./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:30:27,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:30:27,547 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 04:30:27,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:30:27,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:30:27,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:30:27,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:30:27,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:30:27,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:30:27,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:30:27,604 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:30:27,604 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:30:27,606 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:30:27,608 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:30:27,608 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:30:27,609 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:30:27,609 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:30:27,610 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:30:27,610 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:30:27,611 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:30:27,611 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:30:27,612 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:30:27,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:30:27,613 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:30:27,613 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:30:27,614 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:30:27,614 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:30:27,614 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:30:27,615 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:30:27,615 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:30:27,615 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:30:27,616 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:30:27,616 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:30:27,616 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:30:27,617 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:30:27,617 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:30:27,617 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:30:27,617 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:30:27,618 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:30:27,618 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:30:27,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:30:27,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:30:27,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:30:27,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:30:27,620 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:30:27,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:30:27,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:30:27,621 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:30:27,621 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:30:27,622 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2024-11-09 04:30:27,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:30:27,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:30:27,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:30:27,926 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:30:27,927 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:30:27,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i Unable to find full path for "g++" [2024-11-09 04:30:29,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:30:30,296 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:30:30,297 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2024-11-09 04:30:30,312 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/data/b8ba91fe5/e4e229c6261d47a289ec127b8e67b486/FLAGb5cbf1f18 [2024-11-09 04:30:30,582 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/data/b8ba91fe5/e4e229c6261d47a289ec127b8e67b486 [2024-11-09 04:30:30,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:30:30,590 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:30:30,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:30:30,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:30:30,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:30:30,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:30:30" (1/1) ... [2024-11-09 04:30:30,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450c2169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:30, skipping insertion in model container [2024-11-09 04:30:30,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:30:30" (1/1) ... [2024-11-09 04:30:30,649 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:30:31,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:30:31,090 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:30:31,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:30:31,191 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:30:31,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31 WrapperNode [2024-11-09 04:30:31,192 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:30:31,193 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:30:31,193 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:30:31,193 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:30:31,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,247 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 134 [2024-11-09 04:30:31,248 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:30:31,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:30:31,249 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:30:31,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:30:31,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:30:31,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:30:31,283 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:30:31,283 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:30:31,284 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (1/1) ... [2024-11-09 04:30:31,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:30:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:31,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:30:31,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:30:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:30:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-09 04:30:31,358 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-09 04:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 04:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 04:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 04:30:31,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:30:31,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:30:31,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:30:31,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:30:31,532 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:30:31,534 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:30:31,877 INFO L? ?]: Removed 100 outVars from TransFormulas that were not future-live. [2024-11-09 04:30:31,877 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:30:31,941 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:30:31,941 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:30:31,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:30:31 BoogieIcfgContainer [2024-11-09 04:30:31,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:30:31,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:30:31,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:30:31,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:30:31,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:30:30" (1/3) ... [2024-11-09 04:30:31,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503260c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:30:31, skipping insertion in model container [2024-11-09 04:30:31,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:31" (2/3) ... [2024-11-09 04:30:31,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503260c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:30:31, skipping insertion in model container [2024-11-09 04:30:31,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:30:31" (3/3) ... [2024-11-09 04:30:31,957 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2024-11-09 04:30:31,998 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:30:31,998 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2024-11-09 04:30:32,078 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:30:32,087 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@80f09ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:30:32,088 INFO L334 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2024-11-09 04:30:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 71 states have internal predecessors, (87), 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) [2024-11-09 04:30:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 04:30:32,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:32,104 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 04:30:32,105 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:32,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash 206667308, now seen corresponding path program 1 times [2024-11-09 04:30:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:32,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871435291] [2024-11-09 04:30:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:32,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871435291] [2024-11-09 04:30:32,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871435291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:32,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:32,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892241797] [2024-11-09 04:30:32,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:32,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:32,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:32,481 INFO L87 Difference]: Start difference. First operand has 75 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 71 states have internal predecessors, (87), 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-09 04:30:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:32,603 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-11-09 04:30:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2024-11-09 04:30:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:32,616 INFO L225 Difference]: With dead ends: 72 [2024-11-09 04:30:32,617 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 04:30:32,619 INFO L431 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 [2024-11-09 04:30:32,624 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:32,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 124 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 04:30:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-09 04:30:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 66 states have internal predecessors, (79), 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) [2024-11-09 04:30:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-11-09 04:30:32,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 5 [2024-11-09 04:30:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:32,679 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-11-09 04:30:32,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-09 04:30:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-11-09 04:30:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 04:30:32,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:32,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 04:30:32,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:30:32,683 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:32,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash 206667309, now seen corresponding path program 1 times [2024-11-09 04:30:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217659268] [2024-11-09 04:30:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:32,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:32,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:32,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217659268] [2024-11-09 04:30:32,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217659268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:32,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:32,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:32,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362795594] [2024-11-09 04:30:32,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:32,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:32,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:32,879 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-09 04:30:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:32,963 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-11-09 04:30:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2024-11-09 04:30:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:32,966 INFO L225 Difference]: With dead ends: 68 [2024-11-09 04:30:32,966 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 04:30:32,967 INFO L431 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 [2024-11-09 04:30:32,969 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:32,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 04:30:32,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-09 04:30:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 64 states have internal predecessors, (77), 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) [2024-11-09 04:30:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2024-11-09 04:30:32,977 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 5 [2024-11-09 04:30:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:32,978 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2024-11-09 04:30:32,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2024-11-09 04:30:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2024-11-09 04:30:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 04:30:32,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:32,980 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:32,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:30:32,980 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:32,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1429136397, now seen corresponding path program 1 times [2024-11-09 04:30:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678666860] [2024-11-09 04:30:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:32,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:33,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678666860] [2024-11-09 04:30:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678666860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:33,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:33,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:30:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216414959] [2024-11-09 04:30:33,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:33,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:33,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:33,133 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-09 04:30:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:33,199 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-09 04:30:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10 [2024-11-09 04:30:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:33,203 INFO L225 Difference]: With dead ends: 75 [2024-11-09 04:30:33,203 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 04:30:33,203 INFO L431 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 [2024-11-09 04:30:33,204 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:33,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 04:30:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2024-11-09 04:30:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 66 states have internal predecessors, (79), 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) [2024-11-09 04:30:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-11-09 04:30:33,224 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 10 [2024-11-09 04:30:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:33,224 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-11-09 04:30:33,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-09 04:30:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-11-09 04:30:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 04:30:33,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:33,228 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:33,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:30:33,229 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:33,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash -160487279, now seen corresponding path program 1 times [2024-11-09 04:30:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297219350] [2024-11-09 04:30:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:30:33,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297219350] [2024-11-09 04:30:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297219350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:33,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:33,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:33,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675871786] [2024-11-09 04:30:33,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:33,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:30:33,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:30:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:33,421 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:33,568 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-11-09 04:30:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:33,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-09 04:30:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:33,570 INFO L225 Difference]: With dead ends: 69 [2024-11-09 04:30:33,570 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 04:30:33,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:33,572 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 1 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:33,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 265 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 04:30:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-09 04:30:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.813953488372093) internal successors, (78), 65 states have internal predecessors, (78), 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) [2024-11-09 04:30:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-11-09 04:30:33,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 18 [2024-11-09 04:30:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:33,580 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-11-09 04:30:33,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-11-09 04:30:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 04:30:33,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:33,594 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:33,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:30:33,595 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:33,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash -160487278, now seen corresponding path program 1 times [2024-11-09 04:30:33,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:33,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124555839] [2024-11-09 04:30:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:33,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:33,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:33,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124555839] [2024-11-09 04:30:33,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124555839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:33,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:33,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143458113] [2024-11-09 04:30:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:33,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:30:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:30:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:33,914 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:34,052 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-11-09 04:30:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-09 04:30:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:34,054 INFO L225 Difference]: With dead ends: 68 [2024-11-09 04:30:34,054 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 04:30:34,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:34,055 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:34,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 04:30:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-09 04:30:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 64 states have internal predecessors, (77), 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) [2024-11-09 04:30:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2024-11-09 04:30:34,067 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 18 [2024-11-09 04:30:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:34,068 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2024-11-09 04:30:34,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2024-11-09 04:30:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:30:34,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:34,069 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:34,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:30:34,070 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:34,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash 390714465, now seen corresponding path program 1 times [2024-11-09 04:30:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:34,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4199893] [2024-11-09 04:30:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:34,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4199893] [2024-11-09 04:30:34,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4199893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:34,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677384681] [2024-11-09 04:30:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:34,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:34,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:30:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:34,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 04:30:34,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:34,664 INFO L378 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 [2024-11-09 04:30:34,711 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-09 04:30:34,747 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 04:30:34,748 INFO L378 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 [2024-11-09 04:30:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-09 04:30:34,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677384681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412119097] [2024-11-09 04:30:35,012 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 04:30:35,012 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:35,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:35,022 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:35,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:36,884 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:30:36,914 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:40,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '922#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_16|) 1))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_circular_create_~data#1| 1))' at error location [2024-11-09 04:30:40,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:40,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:40,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 11 [2024-11-09 04:30:40,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295908632] [2024-11-09 04:30:40,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:40,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:30:40,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:40,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:30:40,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=438, Unknown=2, NotChecked=42, Total=552 [2024-11-09 04:30:40,399 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:30:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:40,686 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-09 04:30:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:30:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2024-11-09 04:30:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:40,688 INFO L225 Difference]: With dead ends: 67 [2024-11-09 04:30:40,688 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 04:30:40,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=75, Invalid=479, Unknown=2, NotChecked=44, Total=600 [2024-11-09 04:30:40,689 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:40,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 436 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2024-11-09 04:30:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 04:30:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-09 04:30:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 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) [2024-11-09 04:30:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-11-09 04:30:40,701 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 20 [2024-11-09 04:30:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:40,702 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-11-09 04:30:40,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:30:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-11-09 04:30:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 04:30:40,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:40,703 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:40,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:40,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:40,904 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:40,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 390714466, now seen corresponding path program 1 times [2024-11-09 04:30:40,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:40,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164327512] [2024-11-09 04:30:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:40,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:41,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164327512] [2024-11-09 04:30:41,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164327512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:41,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604145994] [2024-11-09 04:30:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:41,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:41,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:41,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:41,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:30:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:41,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 