./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/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_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a --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-b5237d8 [2022-11-21 16:07:28,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:07:28,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:07:28,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:07:28,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:07:28,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:07:28,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:07:28,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:07:28,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:07:28,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:07:28,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:07:28,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:07:28,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:07:28,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:07:28,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:07:28,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:07:28,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:07:28,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:07:28,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:07:28,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:07:28,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:07:28,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:07:28,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:07:28,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:07:28,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:07:28,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:07:28,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:07:28,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:07:28,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:07:28,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:07:28,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:07:28,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:07:28,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:07:28,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:07:28,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:07:28,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:07:28,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:07:28,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:07:28,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:07:28,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:07:28,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:07:28,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-21 16:07:28,212 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:07:28,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:07:28,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:07:28,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:07:28,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:07:28,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:07:28,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:07:28,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:07:28,215 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:07:28,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:07:28,216 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:07:28,216 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:07:28,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:07:28,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:07:28,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:07:28,217 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:07:28,217 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:07:28,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:07:28,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:07:28,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:07:28,218 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:07:28,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:07:28,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:07:28,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:07:28,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:07:28,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:07:28,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:07:28,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:07:28,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:07:28,219 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_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2022-11-21 16:07:28,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:07:28,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:07:28,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:07:28,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:07:28,521 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:07:28,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-21 16:07:31,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:07:31,955 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:07:31,956 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-21 16:07:31,976 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/data/b7f0d9b54/3b3f0ee9d55c48b48a9854f0380e8eab/FLAG565aace5c [2022-11-21 16:07:32,001 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/data/b7f0d9b54/3b3f0ee9d55c48b48a9854f0380e8eab [2022-11-21 16:07:32,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:07:32,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:07:32,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:07:32,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:07:32,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:07:32,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d20c4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32, skipping insertion in model container [2022-11-21 16:07:32,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:07:32,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:07:32,434 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_30296c58-5887-4b05-aee2-dae654aa3db9/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-21 16:07:32,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:07:32,450 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:07:32,516 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_30296c58-5887-4b05-aee2-dae654aa3db9/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-21 16:07:32,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:07:32,551 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:07:32,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32 WrapperNode [2022-11-21 16:07:32,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:07:32,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:07:32,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:07:32,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:07:32,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,603 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-21 16:07:32,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:07:32,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:07:32,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:07:32,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:07:32,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:07:32,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:07:32,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:07:32,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:07:32,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (1/1) ... [2022-11-21 16:07:32,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:07:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:32,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:07:32,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:07:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-21 16:07:32,773 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-21 16:07:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:07:32,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:07:32,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:07:32,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:07:32,774 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2022-11-21 16:07:32,774 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2022-11-21 16:07:32,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:07:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:07:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 16:07:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:07:32,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:07:32,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:07:32,923 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:07:32,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:07:32,994 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-21 16:07:33,505 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:07:33,514 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:07:33,514 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-21 16:07:33,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:07:33 BoogieIcfgContainer [2022-11-21 16:07:33,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:07:33,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:07:33,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:07:33,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:07:33,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:07:32" (1/3) ... [2022-11-21 16:07:33,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b824cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:07:33, skipping insertion in model container [2022-11-21 16:07:33,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:07:32" (2/3) ... [2022-11-21 16:07:33,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b824cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:07:33, skipping insertion in model container [2022-11-21 16:07:33,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:07:33" (3/3) ... [2022-11-21 16:07:33,527 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2022-11-21 16:07:33,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:07:33,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-21 16:07:33,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:07:33,605 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;@288027ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:07:33,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-21 16:07:33,610 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) [2022-11-21 16:07:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:07:33,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:33,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:33,620 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)] === [2022-11-21 16:07:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -46006015, now seen corresponding path program 1 times [2022-11-21 16:07:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:33,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982228043] [2022-11-21 16:07:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:33,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:33,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982228043] [2022-11-21 16:07:33,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982228043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:33,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:33,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:07:33,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633765650] [2022-11-21 16:07:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:07:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:07:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:07:34,028 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) [2022-11-21 16:07:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:34,101 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2022-11-21 