:21:20,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-11-02 22:21:20,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629526677] [2021-11-02 22:21:20,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:21:20,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:21:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:21:20,131 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:21:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:20,411 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-02 22:21:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:21:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2021-11-02 22:21:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:20,413 INFO L225 Difference]: With dead ends: 100 [2021-11-02 22:21:20,413 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 22:21:20,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:21:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 22:21:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2021-11-02 22:21:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 64 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:21:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-02 22:21:20,417 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 64 [2021-11-02 22:21:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-02 22:21:20,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:21:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-02 22:21:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:21:20,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:20,419 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:21:20,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:20,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:20,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr6REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:21:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1216883684, now seen corresponding path program 1 times [2021-11-02 22:21:20,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:20,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588548551] [2021-11-02 22:21:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:20,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:21:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:20,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:21:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:20,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:21:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:20,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:21:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:21:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:21:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:21:21,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:21,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588548551] [2021-11-02 22:21:21,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588548551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:21,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767989087] [2021-11-02 22:21:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:21,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:21,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:21,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:21,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:21:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:22,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-02 22:21:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:22,235 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 [2021-11-02 22:21:22,410 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 13 treesize of output 9 [2021-11-02 22:21:26,710 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 101 treesize of output 97 [2021-11-02 22:21:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:21:40,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:21:40,977 INFO L354 Elim1Store]: treesize reduction 206, result has 28.2 percent of original size [2021-11-02 22:21:40,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 132 [2021-11-02 22:21:41,004 INFO L354 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2021-11-02 22:21:41,005 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 2 case distinctions, treesize of input 181 treesize of output 199 [2021-11-02 22:21:41,083 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-11-02 22:21:41,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 108 [2021-11-02 22:21:41,253 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 93 treesize of output 77 [2021-11-02 22:21:41,744 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-02 22:21:41,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 41 [2021-11-02 22:21:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:21:41,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767989087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:41,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:41,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 44 [2021-11-02 22:21:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984020604] [2021-11-02 22:21:41,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:21:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:21:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1857, Unknown=9, NotChecked=0, Total=1980 [2021-11-02 22:21:41,968 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 27 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:22:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:13,432 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-02 22:22:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:22:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 64 [2021-11-02 22:22:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:13,434 INFO L225 Difference]: With dead ends: 101 [2021-11-02 22:22:13,434 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 22:22:13,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=190, Invalid=2662, Unknown=10, NotChecked=0, Total=2862 [2021-11-02 22:22:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 22:22:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-11-02 22:22:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 66 states have internal predecessors, (71), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:22:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-02 22:22:13,442 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 64 [2021-11-02 22:22:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:13,442 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-02 22:22:13,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:22:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-02 22:22:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:22:13,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:13,444 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:22:13,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:13,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:22:13,645 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr7REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:22:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1216883683, now seen corresponding path program 1 times [2021-11-02 22:22:13,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:13,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246080047] [2021-11-02 22:22:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:13,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:13,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:22:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:13,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:22:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:22:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:14,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:22:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:14,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:22:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:15,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:22:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:22:15,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:15,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246080047] [2021-11-02 22:22:15,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246080047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:15,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301597624] [2021-11-02 22:22:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:15,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:22:15,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:22:15,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:22:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-02 22:22:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:16,140 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 [2021-11-02 22:22:16,918 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 29 treesize of output 21 [2021-11-02 22:22:16,924 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 11 treesize of output 7 [2021-11-02 22:22:42,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:22:42,450 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-02 22:22:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 197 [2021-11-02 22:22:42,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:42,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:22:42,557 INFO L354 Elim1Store]: treesize reduction 238, result has 25.4 percent of original size [2021-11-02 22:22:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 323 treesize of output 293 [2021-11-02 22:22:42,584 INFO L354 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2021-11-02 22:22:42,585 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 336 treesize of output 336 [2021-11-02 22:22:42,616 INFO L354 Elim1Store]: treesize reduction 65, result has 22.6 percent of original size [2021-11-02 22:22:42,617 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 330 treesize of output 332 [2021-11-02 22:22:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:22:42,869 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-02 22:22:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 250 [2021-11-02 22:22:42,972 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-11-02 22:22:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 276 treesize of output 173 [2021-11-02 22:22:44,467 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-11-02 22:22:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 110 [2021-11-02 22:22:44,481 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-02 22:22:44,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 76 [2021-11-02 22:22:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:22:44,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301597624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:44,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:22:44,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 52 [2021-11-02 22:22:44,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880266082] [2021-11-02 22:22:44,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 22:22:44,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:44,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 22:22:44,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2619, Unknown=10, NotChecked=0, Total=2756 [2021-11-02 22:22:44,884 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 53 states, 46 states have (on average 1.934782608695652) internal successors, (89), 42 states have internal predecessors, (89), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-02 22:23:42,567 WARN L207 SmtUtils]: Spent 7.46 s on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2021-11-02 22:23:53,890 WARN L207 SmtUtils]: Spent 7.04 s on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-11-02 22:23:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:59,831 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-11-02 22:23:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:23:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 1.934782608695652) internal successors, (89), 42 states have internal predecessors, (89), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 64 [2021-11-02 22:23:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:59,833 INFO L225 Difference]: With dead ends: 104 [2021-11-02 22:23:59,834 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:23:59,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=323, Invalid=5818, Unknown=21, NotChecked=0, Total=6162 [2021-11-02 22:23:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:23:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-11-02 22:23:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 68 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:23:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-02 22:23:59,842 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 64 [2021-11-02 22:23:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:59,843 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-02 22:23:59,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 1.934782608695652) internal successors, (89), 42 states have internal predecessors, (89), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-02 22:23:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-02 22:23:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:23:59,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:59,845 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:23:59,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:00,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:24:00,058 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:24:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash 931310166, now seen corresponding path program 1 times [2021-11-02 22:24:00,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:00,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13403850] [2021-11-02 22:24:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:00,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:00,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:00,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:24:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:00,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:24:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:00,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:24:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:00,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:24:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:00,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:24:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:24:01,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:01,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13403850] [2021-11-02 22:24:01,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13403850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:01,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506621360] [2021-11-02 22:24:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:01,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:01,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:01,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:24:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 22:24:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:02,009 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 21 treesize of output 13 [2021-11-02 22:24:07,282 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 90 treesize of output 86 [2021-11-02 22:24:09,301 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_4 Int) (sll_prepend_~new_head~1.base Int)) (and (<= (+ sll_prepend_~new_head~1.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base (let ((.cse1 (store (store (select |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base) 4 0) 0 v_DerPreprocessor_4))) (store .cse1 (+ (select (select |c_#memory_$Pointer$.offset| |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset|) 4) (select (select (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base .cse1) |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset|)))))) (store .cse0 |c_sll_prepend_#in~head.base| (store (select .cse0 |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset| sll_prepend_~new_head~1.base)))))) is different from true [2021-11-02 22:24:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:24:09,466 INFO L354 Elim1Store]: treesize reduction 206, result has 28.2 percent of original size [2021-11-02 22:24:09,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 125 [2021-11-02 22:24:09,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:24:09,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2021-11-02 22:24:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 22 [2021-11-02 22:24:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:09,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 25 [2021-11-02 22:24:09,723 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 80 treesize of output 64 [2021-11-02 22:24:10,319 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-02 22:24:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 36 [2021-11-02 22:24:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:24:10,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506621360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:10,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:24:10,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2021-11-02 22:24:10,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887367659] [2021-11-02 22:24:10,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 22:24:10,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 22:24:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1621, Unknown=3, NotChecked=80, Total=1806 [2021-11-02 22:24:10,350 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 43 states, 37 states have (on average 2.0) internal successors, (74), 33 states have internal predecessors, (74), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:24:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:30,540 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-02 22:24:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:24:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.0) internal successors, (74), 33 states have internal predecessors, (74), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2021-11-02 22:24:30,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:30,542 INFO L225 Difference]: With dead ends: 98 [2021-11-02 22:24:30,543 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 