04:30:41,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:41,517 INFO L378 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 [2024-11-09 04:30:41,525 INFO L378 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 8 treesize of output 1 [2024-11-09 04:30:41,772 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:30:41,773 INFO L378 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 14 treesize of output 13 [2024-11-09 04:30:41,794 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:30:41,795 INFO L378 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 [2024-11-09 04:30:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:41,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:42,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604145994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469603596] [2024-11-09 04:30:42,036 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 04:30:42,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:42,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:42,036 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:42,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:43,021 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:30:43,044 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:44,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1163#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17| Int)) (<= (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_17|) 3)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_circular_create_~data#1| 1))' at error location [2024-11-09 04:30:44,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:44,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-09 04:30:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343689225] [2024-11-09 04:30:44,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:44,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 04:30:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 04:30:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=883, Unknown=1, NotChecked=0, Total=992 [2024-11-09 04:30:44,619 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:30:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:45,040 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2024-11-09 04:30:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2024-11-09 04:30:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:45,041 INFO L225 Difference]: With dead ends: 68 [2024-11-09 04:30:45,041 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 04:30:45,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=127, Invalid=1062, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 04:30:45,043 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:45,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 604 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 04:30:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-11-09 04:30:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.744186046511628) internal successors, (75), 62 states have internal predecessors, (75), 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) [2024-11-09 04:30:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-11-09 04:30:45,053 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 20 [2024-11-09 04:30:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:45,053 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-11-09 04:30:45,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:30:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-11-09 04:30:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 04:30:45,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:45,055 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:45,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:45,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:45,259 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:45,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 75669834, now seen corresponding path program 1 times [2024-11-09 04:30:45,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:45,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39833018] [2024-11-09 04:30:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:45,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:30:45,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:45,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39833018] [2024-11-09 04:30:45,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39833018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:45,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:45,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:45,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251127303] [2024-11-09 04:30:45,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:45,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:45,382 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:45,489 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2024-11-09 04:30:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-09 04:30:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:45,490 INFO L225 Difference]: With dead ends: 91 [2024-11-09 04:30:45,490 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 04:30:45,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:30:45,491 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 121 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:45,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 04:30:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2024-11-09 04:30:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 67 states have internal predecessors, (79), 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) [2024-11-09 04:30:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2024-11-09 04:30:45,496 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 24 [2024-11-09 04:30:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:45,496 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2024-11-09 04:30:45,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2024-11-09 04:30:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:30:45,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:45,497 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:45,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 04:30:45,497 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:45,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1949213244, now seen corresponding path program 1 times [2024-11-09 04:30:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:45,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491784220] [2024-11-09 04:30:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 04:30:45,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491784220] [2024-11-09 04:30:45,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491784220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:45,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:45,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:30:45,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341481098] [2024-11-09 04:30:45,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:45,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:45,671 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:45,876 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2024-11-09 04:30:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:45,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-09 04:30:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:45,880 INFO L225 Difference]: With dead ends: 76 [2024-11-09 04:30:45,880 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 04:30:45,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:30:45,881 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 40 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:45,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 360 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 04:30:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-09 04:30:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.6538461538461537) internal successors, (86), 71 states have internal predecessors, (86), 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) [2024-11-09 04:30:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-11-09 04:30:45,889 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 25 [2024-11-09 04:30:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:45,889 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-11-09 04:30:45,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-11-09 04:30:45,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:30:45,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:45,897 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:45,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:30:45,898 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:45,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:45,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1949213243, now seen corresponding path program 1 times [2024-11-09 04:30:45,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:45,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623375105] [2024-11-09 04:30:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:45,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:30:46,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623375105] [2024-11-09 04:30:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623375105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:46,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:46,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:30:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562089651] [2024-11-09 04:30:46,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:46,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:46,281 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:46,478 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2024-11-09 04:30:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-09 04:30:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:46,479 INFO L225 Difference]: With dead ends: 76 [2024-11-09 04:30:46,479 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 04:30:46,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:30:46,480 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 38 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:46,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 401 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 04:30:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-09 04:30:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 71 states have internal predecessors, (84), 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) [2024-11-09 04:30:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2024-11-09 04:30:46,485 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 25 [2024-11-09 04:30:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:46,485 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2024-11-09 04:30:46,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2024-11-09 04:30:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:30:46,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:46,487 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:46,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 04:30:46,487 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:46,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash -588055987, now seen corresponding path program 1 times [2024-11-09 04:30:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:46,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450512940] [2024-11-09 04:30:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:46,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450512940] [2024-11-09 04:30:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450512940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038149417] [2024-11-09 04:30:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:46,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:46,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:46,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:30:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:47,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 04:30:47,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:47,055 INFO L378 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 [2024-11-09 04:30:47,109 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:30:47,109 INFO L378 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 [2024-11-09 04:30:47,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:30:47,161 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:30:47,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:30:47,237 INFO L378 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 25 treesize of output 13 [2024-11-09 04:30:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:47,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:47,269 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-11-09 04:30:47,270 INFO L378 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 19 treesize of output 18 [2024-11-09 04:30:47,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:30:47,320 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-09 04:30:47,324 INFO L378 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 30 treesize of output 22 [2024-11-09 04:30:47,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:30:47,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038149417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391668044] [2024-11-09 04:30:47,400 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 04:30:47,402 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:47,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:47,403 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:47,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:48,306 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:30:48,327 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:50,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1945#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1)) (exists ((|v_#memory_$Pointer$.offset_87| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19| Int) (|v_#memory_int_81| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_89| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19|) 1) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_89| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19| (store (select |v_#memory_$Pointer$.base_89| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19|) 0 |ULTIMATE.start_main_~s~0#1.base|))) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_87| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19| (store (select |v_#memory_$Pointer$.offset_87| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19|) 0 0))) (= |#memory_int| (store |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19| (store (select |v_#memory_int_81| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_19|) 0)))))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:30:50,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:50,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:50,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2024-11-09 04:30:50,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100327932] [2024-11-09 04:30:50,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:50,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:30:50,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:30:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1093, Unknown=4, NotChecked=0, Total=1190 [2024-11-09 04:30:50,410 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2024-11-09 04:30:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:50,834 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2024-11-09 04:30:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:30:50,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) Word has length 27 [2024-11-09 04:30:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:50,836 INFO L225 Difference]: With dead ends: 99 [2024-11-09 04:30:50,836 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 04:30:50,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=112, Invalid=1366, Unknown=4, NotChecked=0, Total=1482 [2024-11-09 04:30:50,837 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 41 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:50,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 765 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 04:30:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2024-11-09 04:30:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:30:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2024-11-09 04:30:50,850 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 27 [2024-11-09 04:30:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:50,851 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2024-11-09 04:30:50,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 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) [2024-11-09 04:30:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2024-11-09 04:30:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 04:30:50,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:50,856 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:50,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:30:51,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 04:30:51,057 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:51,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash -588055986, now seen corresponding path program 1 times [2024-11-09 04:30:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:51,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695548922] [2024-11-09 04:30:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:51,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695548922] [2024-11-09 04:30:51,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695548922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671792484] [2024-11-09 04:30:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:51,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:51,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:51,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:30:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:52,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-09 04:30:52,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:52,051 INFO L378 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 8 treesize of output 1 [2024-11-09 04:30:52,056 INFO L378 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 [2024-11-09 04:30:52,180 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:30:52,181 INFO L378 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 [2024-11-09 04:30:52,185 INFO L378 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 14 treesize of output 9 [2024-11-09 04:30:52,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:30:52,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:30:52,248 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:30:52,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-09 04:30:52,256 INFO L378 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 24 treesize of output 11 [2024-11-09 04:30:52,362 INFO L378 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 25 treesize of output 13 [2024-11-09 04:30:52,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-09 04:30:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:52,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:52,497 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_512 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4))) (forall ((v_ArrVal_512 (Array Int Int)) (v_ArrVal_511 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_511) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))) is different from false [2024-11-09 04:30:52,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:30:52,518 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-11-09 04:30:52,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:30:52,529 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-11-09 04:30:52,538 INFO L378 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 52 treesize of output 44 [2024-11-09 04:30:52,547 INFO L378 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 82 treesize of output 70 [2024-11-09 04:30:52,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-09 04:30:52,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 04:30:52,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:30:52,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2024-11-09 04:30:52,571 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:30:52,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 18 treesize of output 10 [2024-11-09 04:30:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671792484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323515317] [2024-11-09 04:30:52,757 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 04:30:52,757 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:52,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:52,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:52,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:53,567 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:30:53,587 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:55,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2299#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_int_95| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21| Int) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_103| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_103| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21| (store (select |v_#memory_$Pointer$.offset_103| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21|) 0 0))) (= |#memory_int| (store |v_#memory_int_95| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21| (store (select |v_#memory_int_95| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21|) 0)))) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21|)) (= (store |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21| (store (select |v_#memory_$Pointer$.base_105| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_21|) 1))) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_sll_circular_update_at_~data#1|) (or (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 8)) (< (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) 0)) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:30:55,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:55,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:30:55,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2024-11-09 04:30:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956819769] [2024-11-09 04:30:55,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:55,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:30:55,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:55,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:30:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1525, Unknown=2, NotChecked=78, Total=1722 [2024-11-09 04:30:55,998 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:30:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:56,537 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2024-11-09 04:30:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:30:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-09 04:30:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:56,539 INFO L225 Difference]: With dead ends: 99 [2024-11-09 04:30:56,539 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 04:30:56,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=142, Invalid=1840, Unknown=2, NotChecked=86, Total=2070 [2024-11-09 04:30:56,541 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 21 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:56,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 750 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 04:30:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2024-11-09 04:30:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 81 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:30:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2024-11-09 04:30:56,546 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 27 [2024-11-09 04:30:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:56,546 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2024-11-09 04:30:56,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:30:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2024-11-09 04:30:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 04:30:56,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:56,547 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:56,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:30:56,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 04:30:56,748 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:56,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 385441386, now seen corresponding path program 2 times [2024-11-09 04:30:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:56,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275781411] [2024-11-09 04:30:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:30:56,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275781411] [2024-11-09 04:30:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275781411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:56,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:56,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:30:56,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543542790] [2024-11-09 04:30:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:56,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:30:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:56,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:30:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:56,880 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:56,984 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2024-11-09 04:30:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-09 04:30:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:56,985 INFO L225 Difference]: With dead ends: 106 [2024-11-09 04:30:56,985 INFO L226 Difference]: Without dead ends: 106 [2024-11-09 04:30:56,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:56,986 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 106 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:56,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 176 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-09 04:30:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2024-11-09 04:30:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 85 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:30:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2024-11-09 04:30:56,993 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 30 [2024-11-09 04:30:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:56,993 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2024-11-09 