16:07:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:07:34,107 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 [2022-11-21 16:07:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:34,114 INFO L225 Difference]: With dead ends: 128 [2022-11-21 16:07:34,114 INFO L226 Difference]: Without dead ends: 122 [2022-11-21 16:07:34,115 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 [2022-11-21 16:07:34,119 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 [2022-11-21 16:07:34,119 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] [2022-11-21 16:07:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-21 16:07:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2022-11-21 16:07:34,158 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) [2022-11-21 16:07:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-11-21 16:07:34,163 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 10 [2022-11-21 16:07:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:34,164 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-11-21 16:07:34,164 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) [2022-11-21 16:07:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-11-21 16:07:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:07:34,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:34,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:07:34,166 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)] === [2022-11-21 16:07:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash 244152622, now seen corresponding path program 1 times [2022-11-21 16:07:34,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:34,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822667021] [2022-11-21 16:07:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:34,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:34,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822667021] [2022-11-21 16:07:34,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822667021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:34,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:34,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:07:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991150269] [2022-11-21 16:07:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:07:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:07:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:07:34,469 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) [2022-11-21 16:07:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:34,629 INFO L93 Difference]: Finished difference Result 151 states and 169 transitions. [2022-11-21 16:07:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:07:34,630 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 [2022-11-21 16:07:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:34,633 INFO L225 Difference]: With dead ends: 151 [2022-11-21 16:07:34,633 INFO L226 Difference]: Without dead ends: 151 [2022-11-21 16:07:34,634 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 [2022-11-21 16:07:34,635 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 [2022-11-21 16:07:34,636 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] [2022-11-21 16:07:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-21 16:07:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2022-11-21 16:07:34,644 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) [2022-11-21 16:07:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2022-11-21 16:07:34,647 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 13 [2022-11-21 16:07:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:34,648 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2022-11-21 16:07:34,648 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) [2022-11-21 16:07:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2022-11-21 16:07:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:07:34,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:34,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:34,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:07:34,650 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)] === [2022-11-21 16:07:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:34,651 INFO L85 PathProgramCache]: Analyzing trace with hash 244152621, now seen corresponding path program 1 times [2022-11-21 16:07:34,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:34,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842157933] [2022-11-21 16:07:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:34,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:34,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842157933] [2022-11-21 16:07:34,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842157933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:34,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:34,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:07:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132383885] [2022-11-21 16:07:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:07:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:07:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:07:34,744 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) [2022-11-21 16:07:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:34,847 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-11-21 16:07:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:07:34,848 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 [2022-11-21 16:07:34,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:34,849 INFO L225 Difference]: With dead ends: 150 [2022-11-21 16:07:34,850 INFO L226 Difference]: Without dead ends: 150 [2022-11-21 16:07:34,850 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 [2022-11-21 16:07:34,851 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 [2022-11-21 16:07:34,852 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] [2022-11-21 16:07:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-21 16:07:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2022-11-21 16:07:34,877 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) [2022-11-21 16:07:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-11-21 16:07:34,880 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 13 [2022-11-21 16:07:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:34,881 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-11-21 16:07:34,881 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) [2022-11-21 16:07:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-11-21 16:07:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:07:34,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:34,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:34,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:07:34,883 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)] === [2022-11-21 16:07:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1021253985, now seen corresponding path program 1 times [2022-11-21 16:07:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869641165] [2022-11-21 16:07:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869641165] [2022-11-21 16:07:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869641165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:07:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406955422] [2022-11-21 16:07:34,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:34,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:07:34,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:07:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:07:34,963 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) [2022-11-21 16:07:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:35,063 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2022-11-21 16:07:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:07:35,064 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 [2022-11-21 16:07:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:35,067 INFO L225 Difference]: With dead ends: 112 [2022-11-21 16:07:35,067 INFO L226 Difference]: Without dead ends: 112 [2022-11-21 16:07:35,067 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 [2022-11-21 16:07:35,069 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 [2022-11-21 16:07:35,072 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] [2022-11-21 16:07:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-21 16:07:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-21 16:07:35,084 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) [2022-11-21 16:07:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2022-11-21 16:07:35,090 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 14 [2022-11-21 16:07:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:35,090 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2022-11-21 16:07:35,091 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) [2022-11-21 16:07:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2022-11-21 16:07:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:07:35,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:35,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:35,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:07:35,093 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)] === [2022-11-21 16:07:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1021253984, now seen corresponding path program 1 times [2022-11-21 16:07:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:35,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181097640] [2022-11-21 16:07:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:35,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181097640] [2022-11-21 16:07:35,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181097640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:35,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:35,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:07:35,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825341007] [2022-11-21 16:07:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:07:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:07:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:07:35,212 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) [2022-11-21 16:07:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:35,349 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2022-11-21 16:07:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:07:35,350 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 [2022-11-21 16:07:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:35,352 INFO L225 Difference]: With dead ends: 213 [2022-11-21 16:07:35,352 INFO L226 Difference]: Without dead ends: 213 [2022-11-21 16:07:35,353 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 [2022-11-21 16:07:35,354 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 [2022-11-21 16:07:35,355 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] [2022-11-21 16:07:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-21 16:07:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 139. [2022-11-21 16:07:35,363 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) [2022-11-21 16:07:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2022-11-21 16:07:35,365 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 14 [2022-11-21 16:07:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:35,365 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2022-11-21 16:07:35,366 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) [2022-11-21 16:07:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2022-11-21 16:07:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:07:35,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:35,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:35,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:07:35,367 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)] === [2022-11-21 16:07:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -790832604, now