22:24:30,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=237, Invalid=3668, Unknown=5, NotChecked=122, Total=4032 [2021-11-02 22:24:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 22:24:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2021-11-02 22:24:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 68 states have internal predecessors, (71), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:24:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-02 22:24:30,550 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 65 [2021-11-02 22:24:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-02 22:24:30,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.0) internal successors, (74), 33 states have internal predecessors, (74), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:24:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-02 22:24:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:24:30,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:30,553 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2021-11-02 22:24:30,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:30,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:24:30,769 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:24:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash -786563412, now seen corresponding path program 1 times [2021-11-02 22:24:30,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:30,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792845345] [2021-11-02 22:24:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:30,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:31,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:24:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:31,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:24:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:31,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:24:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:24:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:24:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:24:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:24:34,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:34,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792845345] [2021-11-02 22:24:34,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792845345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:24:34,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100605819] [2021-11-02 22:24:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:34,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:34,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:34,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:34,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:24:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-02 22:24:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:24:34,688 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 [2021-11-02 22:24:34,785 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 [2021-11-02 22:24:34,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:24:34,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-02 22:24:35,290 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 40 treesize of output 28 [2021-11-02 22:24:35,295 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 28 treesize of output 24 [2021-11-02 22:24:35,302 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 21 treesize of output 19 [2021-11-02 22:24:35,308 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 11 treesize of output 7 [2021-11-02 22:24:55,682 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 58 [2021-11-02 22:25:18,903 INFO L354 Elim1Store]: treesize reduction 211, result has 17.6 percent of original size [2021-11-02 22:25:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 240 treesize of output 229 [2021-11-02 22:25:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:25:19,020 INFO L354 Elim1Store]: treesize reduction 166, result has 25.6 percent of original size [2021-11-02 22:25:19,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 226 [2021-11-02 22:25:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:25:19,118 INFO L354 Elim1Store]: treesize reduction 206, result has 28.2 percent of original size [2021-11-02 22:25:19,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 298 treesize of output 276 [2021-11-02 22:25:19,149 INFO L354 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2021-11-02 22:25:19,149 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 393 treesize of output 393 [2021-11-02 22:25:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,252 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-11-02 22:25:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 47 [2021-11-02 22:25:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 22 [2021-11-02 22:25:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,473 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-11-02 22:25:19,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 37 [2021-11-02 22:25:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:25:19,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 22 [2021-11-02 22:25:20,696 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-11-02 22:25:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 84 [2021-11-02 22:25:20,709 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-11-02 22:25:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 51 [2021-11-02 22:25:21,058 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 15 treesize of output 7 [2021-11-02 22:25:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:25:21,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100605819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:21,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:21,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 50 [2021-11-02 22:25:21,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930896840] [2021-11-02 22:25:21,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 22:25:21,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 22:25:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2318, Unknown=14, NotChecked=0, Total=2450 [2021-11-02 22:25:21,195 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 50 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 40 states have internal predecessors, (85), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:25:54,468 WARN L207 SmtUtils]: Spent 9.12 s on a formula simplification. DAG size of input: 119 DAG size of output: 82 [2021-11-02 22:26:45,677 WARN L207 SmtUtils]: Spent 11.97 s on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2021-11-02 22:27:01,968 WARN L207 SmtUtils]: Spent 12.06 s on a formula simplification. DAG size of input: 101 DAG size of output: 59 [2021-11-02 22:27:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:07,511 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-02 22:27:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:27:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 40 states have internal predecessors, (85), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 68 [2021-11-02 22:27:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:07,513 INFO L225 Difference]: With dead ends: 96 [2021-11-02 22:27:07,513 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 22:27:07,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 115.8s TimeCoverageRelationStatistics Valid=278, Invalid=4952, Unknown=26, NotChecked=0, Total=5256 [2021-11-02 22:27:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 22:27:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-11-02 22:27:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.2) internal successors, (72), 69 states have internal predecessors, (72), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:27:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-02 22:27:07,521 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 68 [2021-11-02 22:27:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:07,521 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-02 22:27:07,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 40 states have internal predecessors, (85), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:27:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-02 22:27:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:27:07,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:07,523 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:27:07,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:07,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:27:07,724 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr6REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:27:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1386339228, now seen corresponding path program 1 times [2021-11-02 22:27:07,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:07,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958708461] [2021-11-02 