04:30:56,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:30:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2024-11-09 04:30:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:30:56,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:56,997 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:30:56,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 04:30:56,997 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:30:56,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 441133850, now seen corresponding path program 1 times [2024-11-09 04:30:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:56,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764546395] [2024-11-09 04:30:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:56,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:30:57,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764546395] [2024-11-09 04:30:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764546395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564602494] [2024-11-09 04:30:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:57,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:57,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:57,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:57,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:30:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:57,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:30:57,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:30:57,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:30:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564602494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824423135] [2024-11-09 04:30:57,415 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 04:30:57,415 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:57,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:57,416 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:57,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:58,599 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:30:58,617 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:13,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1824423135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:13,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:13,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 5, 5] total 27 [2024-11-09 04:31:13,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959650087] [2024-11-09 04:31:13,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:13,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 04:31:13,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 04:31:13,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=575, Unknown=5, NotChecked=0, Total=702 [2024-11-09 04:31:13,586 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 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) [2024-11-09 04:31:16,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:20,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:22,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:25,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:27,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:29,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:31,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:33,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:35,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:38,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:40,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:43,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:45,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:47,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:49,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:52,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:54,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:56,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:58,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:00,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:02,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:05,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:07,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:09,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:11,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:13,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:16,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:18,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:20,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:22,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:24,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:26,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:29,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:31,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:33,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:35,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:37,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:40,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:42,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:44,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:46,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:32:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:47,691 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2024-11-09 04:32:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 04:32:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 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) Word has length 33 [2024-11-09 04:32:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:47,693 INFO L225 Difference]: With dead ends: 103 [2024-11-09 04:32:47,693 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 04:32:47,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=182, Invalid=805, Unknown=5, NotChecked=0, Total=992 [2024-11-09 04:32:47,694 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 10 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:47,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 277 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 675 Invalid, 44 Unknown, 0 Unchecked, 92.2s Time] [2024-11-09 04:32:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 04:32:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2024-11-09 04:32:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 83 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2024-11-09 04:32:47,698 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 33 [2024-11-09 04:32:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:47,699 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2024-11-09 04:32:47,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 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) [2024-11-09 04:32:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2024-11-09 04:32:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 04:32:47,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:47,701 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:47,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:32:47,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 04:32:47,901 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:32:47,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash 970477759, now seen corresponding path program 1 times [2024-11-09 04:32:47,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268189188] [2024-11-09 04:32:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:32:48,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268189188] [2024-11-09 04:32:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268189188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418853520] [2024-11-09 04:32:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:48,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:48,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:32:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:48,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:32:48,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:32:48,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 04:32:48,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418853520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:48,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659233584] [2024-11-09 04:32:48,406 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 04:32:48,407 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:48,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:48,407 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:48,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:49,617 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:32:49,638 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:55,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3342#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.base_49| Int)) (and (exists ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25| Int) (|v_#memory_int_138| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_148| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_146| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_146| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25| (store (select |v_#memory_$Pointer$.offset_146| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25|) 0 0))) (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25|) 1) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_148| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25| (store (select |v_#memory_$Pointer$.base_148| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25|) 0 |ULTIMATE.start_main_~s~0#1.base|))) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25|)) (= |#memory_int| (store |v_#memory_int_138| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25| (store (select |v_#memory_int_138| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_25|) 0)))))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_49| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (not (= (select |#valid| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_49|) 1)))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:32:55,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:55,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:32:55,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-09 04:32:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042447418] [2024-11-09 04:32:55,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:55,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:32:55,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:32:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-11-09 04:32:55,497 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:32:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:55,692 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2024-11-09 04:32:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:32:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-11-09 04:32:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:55,693 INFO L225 Difference]: With dead ends: 98 [2024-11-09 04:32:55,693 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 04:32:55,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=132, Invalid=679, Unknown=1, NotChecked=0, Total=812 [2024-11-09 04:32:55,695 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 111 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:55,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 267 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:32:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 04:32:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2024-11-09 04:32:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 79 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:32:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2024-11-09 04:32:55,702 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 34 [2024-11-09 04:32:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:55,703 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2024-11-09 04:32:55,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:32:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2024-11-09 04:32:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 04:32:55,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:55,720 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-09 04:32:55,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:32:55,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:32:55,921 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:32:55,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -791647681, now seen corresponding path program 1 times [2024-11-09 04:32:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:55,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209841455] [2024-11-09 04:32:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:32:56,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:56,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209841455] [2024-11-09 04:32:56,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209841455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:56,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292437259] [2024-11-09 04:32:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:56,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:56,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:56,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:32:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:56,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:32:56,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:32:56,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:32:56,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292437259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:56,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356936466] [2024-11-09 04:32:56,440 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 04:32:56,440 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:56,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:56,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:56,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:57,804 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:32:57,824 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:35,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3765#(and (exists ((|v_#memory_$Pointer$.base_174| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_171| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_172| (Array Int (Array Int Int))) (|v_#memory_int_161| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| Int) (|v_#memory_int_162| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_169| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_172| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.offset_172| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)))) (= (store |v_#memory_$Pointer$.base_174| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.base_174| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4))) |#memory_$Pointer$.base|) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|)) (= |v_#memory_$Pointer$.offset_172| (store (store |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 0)) (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 0)) (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |v_#memory_$Pointer$.offset_169| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) (select (select |v_#memory_$Pointer$.offset_172| (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |v_#memory_$Pointer$.offset_169| |ULTIMATE.start_main_~s~0#1.base|) 0) 4))))) (= (store (store |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4) (select (select |v_#memory_$Pointer$.base_174| (select (select (store |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.base_171| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_$Pointer$.offset_169| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4)))) |v_#memory_$Pointer$.base_174|) (= (store |v_#memory_int_161| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27| (store (select |v_#memory_int_161| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0 (select (select |v_#memory_int_162| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 0))) |v_#memory_int_162|) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1) (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_27|) 1) (= |#memory_int| (store (store |v_#memory_int_162| (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_162| (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |v_#memory_$Pointer$.offset_169| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) 3)) |ULTIMATE.start_main_~s~0#1.base| (store (select (store |v_#memory_int_162| (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_162| (select (select |v_#memory_$Pointer$.base_171| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |v_#memory_$Pointer$.offset_169| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) 3)) |ULTIMATE.start_main_~s~0#1.base|) 4 2))))) (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1)) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_main_~expected~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:33:35,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:35,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-09 04:33:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854294493] [2024-11-09 04:33:35,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:35,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:33:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:33:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=710, Unknown=12, NotChecked=0, Total=870 [2024-11-09 04:33:35,339 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:33:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:35,473 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2024-11-09 04:33:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:33:35,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-09 04:33:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:35,475 INFO L225 Difference]: With dead ends: 100 [2024-11-09 04:33:35,475 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 04:33:35,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=177, Invalid=803, Unknown=12, NotChecked=0, Total=992 [2024-11-09 04:33:35,476 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 113 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:35,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 160 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:33:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 04:33:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-11-09 04:33:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 88 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:33:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2024-11-09 04:33:35,481 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 36 [2024-11-09 04:33:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:35,481 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2024-11-09 04:33:35,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:33:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2024-11-09 04:33:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 04:33:35,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:35,483 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:35,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:33:35,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 04:33:35,684 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:33:35,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1779155847, now seen corresponding path program 3 times [2024-11-09 04:33:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:35,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336904464] [2024-11-09 04:33:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:33:35,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336904464] [2024-11-09 04:33:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336904464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94881349] [2024-11-09 04:33:35,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:33:35,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:35,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:35,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:35,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:33:35,996 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:33:35,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:36,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 04:33:36,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:36,015 INFO L378 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 [2024-11-09 04:33:36,161 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:33:36,161 INFO L378 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 14 treesize of output 13 [2024-11-09 04:33:36,389 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-09 04:33:36,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 28 [2024-11-09 04:33:36,502 INFO L378 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 15 treesize of output 1 [2024-11-09 04:33:36,598 INFO L378 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 26 treesize of output 19 [2024-11-09 04:33:36,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-09 04:33:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:33:36,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:37,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:37,162 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2024-11-09 04:33:37,168 INFO L378 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 34 treesize of output 26 [2024-11-09 04:33:37,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:33:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94881349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424626991] [2024-11-09 04:33:37,544 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 04:33:37,545 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:37,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:37,545 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:37,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:38,293 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:33:38,316 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:41,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4158#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1)) (exists ((|v_#memory_$Pointer$.base_190| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_186| (Array Int (Array Int Int))) (|v_#memory_int_178| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29| Int)) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_186| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29| (store (select |v_#memory_$Pointer$.offset_186| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29|) 0 0))) (= |#memory_int| (store |v_#memory_int_178| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29| (store (select |v_#memory_int_178| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29|) 0 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29|) 0)))) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29|)) (= (store |v_#memory_$Pointer$.base_190| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29| (store (select |v_#memory_$Pointer$.base_190| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_29|) 1))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:33:41,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:41,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:33:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 19] total 22 [2024-11-09 04:33:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807120942] [2024-11-09 04:33:41,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:41,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 04:33:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:41,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 04:33:41,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1820, Unknown=10, NotChecked=0, Total=1980 [2024-11-09 04:33:41,045 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 04:33:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:41,839 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2024-11-09 04:33:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:33:41,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2024-11-09 04:33:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:41,840 INFO L225 Difference]: With dead ends: 78 [2024-11-09 04:33:41,840 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 04:33:41,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=221, Invalid=2631, Unknown=10, NotChecked=0, Total=2862 [2024-11-09 04:33:41,842 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:41,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 468 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:33:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 04:33:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-09 04:33:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 74 states have internal predecessors, (88), 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) [2024-11-09 04:33:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2024-11-09 04:33:41,846 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 37 [2024-11-09 04:33:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:41,847 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2024-11-09 04:33:41,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 04:33:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2024-11-09 04:33:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:33:41,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:41,848 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:41,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:42,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:33:42,049 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:33:42,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash 161712340, now seen corresponding path program 2 times [2024-11-09 04:33:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:42,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972623737] [2024-11-09 04:33:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:42,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:43,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972623737] [2024-11-09 04:33:43,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972623737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097818720] [2024-11-09 04:33:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:33:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:43,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:43,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:43,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:33:43,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 04:33:43,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:33:43,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 04:33:43,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:43,775 INFO L378 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 [2024-11-09 04:33:43,846 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:33:43,846 INFO L378 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 [2024-11-09 