./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:09:18,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:09:18,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:09:18,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:09:18,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:09:18,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:09:18,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:09:18,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:09:18,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:09:18,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:09:18,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:09:18,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:09:18,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:09:18,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:09:18,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:09:18,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:09:18,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:09:18,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:09:18,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:09:18,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:09:18,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:09:18,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:09:18,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:09:18,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:09:18,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:09:18,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:09:18,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:09:18,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:09:18,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:09:18,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:09:18,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:09:18,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:09:18,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:09:18,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:09:18,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:09:18,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:09:18,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:09:18,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:09:18,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:09:18,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:09:18,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:09:18,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 23:09:19,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:09:19,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:09:19,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:09:19,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:09:19,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:09:19,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:09:19,020 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:09:19,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:09:19,021 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:09:19,021 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:09:19,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:09:19,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:09:19,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:09:19,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:09:19,022 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:09:19,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:09:19,031 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:09:19,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:09:19,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:09:19,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:09:19,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:09:19,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:09:19,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:09:19,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:09:19,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:09:19,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:09:19,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:09:19,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:09:19,034 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_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2021-10-28 23:09:19,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:09:19,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:09:19,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:09:19,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:09:19,286 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:09:19,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-10-28 23:09:19,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/data/7ea7f090e/766d231d96b447099ca4aa2e7d518208/FLAG97094473c [2021-10-28 23:09:19,835 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:09:19,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-10-28 23:09:19,849 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/data/7ea7f090e/766d231d96b447099ca4aa2e7d518208/FLAG97094473c [2021-10-28 23:09:20,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/data/7ea7f090e/766d231d96b447099ca4aa2e7d518208 [2021-10-28 23:09:20,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:09:20,151 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:09:20,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:09:20,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:09:20,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:09:20,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a6e661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20, skipping insertion in model container [2021-10-28 23:09:20,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:09:20,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:09:20,548 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_0864cdec-567c-4d29-b475-0f68bbd96c30/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-10-28 23:09:20,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:09:20,571 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:09:20,650 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_0864cdec-567c-4d29-b475-0f68bbd96c30/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-10-28 23:09:20,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:09:20,692 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:09:20,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20 WrapperNode [2021-10-28 23:09:20,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:09:20,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:09:20,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:09:20,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:09:20,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:09:20,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:09:20,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:09:20,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:09:20,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (1/1) ... [2021-10-28 23:09:20,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:09:20,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:20,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:09:20,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:09:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:09:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:09:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:09:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:09:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:09:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 23:09:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-28 23:09:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-10-28 23:09:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-10-28 23:09:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-10-28 23:09:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-10-28 23:09:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:09:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:09:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:09:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 23:09:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 23:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:09:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:09:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:09:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:09:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:09:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:09:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:09:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:09:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:09:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:09:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:09:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:09:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:09:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:09:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:09:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:09:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:09:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:09:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:09:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:09:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:09:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:09:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:09:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:09:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:09:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:09:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:09:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:09:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:09:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:09:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:09:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:09:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:09:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:09:20,911 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:09:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:09:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:09:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:09:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:09:20,912 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:09:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:09:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:09:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 23:09:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:09:20,913 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:09:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:09:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:09:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:09:20,914 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:09:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:09:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:09:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:09:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:09:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:09:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:09:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:09:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:09:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:09:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:09:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:09:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:09:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:09:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:09:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:09:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:09:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:09:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:09:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:09:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:09:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:09:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:09:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:09:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:09:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:09:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:09:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:09:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:09:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:09:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:09:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:09:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:09:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:09:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:09:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:09:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:09:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:09:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:09:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:09:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:09:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:09:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 23:09:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-28 23:09:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:09:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:09:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-10-28 23:09:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:09:20,924 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-10-28 23:09:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:09:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-10-28 23:09:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-10-28 23:09:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:09:20,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 23:09:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:09:20,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:09:20,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:09:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:09:20,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:09:21,240 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 23:09:21,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:09:21,552 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 23:09:21,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:09:21 BoogieIcfgContainer [2021-10-28 23:09:21,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:09:21,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:09:21,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:09:21,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:09:21,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:09:20" (1/3) ... [2021-10-28 23:09:21,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec8a15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:09:21, skipping insertion in model container [2021-10-28 23:09:21,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:09:20" (2/3) ... [2021-10-28 23:09:21,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec8a15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:09:21, skipping insertion in model container [2021-10-28 23:09:21,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:09:21" (3/3) ... [2021-10-28 23:09:21,568 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-10-28 23:09:21,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:09:21,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-10-28 23:09:21,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:09:21,650 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 [2021-10-28 23:09:21,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-10-28 23:09:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 23:09:21,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:09:21,685 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:21,686 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:21,687 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:21,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1660292181, now seen corresponding path program 1 times [2021-10-28 23:09:21,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:21,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002759137] [2021-10-28 23:09:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:21,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:22,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:22,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002759137] [2021-10-28 23:09:22,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002759137] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:22,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:22,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:09:22,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537929519] [2021-10-28 23:09:22,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:09:22,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:09:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:09:22,051 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:22,320 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-10-28 23:09:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:09:22,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-10-28 23:09:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:22,333 INFO L225 Difference]: With dead ends: 124 [2021-10-28 23:09:22,333 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 23:09:22,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:09:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 