22:27:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:07,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:08,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:27:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:08,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:27:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:08,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:27:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:27:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:27:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:27:11,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:11,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958708461] [2021-11-02 22:27:11,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958708461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:11,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305848292] [2021-11-02 22:27:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:11,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:11,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:11,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:27:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-02 22:27:12,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:12,041 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 [2021-11-02 22:27:12,119 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 [2021-11-02 22:27:12,705 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 13 treesize of output 9 [2021-11-02 22:27:12,712 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 13 treesize of output 9 [2021-11-02 22:27:12,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:27:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:27:13,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:27:13,268 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 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-02 22:27:13,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:27:13,284 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 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-02 22:27:13,674 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-02 22:27:13,674 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 32 treesize of output 38 [2021-11-02 22:27:13,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:27:13,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 37 [2021-11-02 22:27:13,966 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:27:13,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-11-02 22:27:13,973 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 11 treesize of output 7 [2021-11-02 22:27:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:27:46,580 INFO L354 Elim1Store]: treesize reduction 166, result has 25.6 percent of original size [2021-11-02 22:27:46,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 230 [2021-11-02 22:27:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:46,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:27:46,754 INFO L354 Elim1Store]: treesize reduction 334, result has 22.1 percent of original size [2021-11-02 22:27:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 288 treesize of output 267 [2021-11-02 22:27:46,870 INFO L354 Elim1Store]: treesize reduction 270, result has 26.2 percent of original size [2021-11-02 22:27:46,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 432 treesize of output 482 [2021-11-02 22:27:46,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:46,944 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-11-02 22:27:46,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 55 [2021-11-02 22:27:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:27:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 32 [2021-11-02 22:27:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 43 [2021-11-02 22:27:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:27:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 46 [2021-11-02 22:27:49,726 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-11-02 22:27:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 289 treesize of output 131 [2021-11-02 22:27:49,741 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-02 22:27:49,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 76 [2021-11-02 22:27:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:27:51,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305848292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:51,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:51,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2021-11-02 22:27:51,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337543761] [2021-11-02 22:27:51,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-02 22:27:51,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-02 22:27:51,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5017, Unknown=13, NotChecked=0, Total=5256 [2021-11-02 22:27:51,517 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 73 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 60 states have internal predecessors, (110), 10 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:28:44,338 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2021-11-02 22:28:56,429 WARN L207 SmtUtils]: Spent 7.80 s on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2021-11-02 22:29:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:06,091 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2021-11-02 22:29:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:29:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 60 states have internal predecessors, (110), 10 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 69 [2021-11-02 22:29:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:06,094 INFO L225 Difference]: With dead ends: 114 [2021-11-02 22:29:06,094 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 22:29:06,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 76.2s TimeCoverageRelationStatistics Valid=487, Invalid=9194, Unknown=21, NotChecked=0, Total=9702 [2021-11-02 22:29:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 22:29:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2021-11-02 22:29:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 71 states have internal predecessors, (76), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:29:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-11-02 22:29:06,104 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 69 [2021-11-02 22:29:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:06,104 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-11-02 22:29:06,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 60 states have internal predecessors, (110), 10 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:29:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-11-02 22:29:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:29:06,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:06,107 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:29:06,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:06,314 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr7REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:29:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1386339229, now seen corresponding path program 1 times [2021-11-02 22:29:06,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:06,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761389075] [2021-11-02 22:29:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:06,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:29:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:29:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:07,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:29:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:07,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:29:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:07,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:29:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:11,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:29:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:29:11,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:11,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761389075] [2021-11-02 22:29:11,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761389075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:11,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673810465] [2021-11-02 22:29:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:11,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:11,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:11,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:11,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:29:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-02 22:29:12,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:12,595 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 [2021-11-02 22:29:12,689 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 [2021-11-02 22:29:12,782 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 [2021-11-02 22:29:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-02 22:29:14,470 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 36 treesize of output 32 [2021-11-02 22:29:14,482 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 22 treesize of output 18 [2021-11-02 22:29:15,157 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-02 22:29:15,157 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 32 treesize of output 38 [2021-11-02 22:29:15,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:29:15,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 