04:33:43,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:33:43,953 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:33:43,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:33:44,158 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:33:44,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:33:44,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:44,248 INFO L378 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 37 treesize of output 17 [2024-11-09 04:33:44,338 INFO L378 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 25 treesize of output 13 [2024-11-09 04:33:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:33:44,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:44,871 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1069 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1069) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2024-11-09 04:33:44,902 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-09 04:33:44,902 INFO L378 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 29 treesize of output 28 [2024-11-09 04:33:45,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:45,028 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2024-11-09 04:33:45,033 INFO L378 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 136 treesize of output 112 [2024-11-09 04:33:45,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2024-11-09 04:33:45,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-09 04:33:45,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097818720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237970326] [2024-11-09 04:33:45,267 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 04:33:45,267 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:45,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:45,268 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:45,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:46,351 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:33:46,367 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:34:27,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4572#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1)) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_main_~expected~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_$Pointer$.offset_205| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| Int) (|v_#memory_$Pointer$.base_213| (Array Int (Array Int Int))) (|v_#memory_int_194| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_210| (Array Int (Array Int Int))) (|v_#memory_int_195| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_202| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_int_195| (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_195| (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_202| |ULTIMATE.start_main_~s~0#1.base|) 0)) 3)) |ULTIMATE.start_main_~s~0#1.base| (store (select (store |v_#memory_int_195| (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_195| (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_202| |ULTIMATE.start_main_~s~0#1.base|) 0)) 3)) |ULTIMATE.start_main_~s~0#1.base|) 4 2)) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_205| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.offset_205| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)))) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|)) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1) (= (store (store |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4) (select (select |v_#memory_$Pointer$.base_213| (select (select (store |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.base_210| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4)))) |v_#memory_$Pointer$.base_213|) (= (store |v_#memory_$Pointer$.base_213| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.base_213| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4))) |#memory_$Pointer$.base|) (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 1) (= (store |v_#memory_int_194| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_int_194| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 (select (select |v_#memory_int_195| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0))) |v_#memory_int_195|) (= |v_#memory_$Pointer$.offset_205| (store (store |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 0)) (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31| (store (select |v_#memory_$Pointer$.offset_202| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_31|) 0 0)) (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_202| |ULTIMATE.start_main_~s~0#1.base|) 0)) (select (select |v_#memory_$Pointer$.offset_205| (select (select |v_#memory_$Pointer$.base_210| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_202| |ULTIMATE.start_main_~s~0#1.base|) 0)))))))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:34:27,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:34:27,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:34:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 23 [2024-11-09 04:34:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142738496] [2024-11-09 04:34:27,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:34:27,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 04:34:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:34:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 04:34:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2642, Unknown=44, NotChecked=104, Total=2970 [2024-11-09 04:34:27,702 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 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) [2024-11-09 04:34:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:28,423 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2024-11-09 04:34:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:34:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 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) Word has length 40 [2024-11-09 04:34:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:28,424 INFO L225 Difference]: With dead ends: 90 [2024-11-09 04:34:28,425 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 04:34:28,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=201, Invalid=3063, Unknown=46, NotChecked=112, Total=3422 [2024-11-09 04:34:28,426 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:28,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 809 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:34:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 04:34:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-11-09 04:34:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.5857142857142856) internal successors, (111), 85 states have internal predecessors, (111), 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) [2024-11-09 04:34:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2024-11-09 04:34:28,432 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 40 [2024-11-09 04:34:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:28,433 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2024-11-09 04:34:28,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 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) [2024-11-09 04:34:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2024-11-09 04:34:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:34:28,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:28,434 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:28,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:34:28,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:34:28,635 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:34:28,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:28,635 INFO L85 PathProgramCache]: Analyzing trace with hash 161712341, now seen corresponding path program 1 times [2024-11-09 04:34:28,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:28,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162610094] [2024-11-09 04:34:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:28,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:34:30,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:34:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162610094] [2024-11-09 04:34:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162610094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898803280] [2024-11-09 04:34:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:30,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:30,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:34:30,147 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:34:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:34:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:34:30,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-09 04:34:30,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:34:30,341 INFO L378 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 [2024-11-09 04:34:30,615 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:34:30,616 INFO L378 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 [2024-11-09 04:34:30,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-09 04:34:30,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:34:30,769 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:34:30,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2024-11-09 04:34:30,774 INFO L378 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 24 treesize of output 11 [2024-11-09 04:34:30,991 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:34:30,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2024-11-09 04:34:30,997 INFO L378 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 24 [2024-11-09 04:34:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:34:31,168 INFO L378 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 43 treesize of output 23 [2024-11-09 04:34:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:34:31,175 INFO L378 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 42 treesize of output 22 [2024-11-09 04:34:31,308 INFO L378 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 31 treesize of output 19 [2024-11-09 04:34:31,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 26 treesize of output 14 [2024-11-09 04:34:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:34:31,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:34:31,645 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse1 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (and (forall ((v_ArrVal_1185 (Array Int Int))) (or (not (= v_ArrVal_1185 (store .cse0 .cse1 (select v_ArrVal_1185 .cse1)))) (< 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1185) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))) (forall ((v_ArrVal_1185 (Array Int Int))) (or (not (= v_ArrVal_1185 (store .cse0 .cse1 (select v_ArrVal_1185 .cse1)))) (forall ((v_ArrVal_1186 Int)) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1185) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse1 v_ArrVal_1186)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))) is different from false [2024-11-09 04:34:31,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:34:31,837 INFO L378 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 42 treesize of output 46 [2024-11-09 04:34:31,869 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1183 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1183) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4))) (forall ((v_prenex_5 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_prenex_5) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 1))) (forall ((v_ArrVal_1182 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1182) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|))) is different from false [2024-11-09 04:34:32,041 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_prenex_5 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_5) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1))) (forall ((v_ArrVal_1182 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1182) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse0)) (forall ((v_ArrVal_1183 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1183) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4))))) is different from false [2024-11-09 04:34:32,066 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1181 (Array Int Int)) (v_ArrVal_1180 (Array Int Int)) (v_ArrVal_1183 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1180) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1181) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_1183) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4))) (forall ((v_ArrVal_1181 (Array Int Int)) (v_ArrVal_1182 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1181))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_1182) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse1)))) (forall ((v_ArrVal_1181 (Array Int Int)) (v_ArrVal_1180 (Array Int Int)) (v_prenex_5 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1180))) (< (select (select (store .cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1181) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_prenex_5) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (+ 1 (select (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) is different from false [2024-11-09 04:34:32,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:34:32,092 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2024-11-09 04:34:32,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:34:32,100 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2024-11-09 04:34:32,103 INFO L378 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 54 treesize of output 46 [2024-11-09 04:34:32,108 INFO L378 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 290 treesize of output 270 [2024-11-09 04:34:32,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-11-09 04:34:32,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 04:34:32,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-09 04:34:32,139 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 04:34:32,139 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 1 [2024-11-09 04:34:32,145 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 04:34:32,146 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 1 [2024-11-09 04:34:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898803280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:34:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177480189] [2024-11-09 04:34:32,365 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 04:34:32,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:34:32,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:34:32,365 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:34:32,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:34:33,325 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:34:33,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:18,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5024#(and (<= 1 |#StackHeapBarrier|) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (exists ((|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| Int) (|v_#memory_$Pointer$.offset_225| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_228| (Array Int (Array Int Int))) (|v_#memory_int_213| (Array Int (Array Int Int))) (|v_#memory_int_214| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_236| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_233| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_213| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_int_213| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 (select (select |v_#memory_int_214| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0))) |v_#memory_int_214|) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|)) (= (store (store |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4) (select (select |v_#memory_$Pointer$.offset_228| (select (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4)))) |v_#memory_$Pointer$.offset_228|) (<= (+ (select (select |v_#memory_$Pointer$.offset_225| |ULTIMATE.start_main_~s~0#1.base|) 0) 8) (select |#length| (select (select |v_#memory_$Pointer$.base_233| |ULTIMATE.start_main_~s~0#1.base|) 0))) (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 1) (= (store |v_#memory_$Pointer$.base_236| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.base_236| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_228| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.offset_228| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)))) (= (store (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4) (select (select |v_#memory_$Pointer$.base_236| (select (select (store |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.base_233| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_225| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_33|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4)))) |v_#memory_$Pointer$.base_236|) (= |#memory_int| (store (store |v_#memory_int_214| (select (select |v_#memory_$Pointer$.base_233| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_214| (select (select |v_#memory_$Pointer$.base_233| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |v_#memory_$Pointer$.offset_225| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) 3)) |ULTIMATE.start_main_~s~0#1.base| (store (select (store |v_#memory_int_214| (select (select |v_#memory_$Pointer$.base_233| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_214| (select (select |v_#memory_$Pointer$.base_233| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |v_#memory_$Pointer$.offset_225| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) 3)) |ULTIMATE.start_main_~s~0#1.base|) 4 2))) (<= 0 (+ (select (select |v_#memory_$Pointer$.offset_225| |ULTIMATE.start_main_~s~0#1.base|) 0) 4)))) (= |ULTIMATE.start_main_~i~0#1| 1) (or (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 8)) (< (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4) 0)) (= 3 |ULTIMATE.start_main_~expected~0#1|) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:35:18,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:18,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:35:18,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2024-11-09 04:35:18,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79671535] [2024-11-09 04:35:18,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:18,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 04:35:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 04:35:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4316, Unknown=26, NotChecked=540, Total=5112 [2024-11-09 04:35:18,312 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand has 38 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:35:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:19,691 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2024-11-09 04:35:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:35:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2024-11-09 04:35:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:19,692 INFO L225 Difference]: With dead ends: 90 [2024-11-09 04:35:19,692 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 04:35:19,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=288, Invalid=5104, Unknown=26, NotChecked=588, Total=6006 [2024-11-09 04:35:19,695 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:19,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1127 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:35:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 04:35:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-11-09 04:35:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 85 states have internal predecessors, (107), 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) [2024-11-09 04:35:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2024-11-09 04:35:19,701 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 40 [2024-11-09 04:35:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:19,701 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2024-11-09 04:35:19,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:35:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2024-11-09 04:35:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:35:19,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:19,703 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:19,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:35:19,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:19,908 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:35:19,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1377849497, now seen corresponding path program 1 times [2024-11-09 04:35:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052483735] [2024-11-09 04:35:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:35:22,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052483735] [2024-11-09 04:35:22,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052483735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186274156] [2024-11-09 04:35:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:22,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:22,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:22,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:35:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:23,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-09 04:35:23,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:23,085 INFO L378 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 [2024-11-09 04:35:23,422 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:35:23,423 INFO L378 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 [2024-11-09 04:35:23,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:35:23,610 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:35:23,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-11-09 04:35:23,885 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:35:23,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2024-11-09 04:35:23,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 17 [2024-11-09 04:35:23,896 INFO L378 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 34 treesize of output 21 [2024-11-09 04:35:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:35:24,081 INFO L378 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 45 treesize of output 25 [2024-11-09 04:35:24,088 INFO L378 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 26 treesize of output 21 [2024-11-09 04:35:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:35:24,094 INFO L378 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 37 treesize of output 21 [2024-11-09 04:35:24,296 INFO L378 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 33 treesize of output 21 [2024-11-09 04:35:24,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 21 treesize of output 13 [2024-11-09 04:35:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:35:24,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:24,684 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1301 (Array Int Int)) (v_ArrVal_1298 Int) (v_ArrVal_1300 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (or (= (* |c_ULTIMATE.start_main_~len~0#1| 2) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1301) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 v_ArrVal_1298)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1300) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4)) 1)) (not (= (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_1300 .cse0)) v_ArrVal_1300))))) is different from false [2024-11-09 04:35:24,729 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_87| Int) (v_ArrVal_1301 (Array Int Int))) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_87| |c_ULTIMATE.start_main_~s~0#1.offset|) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1301) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4)) 1) (* |c_ULTIMATE.start_main_~len~0#1| 2)))) is different from false [2024-11-09 04:35:24,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:35:24,875 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2024-11-09 04:35:24,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:35:24,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2024-11-09 04:35:24,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 18 [2024-11-09 04:35:25,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:35:25,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2024-11-09 04:35:25,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 04:35:25,355 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1294 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2024-11-09 04:35:25,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:35:25,366 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-11-09 04:35:25,370 INFO L378 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 33 treesize of output 25 [2024-11-09 04:35:25,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-09 04:35:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-09 04:35:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186274156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:26,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727901584] [2024-11-09 04:35:26,068 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:35:26,069 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:26,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:26,069 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:26,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:27,132 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:35:27,154 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:46,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5553#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4)) 3)) (<= 0 (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4)) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1) (<= 0 (+ (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4)) 2147483648)) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 8) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0))) (<= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4)) 2147483647) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_259| (Array Int (Array Int Int))) (|v_#memory_int_247| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_269| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110| Int)) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_269| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110| (store (select |v_#memory_$Pointer$.base_269| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4))))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4)) 3) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_259| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110| (store (select |v_#memory_$Pointer$.offset_259| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4))))) (= |#memory_int| (store |v_#memory_int_247| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110| (store (select |v_#memory_int_247| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4) (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4))))) (= (select |#valid| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) 1) (<= 0 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4)) (<= (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 8) (select |#length| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|)) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_update_at_~head#1.base_110|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_101| 4))))))' at error location [2024-11-09 04:35:46,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:46,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:46,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 23] total 63 [2024-11-09 04:35:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159070299] [2024-11-09 04:35:46,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:46,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 04:35:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 04:35:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=6464, Unknown=24, NotChecked=492, Total=7310 [2024-11-09 04:35:46,399 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 63 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 54 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:35:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:35:49,384 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2024-11-09 04:35:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:35:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 54 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-11-09 04:35:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:35:49,386 INFO L225 Difference]: With dead ends: 97 [2024-11-09 04:35:49,386 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 04:35:49,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=485, Invalid=8815, Unknown=24, NotChecked=576, Total=9900 [2024-11-09 04:35:49,389 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 306 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:35:49,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1567 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1221 Invalid, 0 Unknown, 287 Unchecked, 1.4s Time] [2024-11-09 04:35:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 04:35:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2024-11-09 04:35:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 86 states have internal predecessors, (108), 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) [2024-11-09 04:35:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2024-11-09 04:35:49,394 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 43 [2024-11-09 04:35:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:35:49,394 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2024-11-09 04:35:49,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 54 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 04:35:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2024-11-09 04:35:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 04:35:49,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:35:49,396 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:35:49,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 04:35:49,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:49,597 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:35:49,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:35:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1391232443, now seen corresponding path program 3 times [2024-11-09 04:35:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:35:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904325409] [2024-11-09 04:35:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:35:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:35:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 04:35:49,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:49,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904325409] [2024-11-09 04:35:49,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904325409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:49,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460679649] [2024-11-09 04:35:49,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:35:49,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:49,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:49,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:49,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:35:50,015 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:35:50,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:35:50,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 04:35:50,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:35:50,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:35:50,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460679649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146039326] [2024-11-09 04:35:50,315 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-09 04:35:50,315 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:50,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:50,316 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:50,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:51,765 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:35:51,785 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:28,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6057#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1)) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_main_~expected~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_$Pointer$.base_290| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_280| (Array Int (Array Int Int))) (|v_#memory_int_265| (Array Int (Array Int Int))) (|v_#memory_int_266| (Array Int (Array Int Int))) (|v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| Int) (|v_#memory_$Pointer$.base_287| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_277| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 1) (= (store |v_#memory_$Pointer$.base_290| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.base_290| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 4))) |#memory_$Pointer$.base|) (= |#memory_int| (store (store |v_#memory_int_266| (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_266| (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_277| |ULTIMATE.start_main_~s~0#1.base|) 0)) 3)) |ULTIMATE.start_main_~s~0#1.base| (store (select (store |v_#memory_int_266| (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select |v_#memory_int_266| (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_277| |ULTIMATE.start_main_~s~0#1.base|) 0)) 3)) |ULTIMATE.start_main_~s~0#1.base|) 4 2))) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0)) 1) (= (store (store |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 |ULTIMATE.start_main_~s~0#1.base|)) (select (select (store |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4) (select (select |v_#memory_$Pointer$.base_290| (select (select (store |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.base_287| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 |ULTIMATE.start_main_~s~0#1.base|)) |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select (store |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 0)) |ULTIMATE.start_main_~s~0#1.base|) 0) 4)))) |v_#memory_$Pointer$.base_290|) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|)) (= (store |v_#memory_int_265| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_int_265| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 (select (select |v_#memory_int_266| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0))) |v_#memory_int_266|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_280| |ULTIMATE.start_main_~s~0#1.base| (store (select |v_#memory_$Pointer$.offset_280| |ULTIMATE.start_main_~s~0#1.base|) 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 4)))) (= (store (store |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 0)) (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37| (store (select |v_#memory_$Pointer$.offset_277| |v_ULTIMATE.start_sll_circular_create_~last~0#1.base_37|) 0 0)) (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_277| |ULTIMATE.start_main_~s~0#1.base|) 0)) (select (select |v_#memory_$Pointer$.offset_280| (select (select |v_#memory_$Pointer$.base_287| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ 4 (select (select |v_#memory_$Pointer$.offset_277| |ULTIMATE.start_main_~s~0#1.base|) 0))))) |v_#memory_$Pointer$.offset_280|))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:36:28,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:28,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:28,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 13 [2024-11-09 04:36:28,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976180270] [2024-11-09 04:36:28,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:28,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:36:28,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:36:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1032, Unknown=13, NotChecked=0, Total=1260 [2024-11-09 04:36:28,490 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:36:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:28,915 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2024-11-09 04:36:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:36:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-09 04:36:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:28,916 INFO L225 Difference]: With dead ends: 78 [2024-11-09 04:36:28,916 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 04:36:28,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=339, Invalid=1628, Unknown=13, NotChecked=0, Total=1980 [2024-11-09 04:36:28,918 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:28,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 265 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 04:36:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-09 04:36:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 74 states have internal predecessors, (81), 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) [2024-11-09 04:36:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2024-11-09 04:36:28,922 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 43 [2024-11-09 04:36:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:28,922 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2024-11-09 04:36:28,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:36:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2024-11-09 04:36:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:36:28,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:28,923 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:28,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 04:36:29,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:29,128 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:29,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1349994925, now seen corresponding path program 1 times [2024-11-09 04:36:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:29,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427357146] [2024-11-09 04:36:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:36:29,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427357146] [2024-11-09 04:36:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427357146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993016689] [2024-11-09 04:36:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:29,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:29,406 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:29,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:36:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:29,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:36:29,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:36:29,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:29,772 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 04:36:29,772 INFO L378 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 12 treesize of output 11 [2024-11-09 04:36:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:36:29,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993016689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:29,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808484242] [2024-11-09 04:36:29,803 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 04:36:29,803 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:29,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:29,804 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:29,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:31,063 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:36:31,077 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:34,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6528#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_61| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_61|) 1))) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:36:34,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:34,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:34,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 9 [2024-11-09 04:36:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742602648] [2024-11-09 04:36:34,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:34,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:36:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:36:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1021, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 04:36:34,387 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:36:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:34,603 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2024-11-09 04:36:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:36:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-09 04:36:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:34,606 INFO L225 Difference]: With dead ends: 76 [2024-11-09 04:36:34,606 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 04:36:34,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=105, Invalid=1084, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 04:36:34,607 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:34,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 345 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 04:36:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-09 04:36:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 72 states have internal predecessors, (79), 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) [2024-11-09 04:36:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2024-11-09 04:36:34,611 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 45 [2024-11-09 04:36:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:34,612 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2024-11-09 04:36:34,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 04:36:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2024-11-09 04:36:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:36:34,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:34,613 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:34,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 04:36:34,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:34,817 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:34,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1349994924, now seen corresponding path program 1 times [2024-11-09 04:36:34,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916579235] [2024-11-09 04:36:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:36:35,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916579235] [2024-11-09 04:36:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916579235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599615334] [2024-11-09 04:36:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:35,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:35,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:35,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:36:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:35,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 04:36:35,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:35,493 INFO L378 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 8 treesize of output 1 [2024-11-09 04:36:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:36:35,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:36:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599615334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966061722] [2024-11-09 04:36:36,228 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-09 04:36:36,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:36,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:36,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:36,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:37,187 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:36:37,206 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:41,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6993#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:36:41,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:41,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:41,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-09 04:36:41,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060793527] [2024-11-09 04:36:41,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:41,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 04:36:41,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 04:36:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1918, Unknown=1, NotChecked=0, Total=2070 [2024-11-09 04:36:41,136 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 23 states, 19 states have (on average 4.842105263157895) internal successors, (92), 20 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 04:36:41,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:41,401 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2024-11-09 04:36:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:36:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.842105263157895) internal successors, (92), 20 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2024-11-09 04:36:41,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:41,402 INFO L225 Difference]: With dead ends: 74 [2024-11-09 04:36:41,402 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 04:36:41,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=159, Invalid=2002, Unknown=1, NotChecked=0, Total=2162 [2024-11-09 04:36:41,403 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:41,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 535 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 04:36:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-09 04:36:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 69 states have internal predecessors, (76), 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) [2024-11-09 04:36:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2024-11-09 04:36:41,407 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 45 [2024-11-09 04:36:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:41,407 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2024-11-09 04:36:41,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.842105263157895) internal successors, (92), 20 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 04:36:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2024-11-09 04:36:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 04:36:41,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:41,408 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:41,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 04:36:41,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 04:36:41,612 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:41,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 378084744, now seen corresponding path program 1 times [2024-11-09 04:36:41,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:41,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495430430] [2024-11-09 04:36:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:41,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 04:36:42,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495430430] [2024-11-09 04:36:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495430430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:42,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119101258] [2024-11-09 04:36:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:42,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:42,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:42,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:42,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:36:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:42,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 04:36:42,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:43,100 INFO L378 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 17 treesize of output 13 [2024-11-09 04:36:43,355 INFO L378 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 30 treesize of output 12 [2024-11-09 04:36:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:36:43,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:43,588 INFO L378 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 38 treesize of output 32 [2024-11-09 04:36:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 04:36:43,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119101258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867512764] [2024-11-09 04:36:43,649 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:36:43,649 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:43,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:43,650 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:43,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:44,793 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:36:44,813 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:49,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7476#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_76| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_83| Int)) (and (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_76|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_83|)) (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_76|)) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_83|) 1) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_83|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_76|)) 2147483648)) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_83|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_76|)) 2147483647))) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:36:49,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:49,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:49,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 29 [2024-11-09 04:36:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704314701] [2024-11-09 04:36:49,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:49,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 04:36:49,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 04:36:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2590, Unknown=1, NotChecked=0, Total=2756 [2024-11-09 04:36:49,104 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 29 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:36:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:50,084 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2024-11-09 04:36:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:36:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-09 04:36:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:50,085 INFO L225 Difference]: With dead ends: 78 [2024-11-09 04:36:50,085 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 04:36:50,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=293, Invalid=3738, Unknown=1, NotChecked=0, Total=4032 [2024-11-09 04:36:50,086 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 112 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:50,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 816 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:36:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 04:36:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2024-11-09 04:36:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.3) internal successors, (78), 71 states have internal predecessors, (78), 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) [2024-11-09 04:36:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2024-11-09 04:36:50,090 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 48 [2024-11-09 04:36:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:50,090 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2024-11-09 04:36:50,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:36:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2024-11-09 04:36:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 04:36:50,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:50,091 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:50,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 04:36:50,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 04:36:50,295 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:50,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1818293360, now seen corresponding path program 1 times [2024-11-09 04:36:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:50,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123700270] [2024-11-09 04:36:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:50,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 04:36:50,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:50,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123700270] [2024-11-09 04:36:50,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123700270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:50,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:50,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:36:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629163480] [2024-11-09 04:36:50,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:50,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:36:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:36:50,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:36:50,494 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:50,793 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-11-09 04:36:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:36:50,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2024-11-09 04:36:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:50,794 INFO L225 Difference]: With dead ends: 89 [2024-11-09 04:36:50,794 INFO L226 Difference]: Without dead ends: 89 [2024-11-09 04:36:50,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:36:50,795 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:50,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 219 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:36:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-09 04:36:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2024-11-09 04:36:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.323076923076923) internal successors, (86), 75 states have internal predecessors, (86), 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) [2024-11-09 