seen corresponding path program 1 times [2022-11-21 16:07:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:35,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250746469] [2022-11-21 16:07:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250746469] [2022-11-21 16:07:35,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250746469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:07:35,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090646931] [2022-11-21 16:07:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:35,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:35,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:35,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:07:35,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:07:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:07:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:07:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:35,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:07:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:35,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090646931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:07:35,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:07:35,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-21 16:07:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271567666] [2022-11-21 16:07:35,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:07:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:07:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:07:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:07:35,737 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) [2022-11-21 16:07:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:35,806 INFO L93 Difference]: Finished difference Result 192 states and 229 transitions. [2022-11-21 16:07:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:07:35,807 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 [2022-11-21 16:07:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:35,808 INFO L225 Difference]: With dead ends: 192 [2022-11-21 16:07:35,808 INFO L226 Difference]: Without dead ends: 192 [2022-11-21 16:07:35,810 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 [2022-11-21 16:07:35,816 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 [2022-11-21 16:07:35,818 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] [2022-11-21 16:07:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-21 16:07:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2022-11-21 16:07:35,830 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) [2022-11-21 16:07:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2022-11-21 16:07:35,831 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 16 [2022-11-21 16:07:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:35,832 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2022-11-21 16:07:35,832 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) [2022-11-21 16:07:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2022-11-21 16:07:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:07:35,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:35,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:35,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:07:36,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:07:36,040 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)] === [2022-11-21 16:07:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:36,041 INFO L85 PathProgramCache]: Analyzing trace with hash -924446423, now seen corresponding path program 1 times [2022-11-21 16:07:36,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:36,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680887459] [2022-11-21 16:07:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:36,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:36,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:36,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680887459] [2022-11-21 16:07:36,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680887459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:07:36,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608816068] [2022-11-21 16:07:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:36,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:36,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:36,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:07:36,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:07:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:36,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:07:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:07:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:36,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:07:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:36,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608816068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:07:36,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:07:36,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-21 16:07:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240391453] [2022-11-21 16:07:36,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:07:36,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:07:36,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:07:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:07:36,534 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) [2022-11-21 16:07:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:36,721 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2022-11-21 16:07:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:07:36,722 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 [2022-11-21 16:07:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:36,724 INFO L225 Difference]: With dead ends: 238 [2022-11-21 16:07:36,724 INFO L226 Difference]: Without dead ends: 238 [2022-11-21 16:07:36,725 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 [2022-11-21 16:07:36,726 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 [2022-11-21 16:07:36,727 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] [2022-11-21 16:07:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-21 16:07:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 164. [2022-11-21 16:07:36,747 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) [2022-11-21 16:07:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 201 transitions. [2022-11-21 16:07:36,752 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 201 transitions. Word has length 18 [2022-11-21 16:07:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:36,753 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 201 transitions. [2022-11-21 16:07:36,753 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) [2022-11-21 16:07:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 201 transitions. [2022-11-21 16:07:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:07:36,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:36,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:36,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:07:36,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:36,962 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)] === [2022-11-21 16:07:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash 760370116, now seen corresponding path program 2 times [2022-11-21 16:07:36,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:36,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550118838] [2022-11-21 16:07:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:07:37,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550118838] [2022-11-21 16:07:37,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550118838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:37,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:37,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:07:37,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391537591] [2022-11-21 16:07:37,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:37,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:07:37,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:07:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:07:37,062 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) [2022-11-21 16:07:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:37,114 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2022-11-21 16:07:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:07:37,115 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 [2022-11-21 16:07:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:37,116 INFO L225 Difference]: With dead ends: 182 [2022-11-21 16:07:37,116 INFO L226 Difference]: Without dead ends: 182 [2022-11-21 16:07:37,116 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 [2022-11-21 16:07:37,117 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 [2022-11-21 16:07:37,117 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] [2022-11-21 16:07:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-21 16:07:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-11-21 16:07:37,122 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) [2022-11-21 16:07:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2022-11-21 16:07:37,123 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 26 [2022-11-21 16:07:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:37,124 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2022-11-21 16:07:37,124 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) [2022-11-21 16:07:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2022-11-21 16:07:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:07:37,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:37,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:07:37,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:07:37,126 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)] === [2022-11-21 16:07:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1087676229, now seen corresponding path program 2 times [2022-11-21 16:07:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966747643] [2022-11-21 16:07:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:07:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966747643] [2022-11-21 16:07:37,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966747643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:07:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571282890] [2022-11-21 16:07:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:07:37,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:37,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:37,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:07:37,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:07:37,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:07:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:07:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:07:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:07:37,872 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 [2022-11-21 16:07:37,886 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 [2022-11-21 16:07:37,935 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 16:07:37,935 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 [2022-11-21 16:07:37,947 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 [2022-11-21 16:07:38,005 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 16:07:38,006 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 [2022-11-21 16:07:38,012 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 [2022-11-21 16:07:38,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:38,059 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 [2022-11-21 16:07:38,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 16:07:38,073 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 [2022-11-21 16:07:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:38,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:07:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:42,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571282890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:07:42,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:07:42,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 7 [2022-11-21 16:07:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119794170] [2022-11-21 16:07:42,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:07:42,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:07:42,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:07:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:07:42,699 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) [2022-11-21 16:07:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:42,902 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2022-11-21 16:07:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:07:42,903 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 [2022-11-21 16:07:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:42,904 INFO L225 Difference]: With dead ends: 163 [2022-11-21 16:07:42,904 INFO L226 Difference]: Without dead ends: 163 [2022-11-21 16:07:42,904 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 [2022-11-21 16:07:42,905 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 136 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 127 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, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:07:42,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 335 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:07:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-21 16:07:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-21 16:07:42,909 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) [2022-11-21 16:07:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2022-11-21 16:07:42,910 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 26 [2022-11-21 16:07:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:42,913 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2022-11-21 16:07:42,913 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) [2022-11-21 16:07:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2022-11-21 16:07:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:07:42,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:42,918 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] [2022-11-21 16:07:42,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:07:43,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:43,119 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)] === [2022-11-21 16:07:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash 320066679, now seen corresponding path program 1 times [2022-11-21 16:07:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191429861] [2022-11-21 16:07:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:43,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:07:43,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191429861] [2022-11-21 16:07:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191429861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:43,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:43,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:07:43,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91759431] [2022-11-21 16:07:43,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:43,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:07:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:07:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:07:43,276 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) [2022-11-21 16:07:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:43,418 INFO L93 Difference]: Finished difference Result 162 states and 196 transitions. [2022-11-21 16:07:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:07:43,421 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 [2022-11-21 16:07:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:43,422 INFO L225 Difference]: With dead ends: 162 [2022-11-21 16:07:43,422 INFO L226 Difference]: Without dead ends: 162 [2022-11-21 16:07:43,422 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 [2022-11-21 16:07:43,423 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 [2022-11-21 16:07:43,423 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] [2022-11-21 16:07:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-21 16:07:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-21 16:07:43,427 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) [2022-11-21 16:07:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2022-11-21 16:07:43,429 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 31 [2022-11-21 16:07:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:43,429 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2022-11-21 16:07:43,429 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) [2022-11-21 16:07:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2022-11-21 16:07:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:07:43,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:43,433 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] [2022-11-21 16:07:43,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:07:43,434 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)] === [2022-11-21 16:07:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 320066680, now seen corresponding path program 1 times [2022-11-21 16:07:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623779883] [2022-11-21 16:07:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:07:43,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:43,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623779883] [2022-11-21 16:07:43,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623779883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:07:43,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:07:43,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:07:43,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813971401] [2022-11-21 16:07:43,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:07:43,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:07:43,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:43,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:07:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:07:43,677 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) [2022-11-21 16:07:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:43,806 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2022-11-21 16:07:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:07:43,807 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 [2022-11-21 16:07:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:43,808 INFO L225 Difference]: With dead ends: 161 [2022-11-21 16:07:43,808 INFO L226 Difference]: Without dead ends: 161 [2022-11-21 16:07:43,808 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 [2022-11-21 16:07:43,809 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 [2022-11-21 16:07:43,809 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] [2022-11-21 16:07:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-21 16:07:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-21 16:07:43,813 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) [2022-11-21 16:07:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2022-11-21 16:07:43,814 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 31 [2022-11-21 16:07:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:43,814 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2022-11-21 16:07:43,814 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) [2022-11-21 16:07:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2022-11-21 16:07:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:07:43,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:43,815 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] [2022-11-21 16:07:43,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:07:43,815 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)] === [2022-11-21 16:07:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1332132480, now seen corresponding path program 1 times [2022-11-21 16:07:43,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:43,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791095070] [2022-11-21 16:07:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:07:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:44,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791095070] [2022-11-21 16:07:44,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791095070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:07:44,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197394924] [2022-11-21 16:07:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:44,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:07:44,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:07:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:44,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:07:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:07:44,384 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 [2022-11-21 16:07:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:44,434 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 [2022-11-21 16:07:44,471 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:07:44,471 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 [2022-11-21 16:07:44,517 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 16:07:44,518 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 [2022-11-21 16:07:44,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:44,559 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 [2022-11-21 16:07:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:44,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:07:46,683 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 Int) (|v_sll_append_sll_create_~new_head~0#1.base_17| 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_17| 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 [2022-11-21 16:07:48,729 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_17| Int) (|v_sll_append_sll_create_~new_head~0#1.base_16| Int)) (or (= (select (store (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_17| 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 [2022-11-21 16:07:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-11-21 16:07:51,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197394924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:07:51,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:07:51,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 13 [2022-11-21 16:07:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310093284] [2022-11-21 16:07:51,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:07:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:07:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:07:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=97, Unknown=3, NotChecked=42, Total=182 [2022-11-21 16:07:51,020 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 14 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 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) [2022-11-21 16:07:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:53,357 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2022-11-21 16:07:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:07:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 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 [2022-11-21 16:07:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:53,359 INFO L225 Difference]: With dead ends: 184 [2022-11-21 16:07:53,359 INFO L226 Difference]: Without dead ends: 184 [2022-11-21 16:07:53,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=111, Unknown=3, NotChecked=46, Total=210 [2022-11-21 16:07:53,360 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 190 