63 [2021-11-02 22:29:15,584 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:29:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2021-11-02 22:29:15,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:29:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-02 22:29:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:47,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:47,626 INFO L354 Elim1Store]: treesize reduction 266, result has 22.0 percent of original size [2021-11-02 22:29:47,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 298 treesize of output 253 [2021-11-02 22:29:47,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:47,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:47,764 INFO L354 Elim1Store]: treesize reduction 522, result has 18.1 percent of original size [2021-11-02 22:29:47,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 475 treesize of output 451 [2021-11-02 22:29:47,803 INFO L354 Elim1Store]: treesize reduction 108, result has 31.2 percent of original size [2021-11-02 22:29:47,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 567 [2021-11-02 22:29:47,841 INFO L354 Elim1Store]: treesize reduction 180, result has 19.3 percent of original size [2021-11-02 22:29:47,841 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 555 treesize of output 560 [2021-11-02 22:29:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:47,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:47,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 40 [2021-11-02 22:29:47,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:47,964 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-11-02 22:29:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 66 [2021-11-02 22:29:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:48,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 51 [2021-11-02 22:29:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:48,145 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-11-02 22:29:48,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 205 treesize of output 97 [2021-11-02 22:29:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:48,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:29:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 63 [2021-11-02 22:29:53,450 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-11-02 22:29:53,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 328 treesize of output 142 [2021-11-02 22:29:53,483 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-11-02 22:29:53,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 82 [2021-11-02 22:29:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673810465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:56,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:56,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39] total 73 [2021-11-02 22:29:56,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047603683] [2021-11-02 22:29:56,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-02 22:29:56,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-02 22:29:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5194, Unknown=12, NotChecked=0, Total=5402 [2021-11-02 22:29:56,161 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 74 states, 68 states have (on average 1.6176470588235294) internal successors, (110), 60 states have internal predecessors, (110), 9 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-02 22:30:57,488 WARN L207 SmtUtils]: Spent 8.26 s on a formula simplification. DAG size of input: 111 DAG size of output: 62 [2021-11-02 22:31:10,173 WARN L207 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2021-11-02 22:31:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:22,441 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-11-02 22:31:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:31:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 68 states have (on average 1.6176470588235294) internal successors, (110), 60 states have internal predecessors, (110), 9 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 69 [2021-11-02 22:31:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:22,443 INFO L225 Difference]: With dead ends: 113 [2021-11-02 22:31:22,443 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 22:31:22,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 90.1s TimeCoverageRelationStatistics Valid=511, Invalid=11022, Unknown=23, NotChecked=0, Total=11556 [2021-11-02 22:31:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 22:31:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-11-02 22:31:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.203125) internal successors, (77), 73 states have internal predecessors, (77), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:31:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-11-02 22:31:22,453 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 69 [2021-11-02 22:31:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:22,454 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-11-02 22:31:22,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 68 states have (on average 1.6176470588235294) internal successors, (110), 60 states have internal predecessors, (110), 9 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-02 22:31:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-11-02 22:31:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:31:22,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:22,456 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-02 22:31:22,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:22,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:22,670 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:31:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash 26841814, now seen corresponding path program 1 times [2021-11-02 22:31:22,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:22,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663638821] [2021-11-02 22:31:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:22,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:23,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:31:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:23,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:31:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:23,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:31:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:31:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:25,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:31:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:31:25,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:25,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663638821] [2021-11-02 22:31:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663638821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:25,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240208623] [2021-11-02 22:31:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:25,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:25,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:25,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:31:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-02 22:31:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:27,241 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 [2021-11-02 22:31:27,398 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 18 treesize of output 14 [2021-11-02 22:31:27,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:31:27,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-11-02 22:31:27,859 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 21 treesize of output 17 [2021-11-02 22:31:27,865 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 [2021-11-02 22:31:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:31:59,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:31:59,950 INFO L354 Elim1Store]: treesize reduction 266, result has 22.0 percent of original size [2021-11-02 22:31:59,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 225 treesize of output 212 [2021-11-02 22:31:59,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:31:59,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:00,074 INFO L354 Elim1Store]: treesize reduction 238, result has 25.4 percent of original size [2021-11-02 22:32:00,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 362 treesize of output 332 [2021-11-02 22:32:00,106 INFO L354 Elim1Store]: treesize reduction 4, result has 84.6 percent of original size [2021-11-02 22:32:00,106 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 387 treesize of output 387 [2021-11-02 22:32:00,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2021-11-02 22:32:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:32:00,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 39 [2021-11-02 22:32:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-11-02 22:32:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 43 [2021-11-02 22:32:00,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:32:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 32 [2021-11-02 22:32:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:00,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 46 [2021-11-02 22:32:01,724 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-02 