04:36:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2024-11-09 04:36:50,803 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 50 [2024-11-09 04:36:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:50,803 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2024-11-09 04:36:50,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2024-11-09 04:36:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 04:36:50,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:50,806 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:50,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-09 04:36:50,806 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:50,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:50,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1818293359, now seen corresponding path program 1 times [2024-11-09 04:36:50,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:50,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169134137] [2024-11-09 04:36:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:50,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:36:51,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169134137] [2024-11-09 04:36:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169134137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:51,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:51,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:36:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520683258] [2024-11-09 04:36:51,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:51,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:36:51,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:36:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:36:51,159 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:51,392 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-11-09 04:36:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:36:51,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2024-11-09 04:36:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:51,394 INFO L225 Difference]: With dead ends: 77 [2024-11-09 04:36:51,394 INFO L226 Difference]: Without dead ends: 77 [2024-11-09 04:36:51,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:36:51,394 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 18 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:51,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 248 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-09 04:36:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-09 04:36:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 73 states have internal predecessors, (83), 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) [2024-11-09 04:36:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2024-11-09 04:36:51,398 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 50 [2024-11-09 04:36:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:51,398 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2024-11-09 04:36:51,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2024-11-09 04:36:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:36:51,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:51,399 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:51,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-09 04:36:51,400 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:51,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -532485430, now seen corresponding path program 1 times [2024-11-09 04:36:51,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:51,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511684252] [2024-11-09 04:36:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:51,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:36:51,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:51,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511684252] [2024-11-09 04:36:51,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511684252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:51,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:51,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:36:51,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194581414] [2024-11-09 04:36:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:51,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:36:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:36:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:36:51,586 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:51,782 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2024-11-09 04:36:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:36:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2024-11-09 04:36:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:51,783 INFO L225 Difference]: With dead ends: 77 [2024-11-09 04:36:51,784 INFO L226 Difference]: Without dead ends: 77 [2024-11-09 04:36:51,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:36:51,784 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:51,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 251 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:36:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-09 04:36:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-09 04:36:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 73 states have internal predecessors, (82), 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) [2024-11-09 04:36:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2024-11-09 04:36:51,788 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 51 [2024-11-09 04:36:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:51,788 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2024-11-09 04:36:51,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:36:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2024-11-09 04:36:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:36:51,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:51,789 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:51,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-09 04:36:51,790 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:51,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:51,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1432858987, now seen corresponding path program 2 times [2024-11-09 04:36:51,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:51,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206082194] [2024-11-09 04:36:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:51,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 04:36:51,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:51,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206082194] [2024-11-09 04:36:51,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206082194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:51,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183153133] [2024-11-09 04:36:51,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:36:51,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:51,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:51,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:51,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:36:52,224 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 04:36:52,224 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:36:52,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:36:52,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 04:36:52,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:36:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 04:36:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183153133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733053027] [2024-11-09 04:36:52,363 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:36:52,363 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:52,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:52,363 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:52,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:53,290 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:36:53,310 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:56,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8485#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_93| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_86| Int)) (and (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_86|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_93|)) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_93|) 1) (<= 0 (+ 2147483648 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_93|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_86|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_93|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_86|)) 2147483647) (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_86|)))) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-09 04:36:56,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:56,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2024-11-09 04:36:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364008338] [2024-11-09 04:36:56,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:56,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:36:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:36:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=804, Unknown=1, NotChecked=0, Total=930 [2024-11-09 04:36:56,327 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:36:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:56,492 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-11-09 04:36:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:36:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-09 04:36:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:56,493 INFO L225 Difference]: With dead ends: 69 [2024-11-09 04:36:56,493 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 04:36:56,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=155, Invalid=966, Unknown=1, NotChecked=0, Total=1122 [2024-11-09 04:36:56,494 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:56,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 148 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:36:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 04:36:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-09 04:36:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 65 states have internal predecessors, (72), 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) [2024-11-09 04:36:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-09 04:36:56,497 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 51 [2024-11-09 04:36:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:56,498 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-09 04:36:56,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:36:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-09 04:36:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:36:56,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:56,499 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:56,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 04:36:56,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 04:36:56,700 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:36:56,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:56,700 INFO L85 PathProgramCache]: Analyzing trace with hash -647723076, now seen corresponding path program 1 times [2024-11-09 04:36:56,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:56,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257776983] [2024-11-09 04:36:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:36:56,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:56,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257776983] [2024-11-09 04:36:56,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257776983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326159644] [2024-11-09 04:36:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:56,912 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:56,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:36:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:57,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-09 04:36:57,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:57,166 INFO L378 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 [2024-11-09 04:36:57,300 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:36:57,300 INFO L378 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 [2024-11-09 04:36:57,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:36:57,391 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:36:57,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:36:57,544 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:36:57,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:36:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:36:57,619 INFO L378 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 37 treesize of output 17 [2024-11-09 04:36:57,726 INFO L378 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 25 treesize of output 13 [2024-11-09 04:36:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 04:36:57,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:00,684 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2092 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2092) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2024-11-09 04:37:00,859 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-09 04:37:00,859 INFO L378 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 29 treesize of output 28 [2024-11-09 04:37:00,867 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2092 (Array Int Int)) (v_ArrVal_2091 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2091))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2092)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|)) is different from false [2024-11-09 04:37:00,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:00,881 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2024-11-09 04:37:00,889 INFO L378 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 236 treesize of output 200 [2024-11-09 04:37:00,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 143 [2024-11-09 04:37:00,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 135 [2024-11-09 04:37:01,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326159644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294086382] [2024-11-09 04:37:01,080 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2024-11-09 04:37:01,081 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:01,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:01,081 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:01,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:02,130 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:37:02,146 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:37:07,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8951#(and (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) (<= 4 (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_102| Int)) (and (<= 0 (+ 2147483648 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_102|) 4))) (<= 8 (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_102|)) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_102|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_102|) 4) 3))) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 1) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0)) 1)) (= |ULTIMATE.start_main_~len~0#1| 2))' at error location [2024-11-09 04:37:07,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:37:07,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:37:07,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17] total 21 [2024-11-09 04:37:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942165466] [2024-11-09 04:37:07,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:07,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 04:37:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 04:37:07,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2784, Unknown=28, NotChecked=214, Total=3192 [2024-11-09 04:37:07,174 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 22 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:37:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:07,800 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-11-09 04:37:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:37:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-09 04:37:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:07,801 INFO L225 Difference]: With dead ends: 75 [2024-11-09 04:37:07,801 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 04:37:07,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=191, Invalid=3327, Unknown=30, NotChecked=234, Total=3782 [2024-11-09 04:37:07,802 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:07,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 430 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:37:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 04:37:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2024-11-09 04:37:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 65 states have internal predecessors, (73), 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) [2024-11-09 04:37:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-09 04:37:07,805 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 53 [2024-11-09 04:37:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:07,806 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-09 04:37:07,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:37:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-09 04:37:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:37:07,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:07,807 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:07,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 04:37:08,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 04:37:08,008 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:37:08,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash -647723075, now seen corresponding path program 1 times [2024-11-09 04:37:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:08,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755443673] [2024-11-09 04:37:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:37:09,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755443673] [2024-11-09 04:37:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755443673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019906095] [2024-11-09 04:37:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:09,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:09,558 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:09,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 04:37:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:09,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 04:37:09,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:09,832 INFO L378 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 8 treesize of output 1 [2024-11-09 04:37:09,838 INFO L378 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 [2024-11-09 04:37:10,280 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:37:10,280 INFO L378 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 14 treesize of output 13 [2024-11-09 04:37:10,303 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:37:10,303 INFO L378 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 [2024-11-09 04:37:10,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:37:10,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:37:10,563 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-09 04:37:10,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2024-11-09 04:37:10,568 INFO L378 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 24 treesize of output 11 [2024-11-09 04:37:10,905 INFO L349 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2024-11-09 04:37:10,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2024-11-09 04:37:10,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:37:10,915 INFO L378 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 24 treesize of output 11 [2024-11-09 04:37:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:11,114 INFO L378 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 11 [2024-11-09 04:37:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:11,123 INFO L378 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 37 treesize of output 17 [2024-11-09 04:37:11,393 INFO L378 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 25 treesize of output 13 [2024-11-09 04:37:11,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-09 04:37:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 04:37:11,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:12,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:12,780 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2024-11-09 04:37:12,790 INFO L378 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 71 treesize of output 63 [2024-11-09 04:37:12,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2024-11-09 04:37:12,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2024-11-09 04:37:12,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:12,881 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 113 [2024-11-09 04:37:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:12,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:12,899 INFO L378 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 41 [2024-11-09 04:37:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:12,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-09 04:37:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:12,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-09 04:37:13,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019906095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:13,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135319645] [2024-11-09 04:37:13,280 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2024-11-09 04:37:13,280 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:13,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:13,280 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:13,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:14,151 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:37:14,171 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:37:20,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9456#(and (<= 1 |#StackHeapBarrier|) (<= 4 (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 1) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (or (< (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0) 0) (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0) 4))) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_111| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_104| Int)) (and (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_111|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_104|)) 2147483648)) (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_104|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_111|)) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_111|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_111|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_104|)) 3) (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_104|)))))' at error location [2024-11-09 04:37:20,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:37:20,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:37:20,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 40 [2024-11-09 04:37:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476326162] [2024-11-09 04:37:20,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:20,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:37:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:37:20,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=6176, Unknown=9, NotChecked=0, Total=6480 [2024-11-09 04:37:20,695 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 41 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:37:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:21,733 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2024-11-09 04:37:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:37:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2024-11-09 04:37:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:21,734 INFO L225 Difference]: With dead ends: 70 [2024-11-09 04:37:21,734 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 04:37:21,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=351, Invalid=7122, Unknown=9, NotChecked=0, Total=7482 [2024-11-09 04:37:21,735 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:21,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 649 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:37:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 04:37:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-09 04:37:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 66 states have internal predecessors, (73), 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) [2024-11-09 04:37:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-11-09 04:37:21,738 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 53 [2024-11-09 04:37:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:21,738 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-11-09 04:37:21,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:37:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-11-09 04:37:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:37:21,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:21,739 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:21,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:21,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:21,940 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:37:21,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash -647706260, now seen corresponding path program 1 times [2024-11-09 04:37:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:21,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834000757] [2024-11-09 04:37:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 04:37:22,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834000757] [2024-11-09 04:37:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834000757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:37:22,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:37:22,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:37:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019332009] [2024-11-09 04:37:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:37:22,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:37:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:37:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:37:22,161 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:22,427 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2024-11-09 04:37:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:37:22,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2024-11-09 04:37:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:22,429 INFO L225 Difference]: With dead ends: 69 [2024-11-09 04:37:22,429 INFO L226 Difference]: Without dead ends: 69 [2024-11-09 