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:07:53,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 366 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 257 Unchecked, 0.3s Time] [2022-11-21 16:07:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-21 16:07:53,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 157. [2022-11-21 16:07:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 121 states have (on average 1.487603305785124) internal successors, (180), 150 states have internal predecessors, (180), 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) [2022-11-21 16:07:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2022-11-21 16:07:53,365 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 32 [2022-11-21 16:07:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:53,365 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2022-11-21 16:07:53,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 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) [2022-11-21 16:07:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2022-11-21 16:07:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:07:53,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:53,366 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] [2022-11-21 16:07:53,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:07:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:53,567 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)] === [2022-11-21 16:07:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1332132481, now seen corresponding path program 1 times [2022-11-21 16:07:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:53,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898435568] [2022-11-21 16:07:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898435568] [2022-11-21 16:07:54,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898435568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:07:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226530987] [2022-11-21 16:07:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:54,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:07:54,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:07:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:07:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:07:54,316 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 [2022-11-21 16:07:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:54,409 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 [2022-11-21 16:07:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:54,462 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 [2022-11-21 16:07:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:54,509 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 [2022-11-21 16:07:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:54,546 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 [2022-11-21 16:07:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:07:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:55,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226530987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:07:55,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:07:55,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-21 16:07:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145373505] [2022-11-21 16:07:55,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:07:55,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:07:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:07:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:07:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:07:55,608 INFO L87 Difference]: Start difference. First operand 157 states and 188 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) [2022-11-21 16:07:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:07:55,908 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2022-11-21 16:07:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:07:55,909 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 [2022-11-21 16:07:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:07:55,909 INFO L225 Difference]: With dead ends: 180 [2022-11-21 16:07:55,910 INFO L226 Difference]: Without dead ends: 180 [2022-11-21 16:07:55,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:07:55,910 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 408 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:07:55,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 269 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:07:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-21 16:07:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 153. [2022-11-21 16:07:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 121 states have (on average 1.43801652892562) internal successors, (174), 146 states have internal predecessors, (174), 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) [2022-11-21 16:07:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2022-11-21 16:07:55,916 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 32 [2022-11-21 16:07:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:07:55,916 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2022-11-21 16:07:55,916 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) [2022-11-21 16:07:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2022-11-21 16:07:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:07:55,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:07:55,917 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] [2022-11-21 16:07:55,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:07:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:56,118 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)] === [2022-11-21 16:07:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:07:56,119 INFO L85 PathProgramCache]: Analyzing trace with hash 60922559, now seen corresponding path program 1 times [2022-11-21 16:07:56,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:07:56,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695752284] [2022-11-21 16:07:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:07:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:07:57,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:07:57,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695752284] [2022-11-21 16:07:57,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695752284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:07:57,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147107997] [2022-11-21 16:07:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:07:57,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:07:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:07:57,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:07:57,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:07:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:07:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-21 16:07:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:07:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,464 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 [2022-11-21 16:07:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,474 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 [2022-11-21 16:07:57,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,690 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 [2022-11-21 16:07:57,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,700 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 [2022-11-21 16:07:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,920 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:07:57,921 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 [2022-11-21 16:07:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:57,934 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 [2022-11-21 16:07:58,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:58,044 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 [2022-11-21 16:07:58,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:58,054 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 [2022-11-21 16:07:58,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:58,084 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 [2022-11-21 16:07:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:58,101 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 [2022-11-21 16:07:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:58,225 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 [2022-11-21 16:07:58,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:07:58,234 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 [2022-11-21 16:07:58,288 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 [2022-11-21 16:07:58,293 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 [2022-11-21 16:07:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:07:58,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:07:58,326 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 [2022-11-21 16:07:58,337 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 [2022-11-21 16:07:58,476 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 [2022-11-21 16:07:58,515 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 [2022-11-21 16:07:58,564 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 [2022-11-21 16:08:01,942 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 [2022-11-21 16:08:03,998 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_492 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((v_ArrVal_495 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_504 (Array Int Int)) (v_ArrVal_497 (Array Int Int))) (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |c_sll_append_sll_create_~new_head~0#1.base| v_ArrVal_492) |v_sll_append_sll_create_~new_head~0#1.base_26| v_ArrVal_495) |v_sll_append_sll_create_~new_head~0#1.base_25| v_ArrVal_497) |c_sll_append_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_504) |c_sll_append_~head#1.base|) |c_sll_append_~head#1.offset|) 0)))) (not (< |v_sll_append_sll_create_~new_head~0#1.base_26| |c_#StackHeapBarrier|)))) (forall ((v_ArrVal_493 (Array Int Int)) (|v_sll_append_sll_create_~new_head~0#1.base_26| Int)) (or (forall ((|v_sll_append_sll_create_~new_head~0#1.base_25| Int)) (or (not (< |v_sll_append_sll_create_~new_head~0#1.base_25| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_503 (Array Int Int)) (v_ArrVal_498 (Array Int Int))) (= (select (select (store (store (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_sll_append_sll_create_~new_head~0#1.base| 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 |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_26| |c_#StackHeapBarrier|))))) is different from false [2022-11-21 16:08:06,927 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 [2022-11-21 16:08:07,080 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 [2022-11-21 16:08:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-11-21 16:08:07,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147107997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:07,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:07,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 38 [2022-11-21 16:08:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432461743] [2022-11-21 16:08:07,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:07,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-21 16:08:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-21 16:08:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=642, Unknown=32, NotChecked=558, Total=1406 [2022-11-21 16:08:07,498 INFO L87 Difference]: Start difference. First operand 153 states and 182 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) [2022-11-21 16:08:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:11,083 INFO L93 Difference]: Finished difference Result 226 states and 270 transitions. [2022-11-21 16:08:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:08:11,084 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 [2022-11-21 16:08:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:11,085 INFO L225 Difference]: With dead ends: 226 [2022-11-21 16:08:11,085 INFO L226 Difference]: Without dead ends: 226 [2022-11-21 16:08:11,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=362, Invalid=1281, Unknown=33, NotChecked=774, Total=2450 [2022-11-21 16:08:11,087 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 105 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 36 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:11,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1628 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 403 Invalid, 13 Unknown, 487 Unchecked, 1.0s Time] [2022-11-21 16:08:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-21 16:08:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2022-11-21 16:08:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 184 states have (on average 1.3369565217391304) internal successors, (246), 213 states have internal predecessors, (246), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 266 transitions. [2022-11-21 16:08:11,096 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 266 transitions. Word has length 35 [2022-11-21 16:08:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:11,097 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 266 transitions. [2022-11-21 16:08:11,097 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) [2022-11-21 16:08:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 266 transitions. [2022-11-21 16:08:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:08:11,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:11,098 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] [2022-11-21 16:08:11,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:08:11,305 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)] === [2022-11-21 16:08:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2110401437, now seen corresponding path program 1 times [2022-11-21 16:08:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:11,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066384733] [2022-11-21 16:08:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-21 16:08:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:11,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066384733] [2022-11-21 16:08:11,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066384733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:11,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:11,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:08:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043402188] [2022-11-21 16:08:11,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:11,433 INFO L87 Difference]: Start difference. First operand 222 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) [2022-11-21 16:08:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:11,592 INFO L93 Difference]: Finished difference Result 278 states and 328 transitions. [2022-11-21 16:08:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:11,593 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 [2022-11-21 16:08:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:11,595 INFO L225 Difference]: With dead ends: 278 [2022-11-21 16:08:11,595 INFO L226 Difference]: Without dead ends: 278 [2022-11-21 16:08:11,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:08:11,596 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 194 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:11,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 284 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-21 16:08:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 222. [2022-11-21 16:08:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 184 states have (on average 1.3369565217391304) internal successors, (246), 213 states have internal predecessors, (246), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 266 transitions. [2022-11-21 16:08:11,604 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 266 transitions. Word has length 46 [2022-11-21 16:08:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:11,605 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 266 transitions. [2022-11-21 16:08:11,605 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) [2022-11-21 16:08:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 266 transitions. [2022-11-21 16:08:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:08:11,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:11,606 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] [2022-11-21 16:08:11,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:08:11,607 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)] === [2022-11-21 16:08:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash 997933927, now seen corresponding path program 1 times [2022-11-21 16:08:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:11,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902370852] [2022-11-21 16:08:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:11,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:11,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-21 16:08:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902370852] [2022-11-21 16:08:12,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902370852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:12,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:12,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:08:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669519992] [2022-11-21 16:08:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:12,062 INFO L87 Difference]: Start difference. First operand 222 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) [2022-11-21 16:08:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:12,644 INFO L93 Difference]: Finished difference Result 388 states and 465 transitions. [2022-11-21 16:08:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:12,645 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 [2022-11-21 16:08:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:12,647 INFO L225 Difference]: With dead ends: 388 [2022-11-21 16:08:12,647 INFO L226 Difference]: Without dead ends: 388 [2022-11-21 16:08:12,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:08:12,648 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 282 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:12,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 648 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:08:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-21 16:08:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 230. [2022-11-21 16:08:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 193 states have (on average 1.3419689119170986) internal successors, (259), 220 states have internal predecessors, (259), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 279 transitions. [2022-11-21 16:08:12,656 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 279 transitions. Word has length 47 [2022-11-21 16:08:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:12,657 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 279 transitions. [2022-11-21 16:08:12,657 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) [2022-11-21 16:08:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 279 transitions. [2022-11-21 16:08:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-21 16:08:12,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:12,658 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] [2022-11-21 16:08:12,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:08:12,658 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)] === [2022-11-21 16:08:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash 997933928, now seen corresponding path program 1 times [2022-11-21 16:08:12,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942156584] [2022-11-21 16:08:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942156584] [2022-11-21 16:08:12,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942156584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:12,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124936103] [2022-11-21 16:08:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:12,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:12,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:12,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:08:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:08:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:13,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:13,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124936103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:13,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:13,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-21 16:08:13,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643752265] [2022-11-21 16:08:13,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:13,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:08:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:08:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:08:13,419 INFO L87 Difference]: Start difference. First operand 230 states and 279 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) [2022-11-21 16:08:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:13,664 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2022-11-21 16:08:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:08:13,665 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 [2022-11-21 16:08:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:13,666 INFO L225 Difference]: With dead ends: 282 [2022-11-21 16:08:13,670 INFO L226 Difference]: Without dead ends: 266 [2022-11-21 16:08:13,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:08:13,671 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 220 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:13,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 826 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:08:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-21 16:08:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 254. [2022-11-21 16:08:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 217 states have (on average 1.336405529953917) internal successors, (290), 244 states have internal predecessors, (290), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:13,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 310 transitions. [2022-11-21 16:08:13,681 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 310 transitions. Word has length 47 [2022-11-21 16:08:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:13,681 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 310 transitions. [2022-11-21 16:08:13,681 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) [2022-11-21 16:08:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 310 transitions. [2022-11-21 16:08:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-21 16:08:13,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:13,683 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] [2022-11-21 16:08:13,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 16:08:13,891 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)] === [2022-11-21 16:08:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash 20261503, now seen corresponding path program 2 times [2022-11-21 16:08:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344684931] [2022-11-21 16:08:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:14,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:14,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344684931] [2022-11-21 16:08:14,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344684931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:14,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499341357] [2022-11-21 16:08:14,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:08:14,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:14,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:14,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:14,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:08:14,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:08:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-21 16:08:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:14,724 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 [2022-11-21 16:08:14,730 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 [2022-11-21 16:08:14,803 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 [2022-11-21 16:08:14,808 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 [2022-11-21 16:08:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:14,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499341357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:14,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:08:14,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 18 [2022-11-21 16:08:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275550129] [2022-11-21 16:08:14,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:14,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:14,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:14,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:08:14,880 INFO L87 Difference]: Start difference. First operand 254 states and 310 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) [2022-11-21 16:08:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:15,411 INFO L93 Difference]: Finished difference Result 402 states and 494 transitions. [2022-11-21 16:08:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:08:15,412 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 [2022-11-21 16:08:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:15,414 INFO L225 Difference]: With dead ends: 402 [2022-11-21 16:08:15,414 INFO L226 Difference]: Without dead ends: 402 [2022-11-21 16:08:15,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:08:15,415 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 339 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:15,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 617 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:08:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-21 16:08:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 272. [2022-11-21 16:08:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 235 states have (on average 1.353191489361702) internal successors, (318), 262 states have internal predecessors, (318), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-11-21 16:08:15,424 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 51 [2022-11-21 16:08:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:15,424 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-11-21 16:08:15,425 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) [2022-11-21 16:08:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-11-21 16:08:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:08:15,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:15,426 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] [2022-11-21 16:08:15,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:08:15,632 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)] === [2022-11-21 16:08:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 628100981, now seen corresponding path program 1 times [2022-11-21 16:08:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493705219] [2022-11-21 16:08:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:15,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:15,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493705219] [2022-11-21 16:08:15,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493705219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:15,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:15,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:08:15,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559627245] [2022-11-21 16:08:15,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:15,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:08:15,857 INFO L87 Difference]: Start difference. First operand 272 states and 338 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) [2022-11-21 16:08:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:16,147 INFO L93 Difference]: Finished difference Result 310 states and 385 transitions. [2022-11-21 16:08:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:08:16,147 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 [2022-11-21 16:08:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:16,149 INFO L225 Difference]: With dead ends: 310 [2022-11-21 16:08:16,149 INFO L226 Difference]: Without dead ends: 310 [2022-11-21 16:08:16,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:16,150 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 50 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:16,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 597 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:08:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-21 16:08:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 296. [2022-11-21 16:08:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 259 states have (on average 1.3745173745173744) internal successors, (356), 286 states have internal predecessors, (356), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 376 transitions. [2022-11-21 16:08:16,157 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 376 transitions. Word has length 52 [2022-11-21 16:08:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:16,157 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 376 transitions. [2022-11-21 16:08:16,157 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) [2022-11-21 16:08:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 376 transitions. [2022-11-21 16:08:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:08:16,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:16,158 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] [2022-11-21 16:08:16,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:08:16,158 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)] === [2022-11-21 16:08:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2003706554, now seen corresponding path program 1 times [2022-11-21 16:08:16,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:16,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366795649] [2022-11-21 16:08:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:16,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:16,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366795649] [2022-11-21 16:08:16,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366795649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31468536] [2022-11-21 16:08:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:16,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:16,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:16,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:08:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:08:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:16,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:17,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31468536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:17,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:17,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-21 16:08:17,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989984712] [2022-11-21 16:08:17,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:17,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 16:08:17,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:17,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 16:08:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:08:17,009 INFO L87 Difference]: Start difference. First operand 296 states and 376 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) [2022-11-21 16:08:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:17,282 INFO L93 Difference]: Finished difference Result 360 states and 436 transitions. [2022-11-21 16:08:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:08:17,283 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 [2022-11-21 16:08:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:17,285 INFO L225 Difference]: With dead ends: 360 [2022-11-21 16:08:17,285 INFO L226 Difference]: Without dead ends: 344 [2022-11-21 16:08:17,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:08:17,286 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 370 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:17,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 557 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:08:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-21 16:08:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 304. [2022-11-21 16:08:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 267 states have (on average 1.3670411985018727) internal successors, (365), 294 states have internal predecessors, (365), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 385 transitions. [2022-11-21 16:08:17,294 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 385 transitions. Word has length 53 [2022-11-21 16:08:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:17,295 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 385 transitions. [2022-11-21 16:08:17,295 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) [2022-11-21 16:08:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 385 transitions. [2022-11-21 16:08:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 16:08:17,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:17,296 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] [2022-11-21 16:08:17,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:17,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-21 16:08:17,503 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)] === [2022-11-21 16:08:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash -541993187, now seen corresponding path program 2 times [2022-11-21 16:08:17,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:17,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214435242] [2022-11-21 16:08:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:17,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:17,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 16:08:17,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:17,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214435242] [2022-11-21 16:08:17,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214435242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:17,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:17,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:08:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802559750] [2022-11-21 16:08:17,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:17,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:08:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:08:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:17,958 INFO L87 Difference]: Start difference. First operand 304 states and 385 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) [2022-11-21 16:08:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:18,406 INFO L93 Difference]: Finished difference Result 403 states and 506 transitions. [2022-11-21 16:08:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:08:18,407 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 [2022-11-21 16:08:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:18,408 INFO L225 Difference]: With dead ends: 403 [2022-11-21 16:08:18,409 INFO L226 Difference]: Without dead ends: 403 [2022-11-21 16:08:18,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:08:18,409 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 181 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:18,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 771 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:08:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-21 16:08:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 304. [2022-11-21 16:08:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 267 states have (on average 1.3558052434456929) internal successors, (362), 294 states have internal predecessors, (362), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 382 transitions. [2022-11-21 16:08:18,421 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 382 transitions. Word has length 57 [2022-11-21 16:08:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:18,422 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 382 transitions. [2022-11-21 16:08:18,422 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) [2022-11-21 16:08:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 382 transitions. [2022-11-21 16:08:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:08:18,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:18,423 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] [2022-11-21 16:08:18,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:08:18,424 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)] === [2022-11-21 16:08:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash 383583177, now seen corresponding path program 1 times [2022-11-21 16:08:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:18,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132389727] [2022-11-21 16:08:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:18,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:08:20,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:20,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132389727] [2022-11-21 16:08:20,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132389727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:20,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:20,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-21 16:08:20,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724464936] [2022-11-21 16:08:20,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:20,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:08:20,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:08:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:08:20,143 INFO L87 Difference]: Start difference. First operand 304 states and 382 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) [2022-11-21 16:08:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:21,837 INFO L93 Difference]: Finished difference Result 510 states and 630 transitions. [2022-11-21 16:08:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 16:08:21,840 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 [2022-11-21 16:08:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:21,842 INFO L225 Difference]: With dead ends: 510 [2022-11-21 16:08:21,842 INFO L226 Difference]: Without dead ends: 510 [2022-11-21 16:08:21,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:08:21,844 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 638 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:21,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 879 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 16:08:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-21 16:08:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 325. [2022-11-21 16:08:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 288 states have (on average 1.3611111111111112) internal successors, (392), 314 states have internal predecessors, (392), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 412 transitions. [2022-11-21 16:08:21,865 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 412 transitions. Word has length 58 [2022-11-21 16:08:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:21,865 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 412 transitions. [2022-11-21 16:08:21,866 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) [2022-11-21 16:08:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 412 transitions. [2022-11-21 16:08:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:08:21,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:21,867 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] [2022-11-21 16:08:21,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 16:08:21,867 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)] === [2022-11-21 16:08:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:21,868 INFO L85 PathProgramCache]: Analyzing trace with hash 383583178, now seen corresponding path program 1 times [2022-11-21 16:08:21,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:21,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937214590] [2022-11-21 16:08:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:21,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:22,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:08:24,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:24,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937214590] [2022-11-21 16:08:24,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937214590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:24,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:24,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-21 16:08:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097976954] [2022-11-21 16:08:24,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:24,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:08:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:08:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:08:24,128 INFO L87 Difference]: Start difference. First operand 325 states and 412 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) [2022-11-21 16:08:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:26,513 INFO L93 Difference]: Finished difference Result 566 states and 689 transitions. [2022-11-21 16:08:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:08:26,514 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 [2022-11-21 16:08:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:26,516 INFO L225 Difference]: With dead ends: 566 [2022-11-21 16:08:26,516 INFO L226 Difference]: Without dead ends: 566 [2022-11-21 16:08:26,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:08:26,517 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 653 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:26,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1052 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 16:08:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-21 16:08:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 325. [2022-11-21 16:08:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 288 states have (on average 1.3576388888888888) internal successors, (391), 314 states have internal predecessors, (391), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-21 16:08:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 411 transitions. [2022-11-21 16:08:26,528 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 411 transitions. Word has length 58 [2022-11-21 16:08:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:26,528 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 411 transitions. [2022-11-21 16:08:26,528 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) [2022-11-21 16:08:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 411 transitions. [2022-11-21 16:08:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-21 16:08:26,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:26,529 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] [2022-11-21 16:08:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 16:08:26,530 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)] === [2022-11-21 16:08:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1581411742, now seen corresponding path program 1 times [2022-11-21 16:08:26,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:26,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009097927] [2022-11-21 16:08:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:26,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:28,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-21 16:08:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 16:08:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009097927] [2022-11-21 16:08:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009097927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621754587] [2022-11-21 16:08:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:31,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:31,651 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:31,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30296c58-5887-4b05-aee2-dae654aa3db9/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:08:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:31,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-21 16:08:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:31,874 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 [2022-11-21 16:08:32,229 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 [2022-11-21 16:08:32,477 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 16:08:32,478 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 [2022-11-21 16:08:32,618 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 [2022-11-21 16:08:32,634 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 [2022-11-21 16:08:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:33,141 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 39 treesize of output 30 [2022-11-21 16:08:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:33,159 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 [2022-11-21 16:08:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:33,340 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-21 16:08:33,341 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 [2022-11-21 16:08:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:33,367 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 16:08:33,368 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 [2022-11-21 16:08:34,041 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-21 16:08:34,042 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 [2022-11-21 16:08:34,066 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 16:08:34,067 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 [2022-11-21 16:08:35,212 INFO L321 Elim1Store]: treesize reduction 68, result has 50.7 percent of original size [2022-11-21 16:08:35,213 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 [2022-11-21 16:08:35,261 INFO L321 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2022-11-21 16:08:35,262 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 [2022-11-21 16:08:36,145 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-21 16:08:36,145 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 [2022-11-21 16:08:38,454 INFO L321 Elim1Store]: treesize reduction 308, result has 32.6 percent of original size [2022-11-21 16:08:38,454 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 [2022-11-21 16:08:38,770 INFO L321 Elim1Store]: treesize reduction 232, result has 35.7 percent of original size [2022-11-21 16:08:38,770 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 [2022-11-21 16:09:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:09:43,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:45,526 INFO L321 Elim1Store]: treesize reduction 154, result has 5.5 percent of original size [2022-11-21 16:09:45,528 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 [2022-11-21 16:09:46,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:09:46,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:09:47,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:09:47,129 INFO L321 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-11-21 16:09:47,129 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