22:32:01,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 103 [2021-11-02 22:32:02,444 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-02 22:32:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 43 [2021-11-02 22:32:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:32:02,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240208623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:02,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:32:02,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36] total 57 [2021-11-02 22:32:02,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066970810] [2021-11-02 22:32:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 22:32:02,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 22:32:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3039, Unknown=13, NotChecked=0, Total=3192 [2021-11-02 22:32:02,551 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 57 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:33:00,272 WARN L207 SmtUtils]: Spent 7.85 s on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2021-11-02 22:33:12,480 WARN L207 SmtUtils]: Spent 7.99 s on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2021-11-02 22:33:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:20,499 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-11-02 22:33:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:33:20,500 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 70 [2021-11-02 22:33:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:20,501 INFO L225 Difference]: With dead ends: 103 [2021-11-02 22:33:20,501 INFO L226 Difference]: Without dead ends: 103 [2021-11-02 22:33:20,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=372, Invalid=6744, Unknown=24, NotChecked=0, Total=7140 [2021-11-02 22:33:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-02 22:33:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2021-11-02 22:33:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.1875) internal successors, (76), 73 states have internal predecessors, (76), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:33:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-11-02 22:33:20,507 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 70 [2021-11-02 22:33:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:20,508 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-11-02 22:33:20,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 51 states have (on average 1.7058823529411764) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:33:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-11-02 22:33:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:33:20,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:20,510 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:20,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:20,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:20,723 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:33:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash 821577260, now seen corresponding path program 1 times [2021-11-02 22:33:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:33:20,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687310308] [2021-11-02 22:33:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:20,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:33:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:21,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:33:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:33:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:22,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:33:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:33:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:23,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:33:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:33:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:33:28,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:33:28,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687310308] [2021-11-02 22:33:28,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687310308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:33:28,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636737940] [2021-11-02 22:33:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:28,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:33:28,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:28,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:33:28,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811d4aac-35db-4628-ac20-3059a4f6b297/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:33:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:29,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-02 22:33:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:29,317 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 [2021-11-02 22:33:29,472 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 [2021-11-02 22:33:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:33:29,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-02 22:33:30,206 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 [2021-11-02 22:33:30,330 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 [2021-11-02 22:33:37,076 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:33:37,077 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:33:37,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-11-02 22:33:37,490 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 46 treesize of output 42 [2021-11-02 22:33:37,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2021-11-02 22:33:37,513 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 [2021-11-02 22:33:38,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:33:38,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 46 [2021-11-02 22:33:38,845 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:33:38,845 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 40 treesize of output 36 [2021-11-02 22:33:38,850 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 30 treesize of output 28 [2021-11-02 22:33:38,874 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 25 treesize of output 21 [2021-11-02 22:33:38,881 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 11 treesize of output 7 [2021-11-02 22:34:08,245 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 61 [2021-11-02 22:34:28,227 INFO L354 Elim1Store]: treesize reduction 259, result has 15.9 percent of original size [2021-11-02 22:34:28,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 275 treesize of output 264 [2021-11-02 22:34:28,345 INFO L354 Elim1Store]: treesize reduction 158, result has 22.2 percent of original size [2021-11-02 22:34:28,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 252 [2021-11-02 22:34:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:34:28,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:34:28,512 INFO L354 Elim1Store]: treesize reduction 334, result has 22.1 percent of original size [2021-11-02 22:34:28,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 296 treesize of output 251 [2021-11-02 22:34:28,547 INFO L354 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2021-11-02 22:34:28,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 460 treesize of output 466 [2021-11-02 22:34:28,581 INFO L354 Elim1Store]: treesize reduction 65, result has 22.6 percent of original size [2021-11-02 22:34:28,582 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 457 treesize of output 459 [2021-11-02 22:34:29,020 INFO L354 Elim1Store]: treesize reduction 69, result has 14.8 percent of original size [2021-11-02 22:34:29,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 625 treesize of output 339 [2021-11-02 22:34:35,932 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-02 22:34:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 315 treesize of output 123 [2021-11-02 22:34:35,955 INFO L354 Elim1Store]: treesize reduction 39, result has 17.0 percent of original size [2021-11-02 22:34:35,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 96 [2021-11-02 22:34:35,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:34:35,970 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 75 treesize of output 69 [2021-11-02 22:34:38,336 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 15 treesize of output 7 [2021-11-02 22:34:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:34:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636737940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:34:38,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:34:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 82 [2021-11-02 22:34:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204428311] [2021-11-02 22:34:38,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-02 22:34:38,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:34:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-02 22:34:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=6436, Unknown=14, NotChecked=0, Total=6642 [2021-11-02 22:34:38,511 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 82 states, 76 states have (on average 1.513157894736842) internal successors, (115), 69 states have internal predecessors, (115), 10 states have call successors, (13), 4 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11)