04:37:22,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:37:22,430 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:22,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 190 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:37:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-09 04:37:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-09 04:37:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 65 states have internal predecessors, (71), 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) [2024-11-09 04:37:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2024-11-09 04:37:22,433 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 53 [2024-11-09 04:37:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:22,434 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2024-11-09 04:37:22,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 04:37:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2024-11-09 04:37:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 04:37:22,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:22,435 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:22,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-09 04:37:22,435 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:37:22,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 308446396, now seen corresponding path program 1 times [2024-11-09 04:37:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:22,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699246193] [2024-11-09 04:37:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:37:23,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:23,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699246193] [2024-11-09 04:37:23,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699246193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:23,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218089574] [2024-11-09 04:37:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:23,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:23,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:23,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:23,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:37:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:24,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 04:37:24,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:24,100 INFO L378 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 [2024-11-09 04:37:24,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:37:24,387 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:37:24,388 INFO L378 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 [2024-11-09 04:37:24,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:37:24,695 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:37:24,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:37:25,053 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:37:25,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:37:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:25,174 INFO L378 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 37 treesize of output 17 [2024-11-09 04:37:25,385 INFO L378 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 25 treesize of output 13 [2024-11-09 04:37:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 04:37:25,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:26,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:26,363 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2024-11-09 04:37:26,367 INFO L378 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 136 treesize of output 112 [2024-11-09 04:37:26,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-11-09 04:37:26,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2024-11-09 04:37:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218089574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:26,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123761001] [2024-11-09 04:37:26,666 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:37:26,666 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:26,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:26,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:26,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:27,689 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:37:27,708 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:37:34,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10110#(and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0)) 0) |ULTIMATE.start_sll_circular_destroy_~q~0#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 4 (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (<= |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0)) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 1) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_120| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_113| Int)) (and (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_113|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_120|)) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_120|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_120|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_113|)) 3) (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_113|)) (<= 0 (+ 2147483648 (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_120|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_113|)))))) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0)) 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0)) 0) |ULTIMATE.start_sll_circular_destroy_~q~0#1.base|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0) |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0) 0) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0))))' at error location [2024-11-09 04:37:34,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:37:34,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:37:34,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 32 [2024-11-09 04:37:34,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185378566] [2024-11-09 04:37:34,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:34,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 04:37:34,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 04:37:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=5280, Unknown=4, NotChecked=0, Total=5550 [2024-11-09 04:37:34,351 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 33 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:35,626 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2024-11-09 04:37:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 04:37:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2024-11-09 04:37:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:35,628 INFO L225 Difference]: With dead ends: 70 [2024-11-09 04:37:35,628 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 04:37:35,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=334, Invalid=6634, Unknown=4, NotChecked=0, Total=6972 [2024-11-09 04:37:35,629 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:35,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 579 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:37:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 04:37:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-09 04:37:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.180327868852459) internal successors, (72), 66 states have internal predecessors, (72), 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) [2024-11-09 04:37:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2024-11-09 04:37:35,633 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 55 [2024-11-09 04:37:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:35,634 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2024-11-09 04:37:35,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:37:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2024-11-09 04:37:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 04:37:35,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:35,635 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:35,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:35,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:35,836 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:37:35,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1471035241, now seen corresponding path program 1 times [2024-11-09 04:37:35,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:35,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78913098] [2024-11-09 04:37:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:37:36,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78913098] [2024-11-09 04:37:36,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78913098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565137161] [2024-11-09 04:37:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:36,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:36,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:36,814 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 04:37:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:37,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-09 04:37:37,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:37,114 INFO L378 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 [2024-11-09 04:37:37,202 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:37:37,202 INFO L378 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 [2024-11-09 04:37:37,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:37:37,357 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:37:37,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-11-09 04:37:37,496 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:37:37,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-11-09 04:37:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:37,565 INFO L378 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 28 treesize of output 12 [2024-11-09 04:37:37,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:37,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2024-11-09 04:37:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:37:37,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:37:38,411 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| Int) (v_ArrVal_2488 (Array Int Int)) (v_ArrVal_2489 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| |c_ULTIMATE.start_main_~s~0#1.offset|) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2488) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| 4) v_ArrVal_2489) 0))))) is different from false [2024-11-09 04:37:38,435 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| Int) (v_ArrVal_2488 (Array Int Int)) (v_ArrVal_2487 (Array Int Int)) (v_ArrVal_2489 Int)) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2487))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2488)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| 4) v_ArrVal_2489) 0))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2024-11-09 04:37:38,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:38,465 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2024-11-09 04:37:38,472 INFO L378 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 161 treesize of output 149 [2024-11-09 04:37:38,478 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:38,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-09 04:37:38,487 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:38,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:38,502 INFO L378 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 70 treesize of output 70 [2024-11-09 04:37:38,508 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:37:38,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:38,524 INFO L378 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 52 treesize of output 55 [2024-11-09 04:37:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2024-11-09 04:37:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565137161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:37:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1817914477] [2024-11-09 04:37:39,513 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 04:37:39,513 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:37:39,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:37:39,513 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:37:39,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:37:40,387 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:37:40,402 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:37:52,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10675#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (exists ((|v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24| Int) (|v_#valid_266| (Array Int Int)) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_129| Int)) (and (= (select |v_#valid_266| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_129|) 1) (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_129|) 4) 3) (<= 8 (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_129|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_129|) 4) 2147483648)) (= (select |v_#valid_266| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24|) 1) (<= (+ |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24| 1) |#StackHeapBarrier|) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24|) 0) |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24|) (= (store |v_#valid_266| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24| 0) |#valid|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_24| 0)))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 04:37:52,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:37:52,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:37:52,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 46 [2024-11-09 04:37:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531783977] [2024-11-09 04:37:52,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:37:52,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 04:37:52,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:37:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 04:37:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=5427, Unknown=29, NotChecked=298, Total=6006 [2024-11-09 04:37:52,308 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 46 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 39 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:37:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:37:53,992 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2024-11-09 04:37:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 04:37:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 39 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2024-11-09 04:37:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:37:53,994 INFO L225 Difference]: With dead ends: 68 [2024-11-09 04:37:53,994 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 04:37:53,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=295, Invalid=6490, Unknown=29, NotChecked=326, Total=7140 [2024-11-09 04:37:53,995 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:37:53,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 637 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 830 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2024-11-09 04:37:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 04:37:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-11-09 04:37:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 63 states have internal predecessors, (67), 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) [2024-11-09 04:37:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-09 04:37:53,999 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 56 [2024-11-09 04:37:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:37:53,999 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-09 04:37:54,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 39 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-09 04:37:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-09 04:37:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 04:37:54,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:37:54,001 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:37:54,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 04:37:54,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:54,202 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:37:54,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:37:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1612956848, now seen corresponding path program 1 times [2024-11-09 04:37:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:37:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240462903] [2024-11-09 04:37:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:37:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:37:56,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:37:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240462903] [2024-11-09 04:37:56,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240462903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:37:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712030141] [2024-11-09 04:37:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:37:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:37:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:37:56,086 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:37:56,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 04:37:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:37:56,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-09 04:37:56,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:37:56,419 INFO L378 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 [2024-11-09 04:37:56,624 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:37:56,624 INFO L378 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 [2024-11-09 04:37:56,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:37:56,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-11-09 04:37:56,888 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-09 04:37:56,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2024-11-09 04:37:56,893 INFO L378 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 22 [2024-11-09 04:37:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:57,282 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 04:37:57,283 INFO L378 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 66 [2024-11-09 04:37:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:57,296 INFO L378 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 0 case distinctions, treesize of input 50 treesize of output 25 [2024-11-09 04:37:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:37:57,474 INFO L349 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2024-11-09 04:37:57,474 INFO L378 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 50 treesize of output 32 [2024-11-09 04:37:57,482 INFO L378 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 0 case distinctions, treesize of input 27 treesize of output 20 [2024-11-09 04:37:57,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:37:57,983 INFO L349 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2024-11-09 04:37:57,983 INFO L378 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2024-11-09 04:37:57,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:37:57,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-09 04:37:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:37:58,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:38:04,568 INFO L349 Elim1Store]: treesize reduction 1150, result has 26.5 percent of original size [2024-11-09 04:38:04,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 9304 treesize of output 9188 [2024-11-09 04:38:04,647 INFO L378 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 4297 treesize of output 4281 [2024-11-09 04:38:05,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:05,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1495 treesize of output 1495 [2024-11-09 04:38:05,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 616 treesize of output 608 [2024-11-09 04:38:07,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-09 04:38:07,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:07,491 INFO L378 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 70 treesize of output 74 [2024-11-09 04:38:08,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-09 04:38:09,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2024-11-09 04:38:09,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:38:09,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:09,409 INFO L378 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 19 treesize of output 23 [2024-11-09 04:38:09,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 117 [2024-11-09 04:38:10,420 INFO L349 Elim1Store]: treesize reduction 32, result has 59.5 percent of original size [2024-11-09 04:38:10,420 INFO L378 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 430 treesize of output 439 [2024-11-09 04:38:12,691 INFO L349 Elim1Store]: treesize reduction 32, result has 59.5 percent of original size [2024-11-09 04:38:12,692 INFO L378 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 424 treesize of output 451 [2024-11-09 04:38:13,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:13,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 185 [2024-11-09 04:38:14,009 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-09 04:38:14,143 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-09 04:38:14,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 123 [2024-11-09 04:38:14,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:14,258 INFO L378 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 28 treesize of output 32 [2024-11-09 04:38:14,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:38:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:14,314 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:14,315 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:14,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 145 [2024-11-09 04:38:14,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:14,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 85 [2024-11-09 04:38:14,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:38:14,655 INFO L349 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2024-11-09 04:38:14,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 78 [2024-11-09 04:38:14,704 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-09 04:38:14,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 89 [2024-11-09 04:38:14,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:38:14,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 201 treesize of output 207 [2024-11-09 04:38:15,542 INFO L349 Elim1Store]: treesize reduction 345, result has 0.3 percent of original size [2024-11-09 04:38:15,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 2923 treesize of output 1 [2024-11-09 04:38:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:15,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:15,624 INFO L349 Elim1Store]: treesize reduction 497, result has 23.3 percent of original size [2024-11-09 04:38:15,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 9284 treesize of output 8904 [2024-11-09 04:38:15,648 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:15,759 INFO L349 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2024-11-09 04:38:15,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 197 [2024-11-09 04:38:15,875 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-11-09 04:38:15,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 209 treesize of output 227 [2024-11-09 04:38:15,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 154 [2024-11-09 04:38:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:15,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:38:16,034 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:38:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:16,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-09 04:38:16,284 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:16,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2024-11-09 04:38:16,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:38:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:16,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-09 04:38:16,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2024-11-09 04:38:16,633 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:38:16,637 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:38:16,649 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 04:38:16,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 1 [2024-11-09 04:38:17,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712030141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:38:17,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962744706] [2024-11-09 04:38:17,394 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2024-11-09 04:38:17,394 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:38:17,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:38:17,394 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:38:17,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:38:18,464 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:38:18,480 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:38:30,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11216#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_43| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_43|) 1))) (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2))' at error location [2024-11-09 04:38:30,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:38:30,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:38:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2024-11-09 04:38:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701641619] [2024-11-09 04:38:30,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:38:30,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 04:38:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:38:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 04:38:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=6492, Unknown=21, NotChecked=0, Total=6806 [2024-11-09 04:38:30,925 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 38 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:38:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:38:33,230 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-11-09 04:38:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:38:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-11-09 04:38:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:38:33,231 INFO L225 Difference]: With dead ends: 59 [2024-11-09 04:38:33,231 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 04:38:33,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=387, Invalid=7964, Unknown=21, NotChecked=0, Total=8372 [2024-11-09 04:38:33,232 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:38:33,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 600 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:38:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 