./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN --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 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:36:01,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:36:01,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:36:01,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:36:01,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:36:01,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:36:01,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:36:01,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:36:01,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:36:01,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:36:01,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:36:01,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:36:01,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:36:01,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:36:01,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:36:01,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:36:01,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:36:01,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:36:01,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:36:01,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:36:01,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:36:01,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:36:01,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:36:01,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:36:01,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:36:01,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:36:01,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:36:01,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:36:01,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:36:01,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:36:01,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:36:01,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:36:01,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:36:01,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:36:01,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:36:01,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:36:01,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:36:01,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:36:01,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:36:01,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:36:01,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:36:01,665 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-20 12:36:01,705 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:36:01,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:36:01,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:36:01,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:36:01,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:36:01,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:36:01,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:36:01,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:36:01,709 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:36:01,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:36:01,710 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:36:01,711 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:36:01,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:36:01,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:36:01,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:36:01,711 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:36:01,712 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:36:01,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:36:01,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:36:01,712 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:36:01,713 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:36:01,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:36:01,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:36:01,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:36:01,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:36:01,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:36:01,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:36:01,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:36:01,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:36:01,715 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_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2022-11-20 12:36:02,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:36:02,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:36:02,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:36:02,037 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:36:02,038 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:36:02,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-20 12:36:05,300 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:36:05,560 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:36:05,560 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-20 12:36:05,575 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/data/85fe83b49/4ef433bcc0f14c4f8cc7f425f94041a3/FLAG9fb1ecdea [2022-11-20 12:36:05,589 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/data/85fe83b49/4ef433bcc0f14c4f8cc7f425f94041a3 [2022-11-20 12:36:05,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:36:05,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:36:05,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:36:05,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:36:05,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:36:05,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:36:05" (1/1) ... [2022-11-20 12:36:05,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7769bdca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:05, skipping insertion in model container [2022-11-20 12:36:05,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:36:05" (1/1) ... [2022-11-20 12:36:05,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:36:05,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:36:05,935 WARN L237 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_d3c936ec-9fdb-40da-886c-80ab0b07d406/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-20 12:36:05,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:36:05,955 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:36:06,042 WARN L237 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_d3c936ec-9fdb-40da-886c-80ab0b07d406/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-20 12:36:06,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:36:06,086 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:36:06,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06 WrapperNode [2022-11-20 12:36:06,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:36:06,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:36:06,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:36:06,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:36:06,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,151 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-20 12:36:06,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:36:06,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:36:06,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:36:06,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:36:06,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,201 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:36:06,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:36:06,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:36:06,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:36:06,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (1/1) ... [2022-11-20 12:36:06,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:36:06,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:06,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:36:06,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-20 12:36:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-20 12:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 12:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2022-11-20 12:36:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2022-11-20 12:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 12:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 12:36:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:36:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:36:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:36:06,420 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:36:06,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:36:06,466 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-20 12:36:06,979 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:36:06,994 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:36:06,998 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-20 12:36:07,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:36:07 BoogieIcfgContainer [2022-11-20 12:36:07,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:36:07,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:36:07,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:36:07,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:36:07,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:36:05" (1/3) ... [2022-11-20 12:36:07,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fd4c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:36:07, skipping insertion in model container [2022-11-20 12:36:07,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:36:06" (2/3) ... [2022-11-20 12:36:07,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fd4c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:36:07, skipping insertion in model container [2022-11-20 12:36:07,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:36:07" (3/3) ... [2022-11-20 12:36:07,041 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2022-11-20 12:36:07,071 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:36:07,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-20 12:36:07,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:36:07,122 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56b517c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:36:07,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-20 12:36:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 116 states have internal predecessors, (141), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:36:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:36:07,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:07,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:07,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash -46006015, now seen corresponding path program 1 times [2022-11-20 12:36:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643960646] [2022-11-20 12:36:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:07,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643960646] [2022-11-20 12:36:07,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643960646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:07,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:07,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:36:07,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238850040] [2022-11-20 12:36:07,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:36:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:36:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:07,512 INFO L87 Difference]: Start difference. First operand has 121 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 116 states have internal predecessors, (141), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:07,575 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2022-11-20 12:36:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:36:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 12:36:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:07,587 INFO L225 Difference]: With dead ends: 128 [2022-11-20 12:36:07,587 INFO L226 Difference]: Without dead ends: 122 [2022-11-20 12:36:07,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:07,593 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 7 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:07,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 258 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:36:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-20 12:36:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2022-11-20 12:36:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 112 states have internal predecessors, (126), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:36:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-11-20 12:36:07,642 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 10 [2022-11-20 12:36:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:07,642 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-11-20 12:36:07,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:07,643 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-11-20 12:36:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:36:07,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:07,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:07,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:36:07,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 244152622, now seen corresponding path program 1 times [2022-11-20 12:36:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:07,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831497729] [2022-11-20 12:36:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:07,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831497729] [2022-11-20 12:36:07,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831497729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:07,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:07,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:36:07,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990725958] [2022-11-20 12:36:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:07,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:36:07,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:07,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:36:07,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:07,898 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:08,017 INFO L93 Difference]: Finished difference Result 151 states and 169 transitions. [2022-11-20 12:36:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:36:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:36:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:08,021 INFO L225 Difference]: With dead ends: 151 [2022-11-20 12:36:08,021 INFO L226 Difference]: Without dead ends: 151 [2022-11-20 12:36:08,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:08,023 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 40 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:08,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 234 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-20 12:36:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2022-11-20 12:36:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.7605633802816902) internal successors, (125), 111 states have internal predecessors, (125), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:36:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-11-20 12:36:08,034 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 13 [2022-11-20 12:36:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:08,035 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-11-20 12:36:08,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-11-20 12:36:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:36:08,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:08,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:08,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:36:08,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 244152621, now seen corresponding path program 1 times [2022-11-20 12:36:08,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:08,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849782682] [2022-11-20 12:36:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849782682] [2022-11-20 12:36:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849782682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:08,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:08,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:36:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050618913] [2022-11-20 12:36:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:08,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:36:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:36:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:08,103 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:08,216 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-11-20 12:36:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:36:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:36:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:08,218 INFO L225 Difference]: With dead ends: 150 [2022-11-20 12:36:08,218 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 12:36:08,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:08,220 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 39 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:08,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 228 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 12:36:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2022-11-20 12:36:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 71 states have (on average 1.7464788732394365) internal successors, (124), 110 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:36:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-11-20 12:36:08,230 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 13 [2022-11-20 12:36:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:08,230 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-11-20 12:36:08,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-11-20 12:36:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:36:08,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:08,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:08,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:36:08,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1021253985, now seen corresponding path program 1 times [2022-11-20 12:36:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:08,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23721423] [2022-11-20 12:36:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:08,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23721423] [2022-11-20 12:36:08,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23721423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:08,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:08,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:36:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630036834] [2022-11-20 12:36:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:36:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:36:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:08,288 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:08,357 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2022-11-20 12:36:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:36:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 12:36:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:08,359 INFO L225 Difference]: With dead ends: 112 [2022-11-20 12:36:08,359 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 12:36:08,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:36:08,361 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 35 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:08,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 162 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 12:36:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-20 12:36:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 108 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:36:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2022-11-20 12:36:08,368 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 14 [2022-11-20 12:36:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:08,369 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2022-11-20 12:36:08,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2022-11-20 12:36:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:36:08,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:08,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:08,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:36:08,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting sll_appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1021253984, now seen corresponding path program 1 times [2022-11-20 12:36:08,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358853219] [2022-11-20 12:36:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:08,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358853219] [2022-11-20 12:36:08,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358853219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:08,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:08,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:36:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658248992] [2022-11-20 12:36:08,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:08,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:36:08,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:36:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:36:08,488 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:08,612 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2022-11-20 12:36:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:36:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 12:36:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:08,614 INFO L225 Difference]: With dead ends: 213 [2022-11-20 12:36:08,614 INFO L226 Difference]: Without dead ends: 213 [2022-11-20 12:36:08,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:36:08,616 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 162 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:08,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 889 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-20 12:36:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 139. [2022-11-20 12:36:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 97 states have (on average 1.7010309278350515) internal successors, (165), 134 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:36:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2022-11-20 12:36:08,625 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 14 [2022-11-20 12:36:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:08,625 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2022-11-20 12:36:08,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2022-11-20 12:36:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:36:08,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:08,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:08,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:36:08,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sll_appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:08,627 INFO L85 PathProgramCache]: Analyzing trace with hash -790832604, now seen corresponding path program 1 times [2022-11-20 12:36:08,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875460350] [2022-11-20 12:36:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:08,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:08,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875460350] [2022-11-20 12:36:08,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875460350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:36:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142478910] [2022-11-20 12:36:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:08,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:08,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:36:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:36:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:08,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:36:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:08,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:08,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142478910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:08,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:36:08,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 12:36:08,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117112502] [2022-11-20 12:36:08,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:08,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:36:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:08,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:36:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:36:08,928 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:08,994 INFO L93 Difference]: Finished difference Result 192 states and 229 transitions. [2022-11-20 12:36:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:36:08,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:36:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:08,996 INFO L225 Difference]: With dead ends: 192 [2022-11-20 12:36:08,996 INFO L226 Difference]: Without dead ends: 192 [2022-11-20 12:36:08,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:36:08,997 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 91 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:08,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 515 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-20 12:36:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2022-11-20 12:36:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 112 states have (on average 1.6517857142857142) internal successors, (185), 149 states have internal predecessors, (185), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:36:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2022-11-20 12:36:09,006 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 16 [2022-11-20 12:36:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:09,007 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2022-11-20 12:36:09,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2022-11-20 12:36:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 12:36:09,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:09,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:09,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:36:09,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 12:36:09,214 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting sll_appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash -924446423, now seen corresponding path program 1 times [2022-11-20 12:36:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:09,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247951540] [2022-11-20 12:36:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:09,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247951540] [2022-11-20 12:36:09,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247951540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:36:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759525587] [2022-11-20 12:36:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:09,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:09,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:09,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:36:09,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:36:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:36:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:09,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:09,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759525587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:09,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:36:09,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-20 12:36:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482755705] [2022-11-20 12:36:09,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:36:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:36:09,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:36:09,587 INFO L87 Difference]: Start difference. First operand 156 states and 193 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:09,750 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2022-11-20 12:36:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:36:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 12:36:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:09,752 INFO L225 Difference]: With dead ends: 238 [2022-11-20 12:36:09,752 INFO L226 Difference]: Without dead ends: 238 [2022-11-20 12:36:09,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:36:09,755 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 300 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:09,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1261 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-20 12:36:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 164. [2022-11-20 12:36:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 120 states have (on average 1.6083333333333334) internal successors, (193), 157 states have internal predecessors, (193), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:36:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 201 transitions. [2022-11-20 12:36:09,776 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 201 transitions. Word has length 18 [2022-11-20 12:36:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:09,776 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 201 transitions. [2022-11-20 12:36:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 201 transitions. [2022-11-20 12:36:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:36:09,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:09,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:09,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:36:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:09,987 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting sll_appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash 760370116, now seen corresponding path program 2 times [2022-11-20 12:36:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954533624] [2022-11-20 12:36:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:36:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:10,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954533624] [2022-11-20 12:36:10,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954533624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:10,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:10,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:36:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637821218] [2022-11-20 12:36:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:10,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:36:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:36:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:36:10,122 INFO L87 Difference]: Start difference. First operand 164 states and 201 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:10,170 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2022-11-20 12:36:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:36:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 12:36:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:10,171 INFO L225 Difference]: With dead ends: 182 [2022-11-20 12:36:10,172 INFO L226 Difference]: Without dead ends: 182 [2022-11-20 12:36:10,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:36:10,177 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 164 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:10,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 638 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:36:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-20 12:36:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-11-20 12:36:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 121 states have (on average 1.603305785123967) internal successors, (194), 158 states have internal predecessors, (194), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:36:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2022-11-20 12:36:10,188 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 26 [2022-11-20 12:36:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:10,189 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2022-11-20 12:36:10,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2022-11-20 12:36:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:36:10,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:10,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:10,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:36:10,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting sll_appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1087676229, now seen corresponding path program 2 times [2022-11-20 12:36:10,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807611405] [2022-11-20 12:36:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:36:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:10,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807611405] [2022-11-20 12:36:10,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807611405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:36:10,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744017179] [2022-11-20 12:36:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:36:10,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:10,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:36:10,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:36:10,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:36:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:36:10,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:36:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:10,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:36:10,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:36:10,865 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:36:10,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:36:10,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:10,960 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:36:10,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:36:10,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:11,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:11,033 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:36:11,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:36:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:11,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:15,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744017179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:15,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:36:15,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 7 [2022-11-20 12:36:15,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585843306] [2022-11-20 12:36:15,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:15,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:36:15,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:15,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:36:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:36:15,558 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:15,692 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2022-11-20 12:36:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:36:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 12:36:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:15,694 INFO L225 Difference]: With dead ends: 163 [2022-11-20 12:36:15,694 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 12:36:15,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:36:15,695 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 136 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:15,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 335 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 12:36:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 12:36:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-20 12:36:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 121 states have (on average 1.5702479338842976) internal successors, (190), 156 states have internal predecessors, (190), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:36:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2022-11-20 12:36:15,701 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 26 [2022-11-20 12:36:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:15,701 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2022-11-20 12:36:15,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2022-11-20 12:36:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:36:15,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:15,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:15,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:36:15,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:15,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting sll_appendErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 320066679, now seen corresponding path program 1 times [2022-11-20 12:36:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:15,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085208547] [2022-11-20 12:36:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:36:16,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085208547] [2022-11-20 12:36:16,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085208547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:16,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:16,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:36:16,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327754740] [2022-11-20 12:36:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:16,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:36:16,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:36:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:36:16,064 INFO L87 Difference]: Start difference. First operand 163 states and 198 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:16,209 INFO L93 Difference]: Finished difference Result 162 states and 196 transitions. [2022-11-20 12:36:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:36:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 12:36:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:16,211 INFO L225 Difference]: With dead ends: 162 [2022-11-20 12:36:16,211 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 12:36:16,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:36:16,212 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 83 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:16,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 288 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 12:36:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-20 12:36:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 121 states have (on average 1.5537190082644627) internal successors, (188), 155 states have internal predecessors, (188), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:36:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2022-11-20 12:36:16,217 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 31 [2022-11-20 12:36:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:16,217 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2022-11-20 12:36:16,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2022-11-20 12:36:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:36:16,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:16,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:16,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:36:16,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting sll_appendErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash 320066680, now seen corresponding path program 1 times [2022-11-20 12:36:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:16,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417404655] [2022-11-20 12:36:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 12:36:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417404655] [2022-11-20 12:36:16,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417404655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:16,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:16,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:36:16,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599860530] [2022-11-20 12:36:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:16,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:36:16,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:36:16,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:36:16,389 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:16,509 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2022-11-20 12:36:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:36:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 12:36:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:16,510 INFO L225 Difference]: With dead ends: 161 [2022-11-20 12:36:16,511 INFO L226 Difference]: Without dead ends: 161 [2022-11-20 12:36:16,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:36:16,511 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 108 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:16,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 326 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:36:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-20 12:36:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-20 12:36:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 121 states have (on average 1.537190082644628) internal successors, (186), 154 states have internal predecessors, (186), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:36:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2022-11-20 12:36:16,516 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 31 [2022-11-20 12:36:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:16,516 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2022-11-20 12:36:16,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2022-11-20 12:36:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 12:36:16,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:16,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:16,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:36:16,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting sll_appendErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1332132480, now seen corresponding path program 1 times [2022-11-20 12:36:16,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:16,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130399924] [2022-11-20 12:36:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:16,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:36:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130399924] [2022-11-20 12:36:16,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130399924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:36:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592082087] [2022-11-20 12:36:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:16,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:16,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:16,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:36:16,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:36:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:36:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:17,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:36:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:17,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:17,185 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:36:17,185 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:36:17,240 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 12:36:17,240 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:36:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:17,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:17,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:19,608 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 Int) (|v_sll_append_sll_create_~new_head~0#1.base_18| Int) (|v_sll_append_sll_create_~new_head~0#1.base_16| Int)) (or (= (select (store (store |c_#valid| |v_sll_append_sll_create_~new_head~0#1.base_18| 1) |v_sll_append_sll_create_~new_head~0#1.base_16| v_ArrVal_302) |c_sll_append_~head#1.base|) 1) (not (< |v_sll_append_sll_create_~new_head~0#1.base_16| |c_#StackHeapBarrier|)))) is different from false [2022-11-20 12:36:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2022-11-20 12:36:19,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592082087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:19,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:36:19,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2022-11-20 12:36:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854471226] [2022-11-20 12:36:19,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:19,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:36:19,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:36:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2022-11-20 12:36:19,839 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:20,103 INFO L93 Difference]: Finished difference Result 249 states and 304 transitions. [2022-11-20 12:36:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:36:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 12:36:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:20,105 INFO L225 Difference]: With dead ends: 249 [2022-11-20 12:36:20,105 INFO L226 Difference]: Without dead ends: 249 [2022-11-20 12:36:20,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=48, Invalid=111, Unknown=1, NotChecked=22, Total=182 [2022-11-20 12:36:20,106 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 115 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:20,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 599 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2022-11-20 12:36:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-20 12:36:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2022-11-20 12:36:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 196 states have (on average 1.469387755102041) internal successors, (288), 232 states have internal predecessors, (288), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:36:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2022-11-20 12:36:20,114 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 32 [2022-11-20 12:36:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:20,114 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2022-11-20 12:36:20,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2022-11-20 12:36:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 12:36:20,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:20,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:20,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:36:20,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:36:20,321 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting sll_appendErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1332132481, now seen corresponding path program 1 times [2022-11-20 12:36:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:20,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959645963] [2022-11-20 12:36:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:20,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:20,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:20,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959645963] [2022-11-20 12:36:20,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959645963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:36:20,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516591845] [2022-11-20 12:36:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:20,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:20,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:36:20,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:36:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:20,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 12:36:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:20,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:36:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:21,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:21,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:21,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:21,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:36:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:21,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:24,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516591845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:24,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:36:24,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-20 12:36:24,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942602175] [2022-11-20 12:36:24,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:36:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:36:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:36:24,142 INFO L87 Difference]: Start difference. First operand 241 states and 304 transitions. Second operand has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 11 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:24,382 INFO L93 Difference]: Finished difference Result 262 states and 321 transitions. [2022-11-20 12:36:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:36:24,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 11 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 12:36:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:24,384 INFO L225 Difference]: With dead ends: 262 [2022-11-20 12:36:24,384 INFO L226 Difference]: Without dead ends: 262 [2022-11-20 12:36:24,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:36:24,385 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 188 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:24,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 369 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-11-20 12:36:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-20 12:36:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 235. [2022-11-20 12:36:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 226 states have internal predecessors, (276), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:36:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2022-11-20 12:36:24,395 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 32 [2022-11-20 12:36:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:24,395 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2022-11-20 12:36:24,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 11 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2022-11-20 12:36:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 12:36:24,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:24,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:24,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:36:24,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:24,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting sll_appendErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:36:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:24,603 INFO L85 PathProgramCache]: Analyzing trace with hash 60922559, now seen corresponding path program 1 times [2022-11-20 12:36:24,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:36:24,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539389276] [2022-11-20 12:36:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:36:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:36:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:36:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539389276] [2022-11-20 12:36:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539389276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:36:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849324979] [2022-11-20 12:36:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:25,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:36:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:36:25,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:36:25,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:36:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:25,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 12:36:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:25,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:25,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 12:36:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,349 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:36:26,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-20 12:36:26,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:26,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:26,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:36:26,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:36:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:36:26,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:26,731 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_504 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_sll_append_~new_last~0#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_sll_append_~new_last~0#1.base| v_ArrVal_503) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0))) is different from false [2022-11-20 12:36:26,741 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_503 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_sll_append_node_create_with_sublist_#res#1.base| v_ArrVal_503) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|))) (forall ((v_ArrVal_504 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_sll_append_node_create_with_sublist_#res#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0))) is different from false [2022-11-20 12:36:26,889 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_sll_append_sll_create_~new_head~0#1.base| v_ArrVal_498) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_503) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|))) (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_sll_append_sll_create_~new_head~0#1.base| v_ArrVal_497) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0))) is different from false [2022-11-20 12:36:26,930 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_497) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)))) (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_498) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_503) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|))))) is different from false [2022-11-20 12:36:26,982 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_sll_append_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_sll_append_sll_create_~new_head~0#1.base|) |c_sll_append_sll_create_~new_head~0#1.offset| |c_sll_append_sll_create_~head~0#1.offset|)) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_498) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_503) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)))) (forall ((v_ArrVal_495 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.base| |c_sll_append_sll_create_~new_head~0#1.base| v_ArrVal_495) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_497) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|))))) is different from false [2022-11-20 12:36:28,958 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |v_sll_append_sll_create_~new_head~0#1.base_26| (store (select |c_#memory_$Pointer$.offset| |v_sll_append_sll_create_~new_head~0#1.base_26|) 0 |c_sll_append_sll_create_~new_head~0#1.offset|)) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_498) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_503) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|)))) (forall ((|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((v_ArrVal_495 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.base| |v_sll_append_sll_create_~new_head~0#1.base_26| v_ArrVal_495) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_497) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|))))) is different from false [2022-11-20 12:36:37,485 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_27| Int)) (or (forall ((v_ArrVal_492 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_495 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |v_sll_append_sll_create_~new_head~0#1.base_27| v_ArrVal_492) |v_sll_append_sll_create_~new_head~0#1.base_26| v_ArrVal_495) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_497) |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| v_ArrVal_504) |c_sll_append_#in~head#1.base|) |c_sll_append_#in~head#1.offset|) 0)))))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_27| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| |c_#StackHeapBarrier|)))) (forall ((|v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| Int)) (or (not (< |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| |c_#StackHeapBarrier|)) (forall ((|v_sll_append_sll_create_~new_head~0#1.base_27| Int)) (or (forall ((v_ArrVal_493 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= (select (select (store (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_sll_append_sll_create_~new_head~0#1.base_27| v_ArrVal_493))) (store .cse0 |v_sll_append_sll_create_~new_head~0#1.base_26| (store (select .cse0 |v_sll_append_sll_create_~new_head~0#1.base_26|) 0 0))) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_498) |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| v_ArrVal_503) |c_sll_append_#in~head#1.base|) |c_sll_append_#in~head#1.offset|) 0)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_27| |c_#StackHeapBarrier|))))))) is different from false [2022-11-20 12:36:37,621 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_27| Int)) (or (forall ((v_ArrVal_493 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= (select (select (store (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_sll_append_sll_create_~new_head~0#1.base_27| v_ArrVal_493))) (store .cse0 |v_sll_append_sll_create_~new_head~0#1.base_26| (store (select .cse0 |v_sll_append_sll_create_~new_head~0#1.base_26|) 0 0))) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_498) |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| v_ArrVal_503) |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 0)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_27| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| |c_#StackHeapBarrier|)))) (forall ((|v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_27| Int)) (or (forall ((v_ArrVal_492 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((v_ArrVal_495 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |v_sll_append_sll_create_~new_head~0#1.base_27| v_ArrVal_492) |v_sll_append_sll_create_~new_head~0#1.base_26| v_ArrVal_495) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_497) |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| v_ArrVal_504) |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 0)) (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_27| |c_#StackHeapBarrier|)))) (not (< |v_sll_append_node_create_with_sublist_~new_node~0#1.base_17| |c_#StackHeapBarrier|))))) is different from false [2022-11-20 12:36:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-11-20 12:36:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849324979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:38,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:36:38,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 38 [2022-11-20 12:36:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713080765] [2022-11-20 12:36:38,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:38,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:36:38,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:36:38,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:36:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=677, Unknown=48, NotChecked=504, Total=1406 [2022-11-20 12:36:38,105 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 35 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:00,086 WARN L233 SmtUtils]: Spent 20.85s on a formula simplification. DAG size of input: 79 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:37:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:01,320 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2022-11-20 12:37:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:37:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 35 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 12:37:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:01,322 INFO L225 Difference]: With dead ends: 231 [2022-11-20 12:37:01,323 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 12:37:01,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=315, Invalid=1308, Unknown=49, NotChecked=680, Total=2352 [2022-11-20 12:37:01,324 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 44 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 493 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:01,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1792 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 370 Invalid, 0 Unknown, 493 Unchecked, 0.7s Time] [2022-11-20 12:37:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 12:37:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2022-11-20 12:37:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 186 states have (on average 1.3440860215053763) internal successors, (250), 216 states have internal predecessors, (250), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:37:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2022-11-20 12:37:01,338 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 35 [2022-11-20 12:37:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:01,339 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2022-11-20 12:37:01,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 35 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2022-11-20 12:37:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:37:01,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:01,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:01,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 12:37:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:01,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2110401437, now seen corresponding path program 1 times [2022-11-20 12:37:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:01,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826532931] [2022-11-20 12:37:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:01,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:37:01,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:01,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826532931] [2022-11-20 12:37:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826532931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:01,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:01,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:37:01,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742468853] [2022-11-20 12:37:01,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:01,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:37:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:37:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:37:01,712 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:01,948 INFO L93 Difference]: Finished difference Result 281 states and 328 transitions. [2022-11-20 12:37:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:37:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-20 12:37:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:01,950 INFO L225 Difference]: With dead ends: 281 [2022-11-20 12:37:01,950 INFO L226 Difference]: Without dead ends: 281 [2022-11-20 12:37:01,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:37:01,951 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 194 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:01,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 287 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:37:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-20 12:37:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 225. [2022-11-20 12:37:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 186 states have (on average 1.3440860215053763) internal successors, (250), 216 states have internal predecessors, (250), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:37:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2022-11-20 12:37:01,960 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 46 [2022-11-20 12:37:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:01,961 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2022-11-20 12:37:01,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2022-11-20 12:37:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 12:37:01,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:01,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:01,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:37:01,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash 997933927, now seen corresponding path program 1 times [2022-11-20 12:37:01,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:01,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835796560] [2022-11-20 12:37:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:01,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:02,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 12:37:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835796560] [2022-11-20 12:37:02,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835796560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:02,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:02,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 12:37:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990033513] [2022-11-20 12:37:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:37:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:37:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:37:02,513 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:03,488 INFO L93 Difference]: Finished difference Result 395 states and 471 transitions. [2022-11-20 12:37:03,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:37:03,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-20 12:37:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:03,491 INFO L225 Difference]: With dead ends: 395 [2022-11-20 12:37:03,491 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 12:37:03,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:37:03,492 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 285 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:03,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 648 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:37:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 12:37:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 235. [2022-11-20 12:37:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 196 states have (on average 1.346938775510204) internal successors, (264), 225 states have internal predecessors, (264), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 281 transitions. [2022-11-20 12:37:03,501 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 281 transitions. Word has length 47 [2022-11-20 12:37:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:03,502 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 281 transitions. [2022-11-20 12:37:03,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 281 transitions. [2022-11-20 12:37:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 12:37:03,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:03,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:03,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:37:03,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash 997933928, now seen corresponding path program 1 times [2022-11-20 12:37:03,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:03,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138003395] [2022-11-20 12:37:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:03,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138003395] [2022-11-20 12:37:03,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138003395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751680033] [2022-11-20 12:37:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:03,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:03,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:37:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:03,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:37:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:04,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:04,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751680033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:04,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:04,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-20 12:37:04,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127886171] [2022-11-20 12:37:04,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:04,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:37:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:37:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:37:04,588 INFO L87 Difference]: Start difference. First operand 235 states and 281 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:37:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:04,948 INFO L93 Difference]: Finished difference Result 291 states and 338 transitions. [2022-11-20 12:37:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:37:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-11-20 12:37:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:04,958 INFO L225 Difference]: With dead ends: 291 [2022-11-20 12:37:04,959 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 12:37:04,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:37:04,960 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 231 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:04,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 811 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:37:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 12:37:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 259. [2022-11-20 12:37:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 220 states have (on average 1.3454545454545455) internal successors, (296), 249 states have internal predecessors, (296), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 313 transitions. [2022-11-20 12:37:04,969 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 313 transitions. Word has length 47 [2022-11-20 12:37:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:04,969 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 313 transitions. [2022-11-20 12:37:04,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:37:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 313 transitions. [2022-11-20 12:37:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 12:37:04,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:04,970 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:37:04,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:37:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:37:05,176 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 20261503, now seen corresponding path program 2 times [2022-11-20 12:37:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248570919] [2022-11-20 12:37:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248570919] [2022-11-20 12:37:05,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248570919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402704345] [2022-11-20 12:37:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:37:05,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:05,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:05,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:37:05,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:37:05,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 12:37:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:06,278 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:37:06,287 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:37:06,416 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-20 12:37:06,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:37:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:37:06,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:37:06,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402704345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:06,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:37:06,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 18 [2022-11-20 12:37:06,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135034606] [2022-11-20 12:37:06,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:06,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:37:06,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:06,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:37:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:37:06,567 INFO L87 Difference]: Start difference. First operand 259 states and 313 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:07,449 INFO L93 Difference]: Finished difference Result 409 states and 501 transitions. [2022-11-20 12:37:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:37:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-11-20 12:37:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:07,453 INFO L225 Difference]: With dead ends: 409 [2022-11-20 12:37:07,453 INFO L226 Difference]: Without dead ends: 409 [2022-11-20 12:37:07,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:37:07,454 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 461 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:07,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 597 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:37:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-20 12:37:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 277. [2022-11-20 12:37:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 238 states have (on average 1.361344537815126) internal successors, (324), 267 states have internal predecessors, (324), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2022-11-20 12:37:07,463 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 51 [2022-11-20 12:37:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:07,463 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2022-11-20 12:37:07,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2022-11-20 12:37:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 12:37:07,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:07,465 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:37:07,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 12:37:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:37:07,670 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 628100981, now seen corresponding path program 1 times [2022-11-20 12:37:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829248503] [2022-11-20 12:37:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:07,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:07,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:37:07,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829248503] [2022-11-20 12:37:07,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829248503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:07,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:07,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:37:07,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327101515] [2022-11-20 12:37:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:37:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:37:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:37:07,975 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:08,488 INFO L93 Difference]: Finished difference Result 315 states and 388 transitions. [2022-11-20 12:37:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:37:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-11-20 12:37:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:08,490 INFO L225 Difference]: With dead ends: 315 [2022-11-20 12:37:08,490 INFO L226 Difference]: Without dead ends: 315 [2022-11-20 12:37:08,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:37:08,491 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 50 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:08,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 603 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:37:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-20 12:37:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 301. [2022-11-20 12:37:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 262 states have (on average 1.381679389312977) internal successors, (362), 291 states have internal predecessors, (362), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 379 transitions. [2022-11-20 12:37:08,497 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 379 transitions. Word has length 52 [2022-11-20 12:37:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:08,497 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 379 transitions. [2022-11-20 12:37:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 379 transitions. [2022-11-20 12:37:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 12:37:08,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:08,500 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:37:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:37:08,501 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2003706554, now seen corresponding path program 1 times [2022-11-20 12:37:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215943632] [2022-11-20 12:37:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:08,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215943632] [2022-11-20 12:37:08,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215943632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738167410] [2022-11-20 12:37:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:08,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:08,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:08,854 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:08,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:37:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:37:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:09,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:09,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738167410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:09,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:37:09,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-20 12:37:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767590688] [2022-11-20 12:37:09,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:09,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:37:09,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:37:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:37:09,713 INFO L87 Difference]: Start difference. First operand 301 states and 379 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:10,117 INFO L93 Difference]: Finished difference Result 370 states and 442 transitions. [2022-11-20 12:37:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:37:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-11-20 12:37:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:10,122 INFO L225 Difference]: With dead ends: 370 [2022-11-20 12:37:10,123 INFO L226 Difference]: Without dead ends: 351 [2022-11-20 12:37:10,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:37:10,124 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 299 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:10,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 944 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:37:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-20 12:37:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 309. [2022-11-20 12:37:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 270 states have (on average 1.374074074074074) internal successors, (371), 299 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 388 transitions. [2022-11-20 12:37:10,131 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 388 transitions. Word has length 53 [2022-11-20 12:37:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:10,131 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 388 transitions. [2022-11-20 12:37:10,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 388 transitions. [2022-11-20 12:37:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 12:37:10,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:10,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:10,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:37:10,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-20 12:37:10,338 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash -541993187, now seen corresponding path program 2 times [2022-11-20 12:37:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:10,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221656346] [2022-11-20 12:37:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 12:37:10,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:10,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221656346] [2022-11-20 12:37:10,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221656346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:10,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:10,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 12:37:10,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208298805] [2022-11-20 12:37:10,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:10,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:37:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:37:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:37:10,877 INFO L87 Difference]: Start difference. First operand 309 states and 388 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:11,688 INFO L93 Difference]: Finished difference Result 410 states and 513 transitions. [2022-11-20 12:37:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:37:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-11-20 12:37:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:11,691 INFO L225 Difference]: With dead ends: 410 [2022-11-20 12:37:11,691 INFO L226 Difference]: Without dead ends: 410 [2022-11-20 12:37:11,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:37:11,692 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 184 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:11,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 771 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:37:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-20 12:37:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 309. [2022-11-20 12:37:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 270 states have (on average 1.362962962962963) internal successors, (368), 299 states have internal predecessors, (368), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 385 transitions. [2022-11-20 12:37:11,702 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 385 transitions. Word has length 57 [2022-11-20 12:37:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:11,702 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 385 transitions. [2022-11-20 12:37:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 385 transitions. [2022-11-20 12:37:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 12:37:11,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:11,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:11,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:37:11,704 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 383583177, now seen corresponding path program 1 times [2022-11-20 12:37:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:11,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301471002] [2022-11-20 12:37:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:12,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 12:37:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301471002] [2022-11-20 12:37:13,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301471002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:13,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:13,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-20 12:37:13,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520692329] [2022-11-20 12:37:13,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:13,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:37:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:37:13,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:37:13,974 INFO L87 Difference]: Start difference. First operand 309 states and 385 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:17,134 INFO L93 Difference]: Finished difference Result 517 states and 637 transitions. [2022-11-20 12:37:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:37:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-11-20 12:37:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:17,146 INFO L225 Difference]: With dead ends: 517 [2022-11-20 12:37:17,146 INFO L226 Difference]: Without dead ends: 517 [2022-11-20 12:37:17,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:37:17,148 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 625 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:17,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 993 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 12:37:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-20 12:37:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 330. [2022-11-20 12:37:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 291 states have (on average 1.3676975945017182) internal successors, (398), 319 states have internal predecessors, (398), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 415 transitions. [2022-11-20 12:37:17,160 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 415 transitions. Word has length 58 [2022-11-20 12:37:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:17,161 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 415 transitions. [2022-11-20 12:37:17,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 415 transitions. [2022-11-20 12:37:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 12:37:17,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:17,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:17,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 12:37:17,162 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:17,163 INFO L85 PathProgramCache]: Analyzing trace with hash 383583178, now seen corresponding path program 1 times [2022-11-20 12:37:17,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:17,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699731933] [2022-11-20 12:37:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:18,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 12:37:20,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:20,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699731933] [2022-11-20 12:37:20,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699731933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:20,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:20,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-20 12:37:20,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741991445] [2022-11-20 12:37:20,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:20,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:37:20,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:37:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:37:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:37:20,016 INFO L87 Difference]: Start difference. First operand 330 states and 415 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:23,909 INFO L93 Difference]: Finished difference Result 573 states and 696 transitions. [2022-11-20 12:37:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:37:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-11-20 12:37:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:23,912 INFO L225 Difference]: With dead ends: 573 [2022-11-20 12:37:23,912 INFO L226 Difference]: Without dead ends: 573 [2022-11-20 12:37:23,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:37:23,913 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 673 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:23,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 981 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 12:37:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-20 12:37:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 330. [2022-11-20 12:37:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 291 states have (on average 1.3642611683848798) internal successors, (397), 319 states have internal predecessors, (397), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 12:37:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 414 transitions. [2022-11-20 12:37:23,930 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 414 transitions. Word has length 58 [2022-11-20 12:37:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:23,931 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 414 transitions. [2022-11-20 12:37:23,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:37:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 414 transitions. [2022-11-20 12:37:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 12:37:23,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:23,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 12:37:23,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:37:23,936 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [sll_appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, sll_appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 12:37:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1581411742, now seen corresponding path program 1 times [2022-11-20 12:37:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:37:23,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131447532] [2022-11-20 12:37:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:37:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:26,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 12:37:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:37:30,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:37:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131447532] [2022-11-20 12:37:30,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131447532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:37:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149706900] [2022-11-20 12:37:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:30,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:37:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:37:30,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:37:30,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c936ec-9fdb-40da-886c-80ab0b07d406/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:37:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-20 12:37:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:30,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:37:31,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:37:31,388 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:37:31,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:37:31,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:37:31,608 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:37:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:32,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 12:37:32,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:32,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 12:37:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:32,686 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-20 12:37:32,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 46 [2022-11-20 12:37:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:32,726 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 12:37:32,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 55 [2022-11-20 12:37:33,627 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-20 12:37:33,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 48 [2022-11-20 12:37:33,660 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 12:37:33,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2022-11-20 12:37:35,293 INFO L321 Elim1Store]: treesize reduction 68, result has 50.7 percent of original size [2022-11-20 12:37:35,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 125 [2022-11-20 12:37:35,389 INFO L321 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2022-11-20 12:37:35,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2022-11-20 12:37:36,620 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 12:37:36,621 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2022-11-20 12:37:39,622 INFO L321 Elim1Store]: treesize reduction 308, result has 32.6 percent of original size [2022-11-20 12:37:39,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 283 treesize of output 288 [2022-11-20 12:37:40,208 INFO L321 Elim1Store]: treesize reduction 232, result has 35.7 percent of original size [2022-11-20 12:37:40,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 43 case distinctions, treesize of input 187 treesize of output 257 [2022-11-20 12:39:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:39:00,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:39:03,036 INFO L321 Elim1Store]: treesize reduction 154, result has 5.5 percent of original size [2022-11-20 12:39:03,037 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 103457 treesize of output 98977 [2022-11-20 12:39:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:39:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:39:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:39:04,786 INFO L321 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-11-20 12:39:04,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53145 treesize of output 52651