23:09:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2021-10-28 23:09:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 83 states have internal predecessors, (92), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 23:09:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-10-28 23:09:22,393 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 18 [2021-10-28 23:09:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:22,393 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-10-28 23:09:22,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-10-28 23:09:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:09:22,397 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:22,397 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] [2021-10-28 23:09:22,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:09:22,398 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash -189324830, now seen corresponding path program 1 times [2021-10-28 23:09:22,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:22,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593618111] [2021-10-28 23:09:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:22,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:22,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:22,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593618111] [2021-10-28 23:09:22,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593618111] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:22,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:22,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:09:22,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438274647] [2021-10-28 23:09:22,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:09:22,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:09:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:09:22,526 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:22,768 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-10-28 23:09:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:09:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 23:09:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:22,770 INFO L225 Difference]: With dead ends: 116 [2021-10-28 23:09:22,771 INFO L226 Difference]: Without dead ends: 116 [2021-10-28 23:09:22,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:09:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-28 23:09:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-10-28 23:09:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 82 states have internal predecessors, (91), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 23:09:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-10-28 23:09:22,782 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 20 [2021-10-28 23:09:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:22,783 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-10-28 23:09:22,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-10-28 23:09:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:09:22,784 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:22,784 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] [2021-10-28 23:09:22,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:09:22,785 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash -189324829, now seen corresponding path program 1 times [2021-10-28 23:09:22,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:22,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689385581] [2021-10-28 23:09:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:22,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:23,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:23,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689385581] [2021-10-28 23:09:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689385581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:23,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:23,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:09:23,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056373090] [2021-10-28 23:09:23,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:09:23,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:09:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:09:23,066 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:23,593 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-10-28 23:09:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:09:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 23:09:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:23,596 INFO L225 Difference]: With dead ends: 135 [2021-10-28 23:09:23,596 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 23:09:23,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:09:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 23:09:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2021-10-28 23:09:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 23:09:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-10-28 23:09:23,607 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 20 [2021-10-28 23:09:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:23,608 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-10-28 23:09:23,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-10-28 23:09:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:09:23,609 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:23,609 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] [2021-10-28 23:09:23,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:09:23,610 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash -447490267, now seen corresponding path program 1 times [2021-10-28 23:09:23,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:23,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792882540] [2021-10-28 23:09:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:23,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:23,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:23,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:23,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792882540] [2021-10-28 23:09:23,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792882540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:23,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:23,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:09:23,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515891025] [2021-10-28 23:09:23,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:09:23,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:09:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:09:23,733 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:23,930 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-10-28 23:09:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:09:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-28 23:09:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:23,933 INFO L225 Difference]: With dead ends: 124 [2021-10-28 23:09:23,933 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 23:09:23,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:09:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 23:09:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-10-28 23:09:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 89 states have internal predecessors, (101), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 23:09:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-10-28 23:09:23,961 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 20 [2021-10-28 23:09:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:23,962 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-10-28 23:09:23,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:09:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-10-28 23:09:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:09:23,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:23,964 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:23,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:09:23,965 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2077322707, now seen corresponding path program 1 times [2021-10-28 23:09:23,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:23,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184938478] [2021-10-28 23:09:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:23,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:24,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:24,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:24,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 23:09:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:09:24,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:24,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184938478] [2021-10-28 23:09:24,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184938478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:24,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978774351] [2021-10-28 23:09:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:24,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:24,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:24,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:09:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:09:24,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:24,440 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 [2021-10-28 23:09:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:24,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978774351] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:24,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:09:24,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-10-28 23:09:24,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5692169] [2021-10-28 23:09:24,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:09:24,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:09:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:09:24,716 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:09:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:24,917 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2021-10-28 23:09:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:09:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-10-28 23:09:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:24,920 INFO L225 Difference]: With dead ends: 135 [2021-10-28 23:09:24,920 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 23:09:24,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:09:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 23:09:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2021-10-28 23:09:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 98 states have internal predecessors, (114), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:09:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-28 23:09:24,927 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 35 [2021-10-28 23:09:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:24,928 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-28 23:09:24,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:09:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-28 23:09:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:09:24,930 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:24,930 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:24,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:25,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:25,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2077322706, now seen corresponding path program 1 times [2021-10-28 23:09:25,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:25,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072092300] [2021-10-28 23:09:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:25,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:25,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 23:09:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:09:25,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:25,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072092300] [2021-10-28 23:09:25,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072092300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:25,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243915807] [2021-10-28 23:09:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:25,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:25,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:25,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:25,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:09:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:25,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:09:25,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:25,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243915807] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:25,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:09:25,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-10-28 23:09:25,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753499486] [2021-10-28 23:09:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:09:25,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:09:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:09:25,676 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:09:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:25,752 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2021-10-28 23:09:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:09:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-10-28 23:09:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:25,754 INFO L225 Difference]: With dead ends: 110 [2021-10-28 23:09:25,754 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 23:09:25,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:09:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 23:09:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 23:09:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 23:09:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-10-28 23:09:25,759 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 35 [2021-10-28 23:09:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:25,759 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-10-28 23:09:25,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:09:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-10-28 23:09:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:09:25,761 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:25,761 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, 1, 1] [2021-10-28 23:09:25,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:25,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:09:25,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -646752834, now seen corresponding path program 1 times [2021-10-28 23:09:25,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:25,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878050904] [2021-10-28 23:09:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:25,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-10-28 23:09:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:09:26,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:26,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878050904] [2021-10-28 23:09:26,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878050904] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:26,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:26,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:09:26,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652197321] [2021-10-28 23:09:26,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:09:26,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:09:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:09:26,143 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:09:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:26,616 INFO L93 Difference]: Finished difference Result 155 states and 177 transitions. [2021-10-28 23:09:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:09:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 23:09:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:26,619 INFO L225 Difference]: With dead ends: 155 [2021-10-28 23:09:26,619 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 23:09:26,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:09:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 23:09:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-10-28 23:09:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.435897435897436) internal successors, (112), 99 states have internal predecessors, (112), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 23:09:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-10-28 23:09:26,626 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 40 [2021-10-28 23:09:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:26,627 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-10-28 23:09:26,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:09:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-10-28 23:09:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:09:26,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:26,629 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, 1, 1] [2021-10-28 23:09:26,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:09:26,629 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash -646750912, now seen corresponding path program 1 times [2021-10-28 23:09:26,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:26,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084629732] [2021-10-28 23:09:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:26,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-10-28 23:09:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:09:26,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:26,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084629732] [2021-10-28 23:09:26,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084629732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:26,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804641255] [2021-10-28 23:09:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:26,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:26,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:09:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:09:26,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:27,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804641255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:27,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:27,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-10-28 23:09:27,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230464640] [2021-10-28 23:09:27,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:09:27,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:09:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:09:27,192 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 23:09:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:28,264 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2021-10-28 23:09:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:09:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2021-10-28 23:09:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:28,266 INFO L225 Difference]: With dead ends: 172 [2021-10-28 23:09:28,266 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 23:09:28,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:09:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 23:09:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2021-10-28 23:09:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 104 states have internal predecessors, (117), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-28 23:09:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-10-28 23:09:28,275 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 40 [2021-10-28 23:09:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:28,275 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-10-28 23:09:28,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 23:09:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-10-28 23:09:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:09:28,276 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:28,277 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:28,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:28,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 23:09:28,486 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -417387441, now seen corresponding path program 2 times [2021-10-28 23:09:28,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:28,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945437495] [2021-10-28 23:09:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:28,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:28,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:28,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:09:28,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:28,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945437495] [2021-10-28 23:09:28,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945437495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:28,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470920628] [2021-10-28 23:09:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:09:28,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:28,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:28,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:09:28,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:09:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:09:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:09:29,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470920628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:29,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:29,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-10-28 23:09:29,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538620778] [2021-10-28 23:09:29,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:09:29,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:09:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:09:29,229 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:09:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:30,971 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-10-28 23:09:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:09:30,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-10-28 23:09:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:30,974 INFO L225 Difference]: With dead ends: 179 [2021-10-28 23:09:30,974 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 23:09:30,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:09:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 23:09:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 128. [2021-10-28 23:09:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.4090909090909092) internal successors, (124), 110 states have internal predecessors, (124), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 23:09:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-10-28 23:09:30,984 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 45 [2021-10-28 23:09:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:30,984 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-10-28 23:09:30,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:09:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-10-28 23:09:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:09:30,986 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:30,986 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:31,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:31,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:31,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -24360431, now seen corresponding path program 1 times [2021-10-28 23:09:31,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:31,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181368064] [2021-10-28 23:09:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:31,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:31,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:31,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:31,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:31,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:09:31,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:31,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181368064] [2021-10-28 23:09:31,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181368064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:31,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656899197] [2021-10-28 23:09:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:31,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:31,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:31,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:31,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:09:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:09:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:31,778 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 [2021-10-28 23:09:31,817 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 [2021-10-28 23:09:32,230 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-28 23:09:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 31 [2021-10-28 23:09:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:32,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656899197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:32,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:32,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-28 23:09:32,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327359410] [2021-10-28 23:09:32,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:09:32,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:09:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:09:32,693 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:09:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:33,633 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2021-10-28 23:09:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:09:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-10-28 23:09:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:33,636 INFO L225 Difference]: With dead ends: 242 [2021-10-28 23:09:33,636 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 23:09:33,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:09:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 23:09:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2021-10-28 23:09:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.4233576642335766) internal successors, (195), 160 states have internal predecessors, (195), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 23:09:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2021-10-28 23:09:33,646 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 45 [2021-10-28 23:09:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:33,647 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2021-10-28 23:09:33,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:09:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2021-10-28 23:09:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:09:33,648 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:33,649 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:33,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:33,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:33,874 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash -24360430, now seen corresponding path program 1 times [2021-10-28 23:09:33,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:33,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007722340] [2021-10-28 23:09:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:33,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:33,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:33,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:33,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:34,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:09:34,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:34,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007722340] [2021-10-28 23:09:34,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007722340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:34,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40524228] [2021-10-28 23:09:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:34,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:34,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:34,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:34,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:09:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:09:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:34,474 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 [2021-10-28 23:09:34,480 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 [2021-10-28 23:09:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-10-28 23:09:34,519 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 [2021-10-28 23:09:34,867 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 23:09:34,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2021-10-28 23:09:34,876 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:09:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-10-28 23:09:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:35,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40524228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:35,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-28 23:09:35,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994966307] [2021-10-28 23:09:35,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:09:35,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:09:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:09:35,268 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:09:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:36,251 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2021-10-28 23:09:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:09:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2021-10-28 23:09:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:36,254 INFO L225 Difference]: With dead ends: 255 [2021-10-28 23:09:36,254 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 23:09:36,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:09:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 23:09:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 196. [2021-10-28 23:09:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 146 states have (on average 1.417808219178082) internal successors, (207), 169 states have internal predecessors, (207), 13 states have call successors, (13), 11 states have call predecessors, (13), 15 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2021-10-28 23:09:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2021-10-28 23:09:36,264 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 45 [2021-10-28 23:09:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:36,264 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2021-10-28 23:09:36,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:09:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2021-10-28 23:09:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:09:36,265 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:36,265 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:36,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:36,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:36,466 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash -325262371, now seen corresponding path program 1 times [2021-10-28 23:09:36,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:36,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791395546] [2021-10-28 23:09:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:36,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:36,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:36,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:36,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 23:09:36,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:36,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791395546] [2021-10-28 23:09:36,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791395546] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:36,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:36,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:09:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148596688] [2021-10-28 23:09:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:09:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:09:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:09:36,617 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:09:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:37,205 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-10-28 23:09:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:09:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-10-28 23:09:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:37,207 INFO L225 Difference]: With dead ends: 267 [2021-10-28 23:09:37,207 INFO L226 Difference]: Without dead ends: 267 [2021-10-28 23:09:37,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:09:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-28 23:09:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 226. [2021-10-28 23:09:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.447674418604651) internal successors, (249), 197 states have internal predecessors, (249), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-28 23:09:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2021-10-28 23:09:37,219 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 49 [2021-10-28 23:09:37,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:37,219 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2021-10-28 23:09:37,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:09:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2021-10-28 23:09:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:09:37,220 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:37,221 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:37,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:09:37,221 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash -325262370, now seen corresponding path program 1 times [2021-10-28 23:09:37,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:37,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667730594] [2021-10-28 23:09:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:37,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:37,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:37,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:37,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 23:09:37,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:37,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667730594] [2021-10-28 23:09:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667730594] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:37,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:09:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323715584] [2021-10-28 23:09:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:09:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:09:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:09:37,424 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:09:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:38,026 INFO L93 Difference]: Finished difference Result 268 states and 333 transitions. [2021-10-28 23:09:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:09:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-10-28 23:09:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:38,032 INFO L225 Difference]: With dead ends: 268 [2021-10-28 23:09:38,032 INFO L226 Difference]: Without dead ends: 268 [2021-10-28 23:09:38,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:09:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-28 23:09:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 226. [2021-10-28 23:09:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.436046511627907) internal successors, (247), 197 states have internal predecessors, (247), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-28 23:09:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2021-10-28 23:09:38,044 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 49 [2021-10-28 23:09:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:38,044 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2021-10-28 23:09:38,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:09:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2021-10-28 23:09:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 23:09:38,045 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:38,046 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:38,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:09:38,046 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 411208802, now seen corresponding path program 2 times [2021-10-28 23:09:38,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:38,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902390180] [2021-10-28 23:09:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:38,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:38,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:38,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-28 23:09:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:09:38,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:38,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902390180] [2021-10-28 23:09:38,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902390180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:38,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641976212] [2021-10-28 23:09:38,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:09:38,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:38,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:38,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:38,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:09:38,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:09:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:09:38,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:09:38,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:38,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641976212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:38,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:38,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-10-28 23:09:38,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705564391] [2021-10-28 23:09:38,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:09:38,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:38,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:09:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:09:38,733 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 23:09:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:39,597 INFO L93 Difference]: Finished difference Result 284 states and 360 transitions. [2021-10-28 23:09:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:09:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-10-28 23:09:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:39,600 INFO L225 Difference]: With dead ends: 284 [2021-10-28 23:09:39,600 INFO L226 Difference]: Without dead ends: 284 [2021-10-28 23:09:39,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:09:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-28 23:09:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-10-28 23:09:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 176 states have (on average 1.4318181818181819) internal successors, (252), 202 states have internal predecessors, (252), 16 states have call successors, (16), 13 states have call predecessors, (16), 18 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-10-28 23:09:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2021-10-28 23:09:39,613 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 50 [2021-10-28 23:09:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2021-10-28 23:09:39,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 23:09:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2021-10-28 23:09:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:09:39,614 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:39,615 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:39,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:39,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:09:39,828 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:39,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash -445053959, now seen corresponding path program 1 times [2021-10-28 23:09:39,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:39,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461907304] [2021-10-28 23:09:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:39,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:39,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:39,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:39,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:40,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:09:40,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:40,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461907304] [2021-10-28 23:09:40,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461907304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:40,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49067931] [2021-10-28 23:09:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:40,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:40,131 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:40,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:09:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:40,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:09:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:40,486 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 [2021-10-28 23:09:40,513 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 23:09:40,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 23:09:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 23:09:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-10-28 23:09:41,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:09:41,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-10-28 23:09:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:41,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49067931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:41,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:41,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-10-28 23:09:41,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046173036] [2021-10-28 23:09:41,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:09:41,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:09:41,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:09:41,224 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:09:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:43,035 INFO L93 Difference]: Finished difference Result 365 states and 449 transitions. [2021-10-28 23:09:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:09:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-10-28 23:09:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:43,038 INFO L225 Difference]: With dead ends: 365 [2021-10-28 23:09:43,038 INFO L226 Difference]: Without dead ends: 365 [2021-10-28 23:09:43,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 23:09:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-28 23:09:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 254. [2021-10-28 23:09:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4329896907216495) internal successors, (278), 222 states have internal predecessors, (278), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 23:09:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 321 transitions. [2021-10-28 23:09:43,060 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 321 transitions. Word has length 52 [2021-10-28 23:09:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:43,061 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 321 transitions. [2021-10-28 23:09:43,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:09:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 321 transitions. [2021-10-28 23:09:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:09:43,062 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:43,062 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:43,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:09:43,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash -445053958, now seen corresponding path program 1 times [2021-10-28 23:09:43,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:43,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859863898] [2021-10-28 23:09:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:43,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:43,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:43,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:09:43,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:43,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859863898] [2021-10-28 23:09:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859863898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:43,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179046850] [2021-10-28 23:09:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:43,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:43,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:43,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:43,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:09:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:43,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 23:09:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:43,966 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 [2021-10-28 23:09:44,094 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 23:09:44,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-10-28 23:09:44,119 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:09:44,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:09:44,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 23:09:44,195 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 [2021-10-28 23:09:45,225 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-10-28 23:09:45,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 62 [2021-10-28 23:09:45,238 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 23:09:45,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2021-10-28 23:09:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:09:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179046850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:45,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:45,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2021-10-28 23:09:45,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787621297] [2021-10-28 23:09:45,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 23:09:45,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 23:09:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-10-28 23:09:45,377 INFO L87 Difference]: Start difference. First operand 254 states and 321 transitions. Second operand has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:09:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:49,056 INFO L93 Difference]: Finished difference Result 355 states and 429 transitions. [2021-10-28 23:09:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:09:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-10-28 23:09:49,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:49,060 INFO L225 Difference]: With dead ends: 355 [2021-10-28 23:09:49,060 INFO L226 Difference]: Without dead ends: 355 [2021-10-28 23:09:49,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 23:09:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-10-28 23:09:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 254. [2021-10-28 23:09:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.422680412371134) internal successors, (276), 222 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 23:09:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 319 transitions. [2021-10-28 23:09:49,075 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 319 transitions. Word has length 52 [2021-10-28 23:09:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:49,077 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 319 transitions. [2021-10-28 23:09:49,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:09:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 319 transitions. [2021-10-28 23:09:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 23:09:49,078 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:49,078 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:49,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:49,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:09:49,302 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash 235136172, now seen corresponding path program 1 times [2021-10-28 23:09:49,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:49,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695816679] [2021-10-28 23:09:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:49,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:09:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:09:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:09:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 23:09:49,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:49,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695816679] [2021-10-28 23:09:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695816679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:09:49,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:09:49,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 23:09:49,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637348747] [2021-10-28 23:09:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:09:49,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:09:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:09:49,451 INFO L87 Difference]: Start difference. First operand 254 states and 319 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:09:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:49,912 INFO L93 Difference]: Finished difference Result 304 states and 375 transitions. [2021-10-28 23:09:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:09:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-10-28 23:09:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:49,915 INFO L225 Difference]: With dead ends: 304 [2021-10-28 23:09:49,915 INFO L226 Difference]: Without dead ends: 298 [2021-10-28 23:09:49,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:09:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-28 23:09:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2021-10-28 23:09:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4123711340206186) internal successors, (274), 222 states have internal predecessors, (274), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 23:09:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2021-10-28 23:09:49,926 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 54 [2021-10-28 23:09:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:49,927 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2021-10-28 23:09:49,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:09:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2021-10-28 23:09:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:09:49,928 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:49,928 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:49,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 23:09:49,929 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 916653259, now seen corresponding path program 1 times [2021-10-28 23:09:49,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:49,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003499524] [2021-10-28 23:09:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:49,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:50,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 23:09:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:50,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:09:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 23:09:50,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:50,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003499524] [2021-10-28 23:09:50,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003499524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:50,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736919017] [2021-10-28 23:09:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:50,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:50,086 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:50,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:09:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:09:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 23:09:50,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736919017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:50,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:50,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-28 23:09:50,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938910802] [2021-10-28 23:09:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:09:50,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:09:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:09:50,627 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 23:09:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:51,552 INFO L93 Difference]: Finished difference Result 391 states and 498 transitions. [2021-10-28 23:09:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:09:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-10-28 23:09:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:51,555 INFO L225 Difference]: With dead ends: 391 [2021-10-28 23:09:51,555 INFO L226 Difference]: Without dead ends: 381 [2021-10-28 23:09:51,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:09:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-28 23:09:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 256. [2021-10-28 23:09:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 224 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-28 23:09:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 319 transitions. [2021-10-28 23:09:51,568 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 319 transitions. Word has length 53 [2021-10-28 23:09:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:51,568 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 319 transitions. [2021-10-28 23:09:51,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 23:09:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 319 transitions. [2021-10-28 23:09:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:09:51,570 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:51,570 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:51,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:51,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:09:51,788 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:51,788 INFO L85 PathProgramCache]: Analyzing trace with hash 668506765, now seen corresponding path program 1 times [2021-10-28 23:09:51,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:51,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784930529] [2021-10-28 23:09:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:51,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:51,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:51,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:51,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 23:09:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:52,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:09:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 23:09:52,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:52,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784930529] [2021-10-28 23:09:52,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784930529] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:52,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823526141] [2021-10-28 23:09:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:52,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:52,412 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:52,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:09:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:52,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:09:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:52,815 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 [2021-10-28 23:09:52,830 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 [2021-10-28 23:09:53,304 INFO L354 Elim1Store]: treesize reduction 97, result has 17.1 percent of original size [2021-10-28 23:09:53,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-10-28 23:09:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:09:53,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823526141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:53,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2021-10-28 23:09:53,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503722906] [2021-10-28 23:09:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:09:53,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:09:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:09:53,678 INFO L87 Difference]: Start difference. First operand 256 states and 319 transitions. Second operand has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:09:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:09:55,600 INFO L93 Difference]: Finished difference Result 404 states and 496 transitions. [2021-10-28 23:09:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:09:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-10-28 23:09:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:09:55,604 INFO L225 Difference]: With dead ends: 404 [2021-10-28 23:09:55,604 INFO L226 Difference]: Without dead ends: 404 [2021-10-28 23:09:55,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:09:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-10-28 23:09:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 326. [2021-10-28 23:09:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 256 states have (on average 1.41796875) internal successors, (363), 286 states have internal predecessors, (363), 22 states have call successors, (22), 18 states have call predecessors, (22), 26 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33) [2021-10-28 23:09:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 418 transitions. [2021-10-28 23:09:55,623 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 418 transitions. Word has length 53 [2021-10-28 23:09:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:09:55,623 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 418 transitions. [2021-10-28 23:09:55,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:09:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 418 transitions. [2021-10-28 23:09:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 23:09:55,625 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:09:55,625 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:09:55,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:09:55,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:55,845 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:09:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:09:55,846 INFO L85 PathProgramCache]: Analyzing trace with hash 668506766, now seen corresponding path program 1 times [2021-10-28 23:09:55,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:09:55,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125137198] [2021-10-28 23:09:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:55,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:09:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:55,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:09:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:55,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:09:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:55,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 23:09:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:56,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:09:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 23:09:56,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:09:56,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125137198] [2021-10-28 23:09:56,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125137198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:56,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124370637] [2021-10-28 23:09:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:09:56,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:09:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:09:56,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:09:56,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:09:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:09:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:09:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:09:56,819 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 [2021-10-28 23:09:56,848 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 [2021-10-28 23:09:59,044 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_12 Int) (v_sll_create_~new_head~0.base_13 Int)) (and (< v_sll_create_~new_head~0.base_12 |c_#StackHeapBarrier|) (= |c_#length| (store (store (store |c_old(#length)| v_sll_create_~new_head~0.base_12 4) v_sll_create_~new_head~0.base_13 4) sll_create_~new_head~0.base 4)))))) is different from true [2021-10-28 23:09:59,341 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-10-28 23:09:59,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 34 [2021-10-28 23:09:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2021-10-28 23:09:59,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124370637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:09:59,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:09:59,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-28 23:09:59,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602703169] [2021-10-28 23:09:59,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:09:59,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:09:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:09:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=243, Unknown=1, NotChecked=32, Total=342 [2021-10-28 23:09:59,695 INFO L87 Difference]: Start difference. First operand 326 states and 418 transitions. Second operand has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:10:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:10:01,018 INFO L93 Difference]: Finished difference Result 409 states and 496 transitions. [2021-10-28 23:10:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:10:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2021-10-28 23:10:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:10:01,021 INFO L225 Difference]: With dead ends: 409 [2021-10-28 23:10:01,021 INFO L226 Difference]: Without dead ends: 409 [2021-10-28 23:10:01,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=144, Invalid=615, Unknown=1, NotChecked=52, Total=812 [2021-10-28 23:10:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-10-28 23:10:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 264. [2021-10-28 23:10:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 203 states have (on average 1.3990147783251232) internal successors, (284), 232 states have internal predecessors, (284), 18 states have call successors, (18), 15 states have call predecessors, (18), 21 states have return successors, (26), 16 states have call predecessors, (26), 17 states have call successors, (26) [2021-10-28 23:10:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2021-10-28 23:10:01,032 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 53 [2021-10-28 23:10:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:10:01,033 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2021-10-28 23:10:01,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:10:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2021-10-28 23:10:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:10:01,034 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:10:01,034 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:10:01,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:10:01,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:01,250 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:10:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:10:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash -38429091, now seen corresponding path program 2 times [2021-10-28 23:10:01,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:10:01,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187197959] [2021-10-28 23:10:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:10:01,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:10:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:01,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:10:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:01,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:10:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:01,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:10:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:10:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:10:01,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:10:01,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187197959] [2021-10-28 23:10:01,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187197959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:01,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826660273] [2021-10-28 23:10:01,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:10:01,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:10:01,719 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:10:01,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:10:02,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:10:02,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:10:02,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-28 23:10:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:10:02,339 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 [2021-10-28 23:10:02,401 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 [2021-10-28 23:10:02,412 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 [2021-10-28 23:10:02,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:10:02,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:10:02,613 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 23:10:02,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-28 23:10:02,624 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 23:10:02,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-28 23:10:03,795 INFO L354 Elim1Store]: treesize reduction 97, result has 24.8 percent of original size [2021-10-28 23:10:03,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 98 [2021-10-28 23:10:03,817 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-10-28 23:10:03,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 53 [2021-10-28 23:10:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:10:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826660273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:03,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:10:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-10-28 23:10:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558481461] [2021-10-28 23:10:03,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:10:03,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:10:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:10:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:10:03,858 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:10:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:10:14,002 INFO L93 Difference]: Finished difference Result 377 states and 456 transitions. [2021-10-28 23:10:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 23:10:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-10-28 23:10:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:10:14,005 INFO L225 Difference]: With dead ends: 377 [2021-10-28 23:10:14,005 INFO L226 Difference]: Without dead ends: 377 [2021-10-28 23:10:14,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 23:10:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-28 23:10:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 307. [2021-10-28 23:10:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3765690376569037) internal successors, (329), 270 states have internal predecessors, (329), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-10-28 23:10:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 382 transitions. [2021-10-28 23:10:14,018 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 382 transitions. Word has length 55 [2021-10-28 23:10:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:10:14,018 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 382 transitions. [2021-10-28 23:10:14,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:10:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 382 transitions. [2021-10-28 23:10:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:10:14,020 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:10:14,020 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:10:14,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:10:14,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:14,242 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:10:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:10:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash 159610384, now seen corresponding path program 1 times [2021-10-28 23:10:14,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:10:14,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927257054] [2021-10-28 23:10:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:10:14,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:10:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:14,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:10:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:14,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:10:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:10:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:14,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:10:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:10:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:10:14,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:10:14,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927257054] [2021-10-28 23:10:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927257054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:14,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39497690] [2021-10-28 23:10:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:10:14,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:10:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:10:14,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:10:14,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:10:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:10:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:10:15,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:10:15,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 23:10:15,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-10-28 23:10:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:10:17,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39497690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:10:17,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:10:17,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-10-28 23:10:17,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492156915] [2021-10-28 23:10:17,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:10:17,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:10:17,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:10:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2021-10-28 23:10:17,886 INFO L87 Difference]: Start difference. First operand 307 states and 382 transitions. Second operand has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:11:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:57,344 INFO L93 Difference]: Finished difference Result 433 states and 522 transitions. [2021-10-28 23:11:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:11:57,345 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2021-10-28 23:11:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:57,347 INFO L225 Difference]: With dead ends: 433 [2021-10-28 23:11:57,347 INFO L226 Difference]: Without dead ends: 424 [2021-10-28 23:11:57,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=286, Invalid=2160, Unknown=4, NotChecked=0, Total=2450 [2021-10-28 23:11:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-10-28 23:11:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 307. [2021-10-28 23:11:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3640167364016735) internal successors, (326), 270 states have internal predecessors, (326), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-10-28 23:11:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2021-10-28 23:11:57,361 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 57 [2021-10-28 23:11:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:57,362 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2021-10-28 23:11:57,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:11:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2021-10-28 23:11:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:11:57,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:57,364 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:57,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:11:57,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:11:57,590 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:11:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash 906045798, now seen corresponding path program 2 times [2021-10-28 23:11:57,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:57,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297374765] [2021-10-28 23:11:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:57,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:57,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:11:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:57,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:11:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 23:11:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:57,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:11:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:11:57,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:11:57,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297374765] [2021-10-28 23:11:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297374765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:11:57,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292933024] [2021-10-28 23:11:57,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:11:57,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:11:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:11:57,853 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:11:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:11:58,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:11:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:11:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:11:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:11:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:11:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292933024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:11:58,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:11:58,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 20 [2021-10-28 23:11:58,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146206300] [2021-10-28 23:11:58,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:11:58,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:11:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:11:58,629 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:11:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:59,699 INFO L93 Difference]: Finished difference Result 443 states and 577 transitions. [2021-10-28 23:11:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:11:59,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 58 [2021-10-28 23:11:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:59,702 INFO L225 Difference]: With dead ends: 443 [2021-10-28 23:11:59,702 INFO L226 Difference]: Without dead ends: 443 [2021-10-28 23:11:59,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:11:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-10-28 23:11:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 313. [2021-10-28 23:11:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 243 states have (on average 1.3621399176954732) internal successors, (331), 275 states have internal predecessors, (331), 22 states have call successors, (22), 17 states have call predecessors, (22), 26 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2021-10-28 23:11:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 388 transitions. [2021-10-28 23:11:59,718 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 388 transitions. Word has length 58 [2021-10-28 23:11:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:59,718 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 388 transitions. [2021-10-28 23:11:59,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:11:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 388 transitions. [2021-10-28 23:11:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 23:11:59,720 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:59,720 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:59,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:11:59,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:11:59,942 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:11:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:59,943 INFO L85 PathProgramCache]: Analyzing trace with hash 733723180, now seen corresponding path program 2 times [2021-10-28 23:11:59,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:59,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2243886] [2021-10-28 23:11:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:59,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:00,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:00,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:12:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:12:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:00,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:12:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:12:00,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:00,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2243886] [2021-10-28 23:12:00,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2243886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:00,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385715156] [2021-10-28 23:12:00,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:12:00,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:00,294 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:00,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:12:00,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:12:00,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:12:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:12:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:12:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385715156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:01,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:01,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2021-10-28 23:12:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058794647] [2021-10-28 23:12:01,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:12:01,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:12:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:12:01,171 INFO L87 Difference]: Start difference. First operand 313 states and 388 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:12:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:02,087 INFO L93 Difference]: Finished difference Result 438 states and 554 transitions. [2021-10-28 23:12:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:12:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2021-10-28 23:12:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:02,090 INFO L225 Difference]: With dead ends: 438 [2021-10-28 23:12:02,091 INFO L226 Difference]: Without dead ends: 438 [2021-10-28 23:12:02,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:12:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-28 23:12:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-10-28 23:12:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 251 states have (on average 1.350597609561753) internal successors, (339), 282 states have internal predecessors, (339), 24 states have call successors, (24), 17 states have call predecessors, (24), 26 states have return successors, (38), 23 states have call predecessors, (38), 23 states have call successors, (38) [2021-10-28 23:12:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2021-10-28 23:12:02,105 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 60 [2021-10-28 23:12:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2021-10-28 23:12:02,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:12:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2021-10-28 23:12:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:12:02,107 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:02,107 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:02,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:12:02,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:12:02,330 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -576100065, now seen corresponding path program 1 times [2021-10-28 23:12:02,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:02,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953407614] [2021-10-28 23:12:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:02,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:02,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:12:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:12:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:02,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 23:12:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:12:02,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:02,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953407614] [2021-10-28 23:12:02,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953407614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:02,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984362369] [2021-10-28 23:12:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:02,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:02,594 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:02,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:12:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:12:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:12:03,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984362369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:03,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:03,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-10-28 23:12:03,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429077352] [2021-10-28 23:12:03,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:12:03,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:03,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:12:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:12:03,508 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 23:12:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:05,234 INFO L93 Difference]: Finished difference Result 419 states and 515 transitions. [2021-10-28 23:12:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:12:05,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-10-28 23:12:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:05,237 INFO L225 Difference]: With dead ends: 419 [2021-10-28 23:12:05,237 INFO L226 Difference]: Without dead ends: 369 [2021-10-28 23:12:05,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 23:12:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-28 23:12:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 309. [2021-10-28 23:12:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 268 states have internal predecessors, (319), 24 states have call successors, (24), 17 states have call predecessors, (24), 23 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2021-10-28 23:12:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 378 transitions. [2021-10-28 23:12:05,249 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 378 transitions. Word has length 61 [2021-10-28 23:12:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:05,250 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 378 transitions. [2021-10-28 23:12:05,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 23:12:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 378 transitions. [2021-10-28 23:12:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:12:05,251 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:05,252 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:05,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-28 23:12:05,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:12:05,478 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:05,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1277164643, now seen corresponding path program 2 times [2021-10-28 23:12:05,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:05,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927759812] [2021-10-28 23:12:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:05,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:05,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:05,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:12:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:05,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:12:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 23:12:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 23:12:05,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:05,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927759812] [2021-10-28 23:12:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927759812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:05,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670967387] [2021-10-28 23:12:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:12:05,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:05,825 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:05,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:12:06,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:12:06,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:12:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:12:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:06,496 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 [2021-10-28 23:12:06,525 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 [2021-10-28 23:12:06,737 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 23:12:06,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 24 [2021-10-28 23:12:07,528 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-28 23:12:07,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-10-28 23:12:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 23:12:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670967387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:07,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:07,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-10-28 23:12:07,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925357244] [2021-10-28 23:12:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:12:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:12:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:12:07,611 INFO L87 Difference]: Start difference. First operand 309 states and 378 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:12:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:09,096 INFO L93 Difference]: Finished difference Result 394 states and 472 transitions. [2021-10-28 23:12:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:12:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2021-10-28 23:12:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:09,099 INFO L225 Difference]: With dead ends: 394 [2021-10-28 23:12:09,099 INFO L226 Difference]: Without dead ends: 394 [2021-10-28 23:12:09,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:12:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-28 23:12:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 339. [2021-10-28 23:12:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3408239700374531) internal successors, (358), 294 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-28 23:12:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2021-10-28 23:12:09,110 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 61 [2021-10-28 23:12:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2021-10-28 23:12:09,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:12:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2021-10-28 23:12:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:12:09,112 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:09,112 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:09,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:12:09,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:09,326 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_insertErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1277164642, now seen corresponding path program 1 times [2021-10-28 23:12:09,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:09,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430380343] [2021-10-28 23:12:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:09,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:09,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:09,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:09,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:12:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:12:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 23:12:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 23:12:09,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:09,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430380343] [2021-10-28 23:12:09,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430380343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:09,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671438848] [2021-10-28 23:12:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:09,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:09,670 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:09,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:12:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:12:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:10,509 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 [2021-10-28 23:12:10,660 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 23:12:10,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 19 [2021-10-28 23:12:10,848 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 23:12:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 23:12:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 23:12:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671438848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:10,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2021-10-28 23:12:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890907678] [2021-10-28 23:12:10,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:12:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:12:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:12:10,875 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:12:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:11,705 INFO L93 Difference]: Finished difference Result 369 states and 447 transitions. [2021-10-28 23:12:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:12:11,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2021-10-28 23:12:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:11,708 INFO L225 Difference]: With dead ends: 369 [2021-10-28 23:12:11,708 INFO L226 Difference]: Without dead ends: 369 [2021-10-28 23:12:11,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:12:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-28 23:12:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 339. [2021-10-28 23:12:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3333333333333333) internal successors, (356), 294 states have internal predecessors, (356), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-28 23:12:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 419 transitions. [2021-10-28 23:12:11,720 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 419 transitions. Word has length 61 [2021-10-28 23:12:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:11,720 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 419 transitions. [2021-10-28 23:12:11,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:12:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 419 transitions. [2021-10-28 23:12:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:12:11,722 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:11,722 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:11,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:12:11,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:12:11,950 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 534522131, now seen corresponding path program 2 times [2021-10-28 23:12:11,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:11,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392902508] [2021-10-28 23:12:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:11,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:12,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:12,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:12:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:12,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 23:12:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-28 23:12:12,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:12,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392902508] [2021-10-28 23:12:12,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392902508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:12,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592851721] [2021-10-28 23:12:12,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:12:12,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:12,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:12,146 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:12,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:12:13,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:12:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:12:13,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:12:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-28 23:12:13,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592851721] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:13,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:13,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 23:12:13,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018459238] [2021-10-28 23:12:13,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:12:13,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:12:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:12:13,314 INFO L87 Difference]: Start difference. First operand 339 states and 419 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 23:12:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:14,745 INFO L93 Difference]: Finished difference Result 548 states and 709 transitions. [2021-10-28 23:12:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:12:14,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2021-10-28 23:12:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:14,748 INFO L225 Difference]: With dead ends: 548 [2021-10-28 23:12:14,748 INFO L226 Difference]: Without dead ends: 538 [2021-10-28 23:12:14,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:12:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-28 23:12:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 341. [2021-10-28 23:12:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 269 states have (on average 1.3308550185873607) internal successors, (358), 296 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-28 23:12:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 421 transitions. [2021-10-28 23:12:14,761 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 421 transitions. Word has length 61 [2021-10-28 23:12:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:14,762 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 421 transitions. [2021-10-28 23:12:14,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 23:12:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 421 transitions. [2021-10-28 23:12:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:12:14,763 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:14,764 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:14,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:12:14,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:12:14,978 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash 887610513, now seen corresponding path program 3 times [2021-10-28 23:12:14,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:14,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62891278] [2021-10-28 23:12:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:14,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:15,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:15,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:15,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:12:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:16,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 23:12:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 23:12:16,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:16,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62891278] [2021-10-28 23:12:16,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62891278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:16,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590103744] [2021-10-28 23:12:16,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:12:16,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:16,122 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:16,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:12:16,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 23:12:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:12:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:12:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:16,863 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 [2021-10-28 23:12:16,873 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 [2021-10-28 23:12:18,962 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_16 Int)) (and (< v_sll_create_~new_head~0.base_16 |c_#StackHeapBarrier|) (= (store (store |c_old(#valid)| v_sll_create_~new_head~0.base_16 1) sll_create_~new_head~0.base 1) |c_#valid|))))) is different from true [2021-10-28 23:12:21,864 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-10-28 23:12:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 39 [2021-10-28 23:12:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 18 refuted. 3 times theorem prover too weak. 9 trivial. 17 not checked. [2021-10-28 23:12:22,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590103744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:22,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:22,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-10-28 23:12:22,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979210134] [2021-10-28 23:12:22,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:12:22,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:12:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=360, Unknown=2, NotChecked=40, Total=506 [2021-10-28 23:12:22,287 INFO L87 Difference]: Start difference. First operand 341 states and 421 transitions. Second operand has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:12:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:33,022 INFO L93 Difference]: Finished difference Result 476 states and 578 transitions. [2021-10-28 23:12:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:12:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-10-28 23:12:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:33,026 INFO L225 Difference]: With dead ends: 476 [2021-10-28 23:12:33,026 INFO L226 Difference]: Without dead ends: 476 [2021-10-28 23:12:33,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=198, Invalid=733, Unknown=3, NotChecked=58, Total=992 [2021-10-28 23:12:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-28 23:12:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2021-10-28 23:12:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.343558282208589) internal successors, (438), 354 states have internal predecessors, (438), 30 states have call successors, (30), 22 states have call predecessors, (30), 30 states have return successors, (44), 30 states have call predecessors, (44), 29 states have call successors, (44) [2021-10-28 23:12:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 512 transitions. [2021-10-28 23:12:33,039 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 512 transitions. Word has length 61 [2021-10-28 23:12:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:33,040 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 512 transitions. [2021-10-28 23:12:33,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:12:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 512 transitions. [2021-10-28 23:12:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 23:12:33,042 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:33,042 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:33,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:12:33,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:33,258 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash 887610514, now seen corresponding path program 2 times [2021-10-28 23:12:33,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:33,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761392542] [2021-10-28 23:12:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:33,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:33,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:33,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 23:12:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:34,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 23:12:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 23:12:34,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761392542] [2021-10-28 23:12:34,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761392542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195357255] [2021-10-28 23:12:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:12:34,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:12:34,443 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:12:34,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:12:35,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:12:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:12:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:12:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:12:35,252 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 [2021-10-28 23:12:35,256 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 [2021-10-28 23:12:35,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-10-28 23:12:35,278 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 [2021-10-28 23:12:36,486 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-10-28 23:12:36,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 49 [2021-10-28 23:12:36,499 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:12:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-10-28 23:12:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 23:12:36,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195357255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:12:36,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:12:36,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-10-28 23:12:36,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591166788] [2021-10-28 23:12:36,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:12:36,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:12:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:12:36,943 INFO L87 Difference]: Start difference. First operand 407 states and 512 transitions. Second operand has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:12:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:42,265 INFO L93 Difference]: Finished difference Result 520 states and 629 transitions. [2021-10-28 23:12:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:12:42,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-10-28 23:12:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:42,268 INFO L225 Difference]: With dead ends: 520 [2021-10-28 23:12:42,268 INFO L226 Difference]: Without dead ends: 520 [2021-10-28 23:12:42,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:12:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-10-28 23:12:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 349. [2021-10-28 23:12:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 276 states have (on average 1.326086956521739) internal successors, (366), 304 states have internal predecessors, (366), 26 states have call successors, (26), 19 states have call predecessors, (26), 26 states have return successors, (38), 25 states have call predecessors, (38), 25 states have call successors, (38) [2021-10-28 23:12:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 430 transitions. [2021-10-28 23:12:42,281 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 430 transitions. Word has length 61 [2021-10-28 23:12:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:42,281 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 430 transitions. [2021-10-28 23:12:42,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:12:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 430 transitions. [2021-10-28 23:12:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 23:12:42,283 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:42,283 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:42,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:12:42,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:12:42,498 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_destroyErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 423798166, now seen corresponding path program 1 times [2021-10-28 23:12:42,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:42,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123414821] [2021-10-28 23:12:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:42,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:42,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:42,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:12:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:12:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:42,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:12:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:12:42,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:42,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123414821] [2021-10-28 23:12:42,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123414821] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:12:42,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:12:42,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:12:42,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201409441] [2021-10-28 23:12:42,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:12:42,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:12:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:12:42,698 INFO L87 Difference]: Start difference. First operand 349 states and 430 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:12:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:43,605 INFO L93 Difference]: Finished difference Result 391 states and 477 transitions. [2021-10-28 23:12:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:12:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-10-28 23:12:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:43,608 INFO L225 Difference]: With dead ends: 391 [2021-10-28 23:12:43,608 INFO L226 Difference]: Without dead ends: 391 [2021-10-28 23:12:43,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:12:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-10-28 23:12:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 363. [2021-10-28 23:12:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 288 states have (on average 1.3298611111111112) internal successors, (383), 315 states have internal predecessors, (383), 27 states have call successors, (27), 20 states have call predecessors, (27), 28 states have return successors, (41), 27 states have call predecessors, (41), 26 states have call successors, (41) [2021-10-28 23:12:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2021-10-28 23:12:43,619 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 64 [2021-10-28 23:12:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:43,619 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2021-10-28 23:12:43,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:12:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2021-10-28 23:12:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 23:12:43,621 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:43,621 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 23:12:43,622 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_destroyErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash 423798167, now seen corresponding path program 1 times [2021-10-28 23:12:43,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:43,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999692945] [2021-10-28 23:12:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:43,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:43,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:12:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:43,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-28 23:12:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:43,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 23:12:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 23:12:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:43,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 23:12:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:12:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 23:12:43,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:12:43,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999692945] [2021-10-28 23:12:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999692945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:12:43,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:12:43,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 23:12:43,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44306623] [2021-10-28 23:12:43,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:12:43,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:12:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:12:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:12:43,885 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:12:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:12:44,691 INFO L93 Difference]: Finished difference Result 401 states and 487 transitions. [2021-10-28 23:12:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:12:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-10-28 23:12:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:12:44,694 INFO L225 Difference]: With dead ends: 401 [2021-10-28 23:12:44,694 INFO L226 Difference]: Without dead ends: 401 [2021-10-28 23:12:44,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:12:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-10-28 23:12:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2021-10-28 23:12:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 320 states have internal predecessors, (392), 27 states have call successors, (27), 20 states have call predecessors, (27), 27 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-10-28 23:12:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2021-10-28 23:12:44,705 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 64 [2021-10-28 23:12:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:12:44,706 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2021-10-28 23:12:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:12:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2021-10-28 23:12:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 23:12:44,707 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:12:44,708 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:44,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-28 23:12:44,708 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-28 23:12:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:12:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash 808154331, now seen corresponding path program 1 times [2021-10-28 23:12:44,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:12:44,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505501732] [2021-10-28 23:12:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:12:44,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:12:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:12:44,729 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:12:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:12:44,776 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:12:44,777 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:12:44,778 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr4ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:12:44,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr0REQUIRES_VIOLATION [2021-10-28 23:12:44,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr1REQUIRES_VIOLATION [2021-10-28 23:12:44,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:12:44,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:12:44,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:12:44,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr0REQUIRES_VIOLATION [2021-10-28 23:12:44,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr1REQUIRES_VIOLATION [2021-10-28 23:12:44,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr0REQUIRES_VIOLATION [2021-10-28 23:12:44,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr1REQUIRES_VIOLATION [2021-10-28 23:12:44,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:12:44,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:12:44,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:12:44,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:12:44,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:12:44,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr0REQUIRES_VIOLATION [2021-10-28 23:12:44,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr1REQUIRES_VIOLATION [2021-10-28 23:12:44,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr2REQUIRES_VIOLATION [2021-10-28 23:12:44,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr3REQUIRES_VIOLATION [2021-10-28 23:12:44,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr4REQUIRES_VIOLATION [2021-10-28 23:12:44,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr5REQUIRES_VIOLATION [2021-10-28 23:12:44,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr6REQUIRES_VIOLATION [2021-10-28 23:12:44,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr7REQUIRES_VIOLATION [2021-10-28 23:12:44,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr8REQUIRES_VIOLATION [2021-10-28 23:12:44,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr9REQUIRES_VIOLATION [2021-10-28 23:12:44,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-28 23:12:44,787 INFO L731 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:12:44,791 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:12:44,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:12:44 BoogieIcfgContainer [2021-10-28 23:12:44,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:12:44,832 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:12:44,832 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:12:44,832 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:12:44,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:09:21" (3/4) ... [2021-10-28 23:12:44,834 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:12:44,882 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:12:44,883 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:12:44,884 INFO L168 Benchmark]: Toolchain (without parser) took 204731.94 ms. Allocated memory was 86.0 MB in the beginning and 237.0 MB in the end (delta: 151.0 MB). Free memory was 60.2 MB in the beginning and 83.6 MB in the end (delta: -23.4 MB). Peak memory consumption was 127.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:12:44,884 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory is still 58.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:12:44,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 540.98 ms. Allocated memory is still 86.0 MB. Free memory was 60.0 MB in the beginning and 53.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:12:44,885 INFO L168 Benchmark]: Boogie Preprocessor took 122.20 ms. Allocated memory is still 86.0 MB. Free memory was 53.8 MB in the beginning and 50.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:12:44,885 INFO L168 Benchmark]: RCFGBuilder took 738.56 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 50.9 MB in the beginning and 75.8 MB in the end (delta: -24.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:12:44,886 INFO L168 Benchmark]: TraceAbstraction took 203271.46 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 75.3 MB in the beginning and 86.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 113.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:12:44,886 INFO L168 Benchmark]: Witness Printer took 51.02 ms. Allocated memory is still 237.0 MB. Free memory was 86.7 MB in the beginning and 83.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:12:44,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory is still 58.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 540.98 ms. Allocated memory is still 86.0 MB. Free memory was 60.0 MB in the beginning and 53.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 122.20 ms. Allocated memory is still 86.0 MB. Free memory was 53.8 MB in the beginning and 50.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 738.56 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 50.9 MB in the beginning and 75.8 MB in the end (delta: -24.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 203271.46 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 75.3 MB in the beginning and 86.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 113.1 MB. Max. memory is 16.1 GB. * Witness Printer took 51.02 ms. Allocated memory is still 237.0 MB. Free memory was 86.7 MB in the beginning and 83.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 641]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L627] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L620] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L627] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); VAL [len=2, s={3:0}] [L628] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L575] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L576] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L582] head = new_head VAL [\old(len)=2, head={-1:0}, len=1, new_head={-1:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0, len--=1, new_head={-1:0}] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L582] head = new_head VAL [\old(len)=2, head={-2:0}, len=0, new_head={-2:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, new_head={-2:0}] [L576] COND FALSE !(len-- > 0) [L584] return head; VAL [\old(len)=2, \result={-2:0}, head={-2:0}, len=-1, new_head={-2:0}] [L628] RET, EXPR sll_create(len) VAL [len=2, s={3:0}, sll_create(len)={-2:0}] [L628] SLL s = sll_create(len); [L629] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L620] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L629] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={3:0}] [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; VAL [i=0, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={3:0}] [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}] [L636] CALL, EXPR sll_length(s) VAL [head={-2:0}] [L587] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L588] COND TRUE \read(head) [L589] len++ VAL [head={-2:0}, head={-2:0}, len=1] [L590] EXPR head->next VAL [head={-2:0}, head={-2:0}, head->next={-1:0}, len=1] [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ VAL [head={-1:0}, head={-2:0}, len=2] [L590] EXPR head->next VAL [head={-2:0}, head={-1:0}, head->next={0:0}, len=2] [L590] head = head->next [L588] COND FALSE !(\read(head)) VAL [head={0:0}, head={-2:0}, len=2] [L592] return len; VAL [\result=2, head={0:0}, head={-2:0}, len=2] [L636] RET, EXPR sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}, sll_length(s)=2] [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() VAL [i=0, k=1, len=2, s={3:0}] - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 116 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 203.1s, OverallIterations: 33, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 153.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2809 SDtfs, 8137 SDslu, 15349 SDs, 0 SdLazy, 25166 SolverSat, 2022 SolverUnsat, 95 SolverUnknown, 0 SolverNotchecked, 128.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2080 GetRequests, 1265 SyntacticMatches, 27 SemanticMatches, 788 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 38.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=407occurred in iteration=29, InterpolantAutomatonStates: 472, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 32 MinimizatonAttempts, 2160 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 33.0s InterpolantComputationTime, 2769 NumberOfCodeBlocks, 2769 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 2652 ConstructedInterpolants, 327 QuantifiedInterpolants, 41221 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5550 ConjunctsInSsa, 445 ConjunctsInUnsatCore, 54 InterpolantComputations, 12 PerfectInterpolantSequences, 800/1391 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:12:45,122 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 23:12:45,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0864cdec-567c-4d29-b475-0f68bbd96c30/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...