04:38:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 04:38:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 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) [2024-11-09 04:38:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-11-09 04:38:33,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 59 [2024-11-09 04:38:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:38:33,235 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-11-09 04:38:33,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 04:38:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-11-09 04:38:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 04:38:33,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:38:33,236 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:38:33,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 04:38:33,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:38:33,436 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:38:33,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:38:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1537423801, now seen corresponding path program 1 times [2024-11-09 04:38:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:38:33,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280816213] [2024-11-09 04:38:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:33,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:38:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:38:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 04:38:34,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:38:34,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280816213] [2024-11-09 04:38:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280816213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:38:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828019784] [2024-11-09 04:38:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:38:34,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:38:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:38:34,570 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:38:34,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 04:38:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:38:34,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:38:34,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:38:35,158 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:38:35,158 INFO L378 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 14 treesize of output 13 [2024-11-09 04:38:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:38:35,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:38:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 04:38:35,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828019784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:38:35,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225863039] [2024-11-09 04:38:35,584 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2024-11-09 04:38:35,584 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:38:35,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:38:35,585 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:38:35,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:38:36,651 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:38:36,665 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:39:49,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11769#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_circular_destroy_~head#1.base_26| Int)) (and (<= (+ |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_26| 1) |#StackHeapBarrier|) (not (= |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_26| 0)) (not (= (select |#valid| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_26|) 1)))) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_49| Int) (|v_#valid_294| (Array Int Int))) (and (= (store |v_#valid_294| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_49| 0) |#valid|) (<= (+ |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_49| 1) |#StackHeapBarrier|) (or (= (select |v_#valid_294| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_49|) 1) (= |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_49| 0)))))' at error location [2024-11-09 04:39:49,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:39:49,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:39:49,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 7] total 31 [2024-11-09 04:39:49,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680796979] [2024-11-09 04:39:49,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:39:49,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 04:39:49,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:39:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 04:39:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=4033, Unknown=36, NotChecked=0, Total=4290 [2024-11-09 04:39:49,789 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 32 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:39:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:39:56,558 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2024-11-09 04:39:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:39:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-11-09 04:39:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:39:56,559 INFO L225 Difference]: With dead ends: 58 [2024-11-09 04:39:56,559 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 04:39:56,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 76.1s TimeCoverageRelationStatistics Valid=284, Invalid=4792, Unknown=36, NotChecked=0, Total=5112 [2024-11-09 04:39:56,560 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:39:56,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 369 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 04:39:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 04:39:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-09 04:39:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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) [2024-11-09 04:39:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2024-11-09 04:39:56,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 60 [2024-11-09 04:39:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:39:56,563 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2024-11-09 04:39:56,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 04:39:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2024-11-09 04:39:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-09 04:39:56,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:39:56,564 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:39:56,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 04:39:56,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 04:39:56,764 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-11-09 04:39:56,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:39:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 4482549, now seen corresponding path program 1 times [2024-11-09 04:39:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:39:56,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353106979] [2024-11-09 04:39:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:39:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:39:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:40:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:40:02,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:40:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353106979] [2024-11-09 04:40:02,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353106979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:40:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988886166] [2024-11-09 04:40:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:40:02,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:40:02,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:40:02,764 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:40:02,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 04:40:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:40:03,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-09 04:40:03,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:40:05,799 INFO L378 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 [2024-11-09 04:40:06,394 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:40:06,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2024-11-09 04:40:08,245 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 04:40:08,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2024-11-09 04:40:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:40:08,929 INFO L378 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 42 treesize of output 22 [2024-11-09 04:40:10,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:40:10,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 04:40:11,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 42 treesize of output 53 [2024-11-09 04:40:13,686 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_51| Int) (|v_ULTIMATE.start_sll_circular_destroy_~head#1.base_27| Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_51| 0) |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_27| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_51| 1) |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_27|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_51|) 0))) is different from true [2024-11-09 04:40:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 04:40:13,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:40:16,174 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2832 Int)) (= (store (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4) v_ArrVal_2832)) |c_ULTIMATE.start_main_~s~0#1.base|) 0) 0) |c_ULTIMATE.start_main_~s~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2024-11-09 04:40:16,264 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| Int) (v_ArrVal_2832 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| |c_ULTIMATE.start_main_~s~0#1.offset|) (= (store (store |c_#valid| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| 4) v_ArrVal_2832) 0) 0) |c_ULTIMATE.start_main_~s~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-09 04:40:16,372 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2831 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| Int) (v_ArrVal_2832 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| |c_ULTIMATE.start_main_~s~0#1.offset|) (= (store (store |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2831) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| 4) v_ArrVal_2832) 0) 0) |c_ULTIMATE.start_main_~s~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-09 04:40:16,481 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2831 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| Int) (v_ArrVal_2832 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| |c_ULTIMATE.start_main_~s~0#1.offset|) (= (store (store |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_2831) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| 4) v_ArrVal_2832) 0) 0) |c_ULTIMATE.start_main_~s~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-09 04:40:16,659 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2831 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| Int) (v_ArrVal_2832 Int)) (or (= (store (store |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2831) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| 4) v_ArrVal_2832) 0) 0) |c_ULTIMATE.start_main_~s~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2024-11-09 04:40:16,768 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2831 (Array Int Int)) (v_ArrVal_2830 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| Int) (v_ArrVal_2832 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= (store (store |c_#valid| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2830))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2831)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_266| 4) v_ArrVal_2832) 0) 0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-09 04:40:16,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:40:16,870 INFO L378 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2024-11-09 04:40:16,886 INFO L378 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 196 treesize of output 184 [2024-11-09 04:40:16,900 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:40:16,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104 [2024-11-09 04:40:16,922 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:40:16,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:40:16,989 INFO L378 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 54 treesize of output 54 [2024-11-09 04:40:17,003 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:40:17,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:40:17,069 INFO L378 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 46 treesize of output 49 [2024-11-09 04:40:22,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988886166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:40:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520406284] [2024-11-09 04:40:22,574 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2024-11-09 04:40:22,574 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:40:22,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:40:22,575 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:40:22,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:40:24,430 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 6 for LOIs [2024-11-09 04:40:24,469 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:42:12,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12309#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (exists ((|v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30| Int) (|v_#valid_313| (Array Int Int))) (and (= (store |v_#valid_313| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30| 0) |#valid|) (<= (+ |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30| 1) |#StackHeapBarrier|) (or (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30|) 0) |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30|) 0) 0) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_153| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_146| Int)) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_153|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_146|)) 3) (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_146|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_153|)) (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_146|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_153|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_146|)) 2147483648)) (= (select |v_#valid_313| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_153|) 1))) (not (= |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30| 0)) (<= 4 (select |#length| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30|))) (exists ((|v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_59| Int) (|v_#valid_312| (Array Int Int))) (and (<= (+ |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_59| 1) |#StackHeapBarrier|) (= |v_#valid_313| (store |v_#valid_312| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_59| 0)) (or (= |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_59| 0) (= (select |v_#valid_312| |v_ULTIMATE.start_sll_circular_destroy_~p~0#1.base_59|) 1))))) (or (= |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30| 0) (= (select |v_#valid_313| |v_ULTIMATE.start_sll_circular_destroy_~head#1.base_30|) 1)))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-09 04:42:12,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:42:12,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:42:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2024-11-09 04:42:12,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541731184] [2024-11-09 04:42:12,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 04:42:12,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 04:42:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:42:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 04:42:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=6200, Unknown=45, NotChecked=1148, Total=7656 [2024-11-09 04:42:12,942 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 40 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 34 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:42:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:42:33,097 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-09 04:42:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:42:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 34 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2024-11-09 04:42:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:42:33,098 INFO L225 Difference]: With dead ends: 57 [2024-11-09 04:42:33,098 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 04:42:33,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 134.5s TimeCoverageRelationStatistics Valid=349, Invalid=8189, Unknown=46, NotChecked=1316, Total=9900 [2024-11-09 04:42:33,100 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:42:33,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 503 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 952 Invalid, 3 Unknown, 48 Unchecked, 10.1s Time] [2024-11-09 04:42:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 04:42:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 04:42:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:42:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 04:42:33,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2024-11-09 04:42:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:42:33,101 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 04:42:33,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 34 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 04:42:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 04:42:33,102 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 04:42:33,105 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 28 remaining) [2024-11-09 04:42:33,106 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 28 remaining) [2024-11-09 04:42:33,107 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 28 remaining) [2024-11-09 04:42:33,107 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 28 remaining) [2024-11-09 04:42:33,107 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 28 remaining) [2024-11-09 04:42:33,107 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 28 remaining) [2024-11-09 04:42:33,107 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 28 remaining) [2024-11-09 04:42:33,108 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 28 remaining) [2024-11-09 04:42:33,108 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 28 remaining) [2024-11-09 04:42:33,108 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 28 remaining) [2024-11-09 04:42:33,108 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 28 remaining) [2024-11-09 04:42:33,109 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 28 remaining) [2024-11-09 04:42:33,109 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 28 remaining) [2024-11-09 04:42:33,109 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 28 remaining) [2024-11-09 04:42:33,109 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 28 remaining) [2024-11-09 04:42:33,110 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 28 remaining) [2024-11-09 04:42:33,110 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (11 of 28 remaining) [2024-11-09 04:42:33,110 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (10 of 28 remaining) [2024-11-09 04:42:33,110 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (9 of 28 remaining) [2024-11-09 04:42:33,110 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (8 of 28 remaining) [2024-11-09 04:42:33,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (7 of 28 remaining) [2024-11-09 04:42:33,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (6 of 28 remaining) [2024-11-09 04:42:33,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK (5 of 28 remaining) [2024-11-09 04:42:33,111 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (4 of 28 remaining) [2024-11-09 04:42:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 28 remaining) [2024-11-09 04:42:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 28 remaining) [2024-11-09 04:42:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 28 remaining) [2024-11-09 04:42:33,112 INFO L782 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 28 remaining) [2024-11-09 04:42:33,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 04:42:33,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 04:42:33,319 INFO L407 BasicCegarLoop]: Path program histogram: [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] [2024-11-09 04:42:33,321 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 04:42:33,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:42:33 BoogieIcfgContainer [2024-11-09 04:42:33,325 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 04:42:33,326 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 04:42:33,326 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 04:42:33,326 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 04:42:33,327 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:30:31" (3/4) ... [2024-11-09 04:42:33,331 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 04:42:33,336 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2024-11-09 04:42:33,342 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2024-11-09 04:42:33,343 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2024-11-09 04:42:33,343 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 04:42:33,343 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 04:42:33,499 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 04:42:33,500 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 04:42:33,500 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 04:42:33,501 INFO L158 Benchmark]: Toolchain (without parser) took 722911.16ms. Allocated memory was 140.5MB in the beginning and 553.6MB in the end (delta: 413.1MB). Free memory was 102.6MB in the beginning and 500.6MB in the end (delta: -398.0MB). Peak memory consumption was 326.6MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,501 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 140.5MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:42:33,506 INFO L158 Benchmark]: CACSL2BoogieTranslator took 599.78ms. Allocated memory is still 140.5MB. Free memory was 102.6MB in the beginning and 82.1MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,506 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.19ms. Allocated memory is still 140.5MB. Free memory was 82.1MB in the beginning and 80.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,506 INFO L158 Benchmark]: Boogie Preprocessor took 33.08ms. Allocated memory is still 140.5MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,506 INFO L158 Benchmark]: RCFGBuilder took 659.65ms. Allocated memory is still 140.5MB. Free memory was 77.9MB in the beginning and 52.2MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,507 INFO L158 Benchmark]: TraceAbstraction took 721378.61ms. Allocated memory was 140.5MB in the beginning and 553.6MB in the end (delta: 413.1MB). Free memory was 51.2MB in the beginning and 200.9MB in the end (delta: -149.7MB). Peak memory consumption was 265.0MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,507 INFO L158 Benchmark]: Witness Printer took 173.83ms. Allocated memory is still 553.6MB. Free memory was 200.9MB in the beginning and 500.6MB in the end (delta: -299.7MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2024-11-09 04:42:33,508 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 140.5MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 599.78ms. Allocated memory is still 140.5MB. Free memory was 102.6MB in the beginning and 82.1MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.19ms. Allocated memory is still 140.5MB. Free memory was 82.1MB in the beginning and 80.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.08ms. Allocated memory is still 140.5MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 659.65ms. Allocated memory is still 140.5MB. Free memory was 77.9MB in the beginning and 52.2MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 721378.61ms. Allocated memory was 140.5MB in the beginning and 553.6MB in the end (delta: 413.1MB). Free memory was 51.2MB in the beginning and 200.9MB in the end (delta: -149.7MB). Peak memory consumption was 265.0MB. Max. memory is 16.1GB. * Witness Printer took 173.83ms. Allocated memory is still 553.6MB. Free memory was 200.9MB in the beginning and 500.6MB in the end (delta: -299.7MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 620]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 28 error locations. Started 1 CEGAR loops. OverallTime: 721.3s, OverallIterations: 36, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 140.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 mSolverCounterUnknown, 1799 SdHoareTripleChecker+Valid, 118.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1798 mSDsluCounter, 16054 SdHoareTripleChecker+Invalid, 111.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 521 IncrementalHoareTripleChecker+Unchecked, 14364 mSDsCounter, 140 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14043 IncrementalHoareTripleChecker+Invalid, 14751 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 140 mSolverCounterUnsat, 1690 mSDtfsCounter, 14043 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3299 GetRequests, 1887 SyntacticMatches, 54 SemanticMatches, 1358 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 21666 ImplicationChecksByTransitivity, 517.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=16, InterpolantAutomatonStates: 414, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 36 MinimizatonAttempts, 133 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 91.2s InterpolantComputationTime, 2338 NumberOfCodeBlocks, 2326 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 2781 ConstructedInterpolants, 60 QuantifiedInterpolants, 25289 SizeOfPredicates, 78 NumberOfNonLiveVariables, 7823 ConjunctsInSsa, 1106 ConjunctsInUnsatCore, 71 InterpolantComputations, 13 PerfectInterpolantSequences, 758/1139 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 32, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 64, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 8, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 66, TOOLS_QUANTIFIERELIM_TIME: 0.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 120, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 16, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 32, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 0.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1159, DAG_COMPRESSION_RETAINED_NODES: 95, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 28 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-09 04:42:33,735 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-09 04:42:33,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd100394-2b70-4204-92d3-436c727651a0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE