./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91 --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:57:43,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:57:43,561 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-24 23:57:43,567 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:57:43,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:57:43,597 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:57:43,598 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:57:43,598 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:57:43,599 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:57:43,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:57:43,601 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:57:43,602 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:57:43,602 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:57:43,603 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:57:43,604 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:57:43,604 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:57:43,605 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:57:43,606 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:57:43,607 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:57:43,607 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:57:43,608 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:57:43,609 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:57:43,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 23:57:43,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 23:57:43,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:57:43,612 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:57:43,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:57:43,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:57:43,614 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:57:43,614 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 23:57:43,615 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 23:57:43,615 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 23:57:43,616 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:57:43,616 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:57:43,616 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:57:43,616 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:57:43,617 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:57:43,617 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:57:43,617 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:57:43,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:57:43,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:57:43,619 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:57:43,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:57:43,619 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:57:43,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:57:43,620 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:57:43,620 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:57:43,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:57:43,621 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_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2023-11-24 23:57:43,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:57:44,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:57:44,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:57:44,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:57:44,027 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:57:44,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-24 23:57:47,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:57:47,505 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:57:47,506 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-24 23:57:47,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/data/68685df44/0a0791ef71074778bc2fd9524f77861f/FLAGad5b442c7 [2023-11-24 23:57:47,545 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/data/68685df44/0a0791ef71074778bc2fd9524f77861f [2023-11-24 23:57:47,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:57:47,553 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:57:47,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:57:47,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:57:47,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:57:47,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:57:47" (1/1) ... [2023-11-24 23:57:47,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d01014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:47, skipping insertion in model container [2023-11-24 23:57:47,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:57:47" (1/1) ... [2023-11-24 23:57:47,640 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:57:48,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:57:48,032 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:57:48,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:57:48,176 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:57:48,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48 WrapperNode [2023-11-24 23:57:48,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:57:48,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:57:48,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:57:48,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:57:48,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,270 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 127 [2023-11-24 23:57:48,273 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:57:48,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:57:48,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:57:48,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:57:48,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,322 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:57:48,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:57:48,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:57:48,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:57:48,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (1/1) ... [2023-11-24 23:57:48,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:57:48,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:48,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:57:48,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:57:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:57:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:57:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-24 23:57:48,446 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-24 23:57:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:57:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:57:48,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:57:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:57:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:57:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:57:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:57:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:57:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:57:48,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:57:48,593 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:57:48,595 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:57:48,992 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:57:49,077 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:57:49,077 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 23:57:49,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:57:49 BoogieIcfgContainer [2023-11-24 23:57:49,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:57:49,082 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:57:49,082 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:57:49,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:57:49,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:57:47" (1/3) ... [2023-11-24 23:57:49,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48391bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:57:49, skipping insertion in model container [2023-11-24 23:57:49,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:48" (2/3) ... [2023-11-24 23:57:49,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48391bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:57:49, skipping insertion in model container [2023-11-24 23:57:49,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:57:49" (3/3) ... [2023-11-24 23:57:49,088 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2023-11-24 23:57:49,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:57:49,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-24 23:57:49,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:57:49,156 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@324f397d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:57:49,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-24 23:57:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 34 states have (on average 2.176470588235294) internal successors, (74), 65 states have internal predecessors, (74), 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) [2023-11-24 23:57:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:57:49,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:49,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:57:49,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:57:49,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1486501759, now seen corresponding path program 1 times [2023-11-24 23:57:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:49,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71586566] [2023-11-24 23:57:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:49,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:49,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:49,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71586566] [2023-11-24 23:57:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71586566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:49,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:49,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:57:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383730941] [2023-11-24 23:57:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:57:49,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:57:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:49,646 INFO L87 Difference]: Start difference. First operand has 69 states, 34 states have (on average 2.176470588235294) internal successors, (74), 65 states have internal predecessors, (74), 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, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 23:57:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:49,749 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-24 23:57:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:57:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2023-11-24 23:57:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:49,762 INFO L225 Difference]: With dead ends: 74 [2023-11-24 23:57:49,762 INFO L226 Difference]: Without dead ends: 72 [2023-11-24 23:57:49,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:49,769 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:49,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:57:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-24 23:57:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2023-11-24 23:57:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 33 states have (on average 2.090909090909091) internal successors, (69), 63 states have internal predecessors, (69), 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) [2023-11-24 23:57:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-11-24 23:57:49,823 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 6 [2023-11-24 23:57:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:49,823 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-11-24 23:57:49,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 23:57:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-11-24 23:57:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:57:49,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:49,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:57:49,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:57:49,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:57:49,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1330367128, now seen corresponding path program 1 times [2023-11-24 23:57:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:49,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254389737] [2023-11-24 23:57:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:49,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254389737] [2023-11-24 23:57:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254389737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:49,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:49,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:57:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923677782] [2023-11-24 23:57:49,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:49,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:57:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:57:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:49,955 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-24 23:57:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:50,085 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-11-24 23:57:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:57:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-11-24 23:57:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:50,089 INFO L225 Difference]: With dead ends: 65 [2023-11-24 23:57:50,089 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 23:57:50,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:50,092 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:50,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:57:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 23:57:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-24 23:57:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 61 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) [2023-11-24 23:57:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-11-24 23:57:50,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 6 [2023-11-24 23:57:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:50,102 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-11-24 23:57:50,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-24 23:57:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-11-24 23:57:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:57:50,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:50,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:57:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:57:50,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:57:50,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1330367129, now seen corresponding path program 1 times [2023-11-24 23:57:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:50,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521451139] [2023-11-24 23:57:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:50,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:50,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521451139] [2023-11-24 23:57:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521451139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:50,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:50,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:57:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149002741] [2023-11-24 23:57:50,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:57:50,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:57:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:50,280 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-24 23:57:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:50,396 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2023-11-24 23:57:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:57:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-11-24 23:57:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:50,398 INFO L225 Difference]: With dead ends: 63 [2023-11-24 23:57:50,398 INFO L226 Difference]: Without dead ends: 63 [2023-11-24 23:57:50,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:57:50,401 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 87 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 [2023-11-24 23:57:50,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 87 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:57:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-24 23:57:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-24 23:57:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 59 states have internal predecessors, (65), 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) [2023-11-24 23:57:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-11-24 23:57:50,410 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 6 [2023-11-24 23:57:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:50,410 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-11-24 23:57:50,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-24 23:57:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-11-24 23:57:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:57:50,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:50,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:57:50,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:57:50,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:57:50,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -654861783, now seen corresponding path program 1 times [2023-11-24 23:57:50,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:50,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445441042] [2023-11-24 23:57:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:50,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:50,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:50,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445441042] [2023-11-24 23:57:50,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445441042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:50,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:57:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984408147] [2023-11-24 23:57:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:57:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:57:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:57:50,560 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2023-11-24 23:57:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:50,729 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2023-11-24 23:57:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:57:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2023-11-24 23:57:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:50,732 INFO L225 Difference]: With dead ends: 63 [2023-11-24 23:57:50,732 INFO L226 Difference]: Without dead ends: 63 [2023-11-24 23:57:50,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:50,734 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 5 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:50,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 175 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:57:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-24 23:57:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-11-24 23:57:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 58 states have internal predecessors, (64), 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) [2023-11-24 23:57:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-11-24 23:57:50,744 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 10 [2023-11-24 23:57:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:50,745 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-11-24 23:57:50,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2023-11-24 23:57:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-24 23:57:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:57:50,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:50,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:57:50,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:57:50,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:57:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash -654861782, now seen corresponding path program 1 times [2023-11-24 23:57:50,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:50,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76849055] [2023-11-24 23:57:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:50,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76849055] [2023-11-24 23:57:50,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76849055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:50,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:57:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418847639] [2023-11-24 23:57:50,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:50,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:57:50,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:57:50,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:57:50,951 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2023-11-24 23:57:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:51,161 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-11-24 23:57:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:57:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2023-11-24 23:57:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:51,164 INFO L225 Difference]: With dead ends: 62 [2023-11-24 23:57:51,164 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 23:57:51,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:57:51,165 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:51,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 238 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:57:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 23:57:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2023-11-24 23:57:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 57 states have internal predecessors, (63), 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) [2023-11-24 23:57:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-24 23:57:51,174 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 10 [2023-11-24 23:57:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:51,175 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-24 23:57:51,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2023-11-24 23:57:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-24 23:57:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:57:51,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:51,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:57:51,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:57:51,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:57:51,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash -114926607, now seen corresponding path program 1 times [2023-11-24 23:57:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711874680] [2023-11-24 23:57:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:57:51,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711874680] [2023-11-24 23:57:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711874680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70528296] [2023-11-24 23:57:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:51,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:51,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:51,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:51,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:57:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:51,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:57:51,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:57:51,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:57:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:57:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70528296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:57:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [970200427] [2023-11-24 23:57:51,625 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-24 23:57:51,626 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:57:51,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:57:51,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:57:51,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:57:54,214 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 123 for LOIs [2023-11-24 23:57:54,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:58:01,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '856#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (= |ULTIMATE.start_sll_insert_#in~index#1| 1) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (= |ULTIMATE.start_sll_insert_#in~data#1| 1) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~data#1| 1) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_insert_~index#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)) (or (and (exists ((|v_#memory_$Pointer$.offset_BEFORE_CALL_17| (Array Int (Array Int Int)))) (= (select (select |v_#memory_$Pointer$.offset_BEFORE_CALL_17| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_#length_67| (Array Int Int))) (= |#length| (store |v_#length_67| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 8))) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.base_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) |#memory_$Pointer$.base|)) (exists ((|v_#valid_82| (Array Int Int))) (and (= (store |v_#valid_82| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#valid|) (= (select |v_#valid_82| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) (exists ((|v_#memory_int_44| (Array Int (Array Int Int))) (|v_#memory_int_45| (Array Int (Array Int Int)))) (and (= |v_#memory_int_45| (store |v_#memory_int_44| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_44| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_45| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4)))) (= |#memory_int| (store |v_#memory_int_45| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_45| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0 1))))) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_10| (Array Int (Array Int Int)))) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_10| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|)) (exists ((|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))))) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|)) (and (exists ((|v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| (Array Int (Array Int Int)))) (= (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_#length_67| (Array Int Int))) (= |#length| (store |v_#length_67| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 8))) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_$Pointer$.base_63| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.base_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) |#memory_$Pointer$.base|)) (exists ((|v_#valid_82| (Array Int Int))) (and (= (store |v_#valid_82| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#valid|) (= (select |v_#valid_82| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) (exists ((|v_#memory_int_44| (Array Int (Array Int Int))) (|v_#memory_int_45| (Array Int (Array Int Int)))) (and (= |v_#memory_int_45| (store |v_#memory_int_44| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_44| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_45| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4)))) (= |#memory_int| (store |v_#memory_int_45| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_45| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0 1))))) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_63| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_63| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))))) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_9| (Array Int (Array Int Int)))) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_9| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|))))' at error location [2023-11-24 23:58:01,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:58:01,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:58:01,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-24 23:58:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949221548] [2023-11-24 23:58:01,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:58:01,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:58:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:58:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2023-11-24 23:58:01,858 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 23:58:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:01,908 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-11-24 23:58:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:58:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2023-11-24 23:58:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:01,910 INFO L225 Difference]: With dead ends: 65 [2023-11-24 23:58:01,910 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 23:58:01,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2023-11-24 23:58:01,912 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:01,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:58:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 23:58:01,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-24 23:58:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 60 states have internal predecessors, (66), 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) [2023-11-24 23:58:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-11-24 23:58:01,920 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 19 [2023-11-24 23:58:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:01,921 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-11-24 23:58:01,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 23:58:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-11-24 23:58:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 23:58:01,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:01,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:01,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:02,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:58:02,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1859508146, now seen corresponding path program 2 times [2023-11-24 23:58:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241215520] [2023-11-24 23:58:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:02,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:58:02,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241215520] [2023-11-24 23:58:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241215520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284908167] [2023-11-24 23:58:02,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:58:02,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:02,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:02,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:02,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:58:02,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:58:02,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:58:02,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 23:58:02,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:02,970 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 [2023-11-24 23:58:02,998 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 [2023-11-24 23:58:03,042 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 23:58:03,043 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 [2023-11-24 23:58:03,118 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 [2023-11-24 23:58:03,129 WARN L876 $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 [2023-11-24 23:58:03,149 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 23:58:03,150 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 [2023-11-24 23:58:03,210 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 [2023-11-24 23:58:03,221 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2023-11-24 23:58:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:03,247 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 [2023-11-24 23:58:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 12 not checked. [2023-11-24 23:58:03,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:58:03,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284908167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153728536] [2023-11-24 23:58:03,330 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-24 23:58:03,330 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:58:03,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:58:03,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:58:03,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:58:04,952 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 144 for LOIs [2023-11-24 23:58:05,576 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:58:14,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1106#(and (or (and (exists ((|v_#valid_95| (Array Int Int))) (and (= (select |v_#valid_95| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0) (= (store |v_#valid_95| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#valid|))) (exists ((|v_#length_74| (Array Int Int))) (= |#length| (store |v_#length_74| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 8))) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_21| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_79| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_79| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_79| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_sll_create_#res#1.base|) 4))) |v_old(#memory_$Pointer$.base)_AFTER_CALL_21|) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_21| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|))) (exists ((|v_old(#valid)_AFTER_CALL_21| (Array Int Int))) (= (select |v_old(#valid)_AFTER_CALL_21| |ULTIMATE.start_sll_create_#res#1.base|) 1)) (exists ((|v_#memory_$Pointer$.offset_75| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))))) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_#memory_int_60| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_21| (Array Int (Array Int Int)))) (= (store |v_#memory_int_60| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_int_60| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_int)_AFTER_CALL_21| |ULTIMATE.start_sll_create_#res#1.base|) 4))) |v_old(#memory_int)_AFTER_CALL_21|)) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_75| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.base_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_int_56| (Array Int (Array Int Int))) (|v_#memory_int_57| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_57| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_57| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0 1))) (= |v_#memory_int_57| (store |v_#memory_int_56| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_56| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_57| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4)))))) (exists ((|v_#memory_$Pointer$.offset_79| (Array Int (Array Int Int)))) (= (select (select (store |v_#memory_$Pointer$.offset_79| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_79| |ULTIMATE.start_sll_create_#res#1.base|) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|) (exists ((|v_#length_BEFORE_CALL_35| (Array Int Int))) (<= 8 (select |v_#length_BEFORE_CALL_35| |ULTIMATE.start_sll_create_#res#1.base|)))) (and (exists ((|v_#valid_95| (Array Int Int))) (and (= (select |v_#valid_95| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0) (= (store |v_#valid_95| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#valid|))) (exists ((|v_#length_74| (Array Int Int))) (= |#length| (store |v_#length_74| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 8))) (exists ((|v_#memory_$Pointer$.offset_75| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.offset_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))))) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_79| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_main_~#s~0#1.base|) 0) |ULTIMATE.start_sll_create_#res#1.base|) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| (store |v_#memory_$Pointer$.base_79| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_79| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_20| |ULTIMATE.start_sll_create_#res#1.base|) 4)))))) (exists ((|v_old(#length)_AFTER_CALL_20| (Array Int Int))) (<= 8 (select |v_old(#length)_AFTER_CALL_20| |ULTIMATE.start_sll_create_#res#1.base|))) (exists ((|v_old(#valid)_AFTER_CALL_20| (Array Int Int))) (= (select |v_old(#valid)_AFTER_CALL_20| |ULTIMATE.start_sll_create_#res#1.base|) 1)) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_75| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (store (select |v_#memory_$Pointer$.base_75| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 0) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) |#memory_$Pointer$.base|)) (exists ((|v_#memory_int_56| (Array Int (Array Int Int))) (|v_#memory_int_57| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_57| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_57| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0 1))) (= |v_#memory_int_57| (store |v_#memory_int_56| |ULTIMATE.start_sll_insert_~new_node~0#1.base| (store (select |v_#memory_int_56| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4 (select (select |v_#memory_int_57| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 4)))))) (exists ((|v_#memory_$Pointer$.offset_79| (Array Int (Array Int Int)))) (= (select (select (store |v_#memory_$Pointer$.offset_79| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_79| |ULTIMATE.start_sll_create_#res#1.base|) 4 0)) |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (exists ((|v_#memory_int_60| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_20| (Array Int (Array Int Int)))) (= |v_old(#memory_int)_AFTER_CALL_20| (store |v_#memory_int_60| |ULTIMATE.start_sll_create_#res#1.base| (store (select |v_#memory_int_60| |ULTIMATE.start_sll_create_#res#1.base|) 4 (select (select |v_old(#memory_int)_AFTER_CALL_20| |ULTIMATE.start_sll_create_#res#1.base|) 4))))) (= |ULTIMATE.start_sll_insert_#in~head#1.base| |ULTIMATE.start_sll_insert_~head#1.base|))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_#in~head#1.offset| 0) (= |ULTIMATE.start_sll_insert_#in~index#1| 1) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (= |ULTIMATE.start_sll_insert_#in~data#1| 1) (= |ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (= |ULTIMATE.start_sll_insert_~data#1| 1) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_insert_~index#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~head#1.base|) 1)))' at error location [2023-11-24 23:58:14,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:58:14,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:58:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2023-11-24 23:58:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656076236] [2023-11-24 23:58:14,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:58:14,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 23:58:14,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 23:58:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=664, Unknown=6, NotChecked=106, Total=870 [2023-11-24 23:58:14,338 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 17 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 23:58:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:14,772 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-11-24 23:58:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:58:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2023-11-24 23:58:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:14,773 INFO L225 Difference]: With dead ends: 71 [2023-11-24 23:58:14,774 INFO L226 Difference]: Without dead ends: 71 [2023-11-24 23:58:14,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=123, Invalid=809, Unknown=6, NotChecked=118, Total=1056 [2023-11-24 23:58:14,775 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 129 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:14,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 148 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2023-11-24 23:58:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-24 23:58:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2023-11-24 23:58:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 56 states have internal predecessors, (62), 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) [2023-11-24 23:58:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-11-24 23:58:14,781 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 28 [2023-11-24 23:58:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:14,782 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-11-24 23:58:14,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 23:58:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-11-24 23:58:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 23:58:14,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:14,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:14,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:14,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:14,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1859508147, now seen corresponding path program 1 times [2023-11-24 23:58:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810988433] [2023-11-24 23:58:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:58:15,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:15,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810988433] [2023-11-24 23:58:15,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810988433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:15,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244865418] [2023-11-24 23:58:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:15,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:15,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:15,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:58:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:16,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 23:58:16,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:16,033 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 [2023-11-24 23:58:16,071 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 [2023-11-24 23:58:16,079 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-24 23:58:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:16,104 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 [2023-11-24 23:58:16,132 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 [2023-11-24 23:58:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:16,172 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 [2023-11-24 23:58:16,248 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 [2023-11-24 23:58:16,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:16,282 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 [2023-11-24 23:58:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:58:16,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244865418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2023-11-24 23:58:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431151712] [2023-11-24 23:58:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:16,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:58:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:58:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=222, Unknown=1, NotChecked=30, Total=306 [2023-11-24 23:58:16,312 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-24 23:58:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:16,451 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2023-11-24 23:58:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:58:16,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 28 [2023-11-24 23:58:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:16,453 INFO L225 Difference]: With dead ends: 59 [2023-11-24 23:58:16,453 INFO L226 Difference]: Without dead ends: 59 [2023-11-24 23:58:16,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2023-11-24 23:58:16,455 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:16,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2023-11-24 23:58:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-24 23:58:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-24 23:58:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 54 states have internal predecessors, (60), 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) [2023-11-24 23:58:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2023-11-24 23:58:16,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2023-11-24 23:58:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:16,462 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2023-11-24 23:58:16,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-24 23:58:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2023-11-24 23:58:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:58:16,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:16,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:16,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:16,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:16,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 281067038, now seen corresponding path program 1 times [2023-11-24 23:58:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:16,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904318516] [2023-11-24 23:58:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:16,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:58:17,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:17,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904318516] [2023-11-24 23:58:17,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904318516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:17,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676453982] [2023-11-24 23:58:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:17,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:17,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:17,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:58:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:17,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-24 23:58:17,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:17,645 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 9 treesize of output 5 [2023-11-24 23:58:17,712 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2023-11-24 23:58:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:17,724 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 18 treesize of output 13 [2023-11-24 23:58:17,739 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-24 23:58:17,740 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 16 treesize of output 18 [2023-11-24 23:58:17,812 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 17 treesize of output 9 [2023-11-24 23:58:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 23:58:17,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:17,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676453982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:17,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:17,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2023-11-24 23:58:17,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133548857] [2023-11-24 23:58:17,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:17,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:58:17,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:17,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:58:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=326, Unknown=1, NotChecked=36, Total=420 [2023-11-24 23:58:17,842 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-11-24 23:58:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:18,223 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2023-11-24 23:58:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:58:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 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 30 [2023-11-24 23:58:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:18,224 INFO L225 Difference]: With dead ends: 70 [2023-11-24 23:58:18,224 INFO L226 Difference]: Without dead ends: 70 [2023-11-24 23:58:18,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=465, Unknown=1, NotChecked=44, Total=600 [2023-11-24 23:58:18,226 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 108 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:18,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 164 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2023-11-24 23:58:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-24 23:58:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2023-11-24 23:58:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 56 states have internal predecessors, (64), 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) [2023-11-24 23:58:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-11-24 23:58:18,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 30 [2023-11-24 23:58:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:18,232 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-11-24 23:58:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-11-24 23:58:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-11-24 23:58:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:58:18,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:18,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:18,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:18,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:18,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:18,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash 281067039, now seen corresponding path program 1 times [2023-11-24 23:58:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:18,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644362690] [2023-11-24 23:58:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:58:19,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644362690] [2023-11-24 23:58:19,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644362690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388940927] [2023-11-24 23:58:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:19,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:19,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:19,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:58:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:19,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-24 23:58:19,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:20,090 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 17 [2023-11-24 23:58:20,097 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 21 treesize of output 13 [2023-11-24 23:58:20,174 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-24 23:58:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:20,195 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 33 treesize of output 26 [2023-11-24 23:58:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:20,203 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 24 treesize of output 19 [2023-11-24 23:58:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:20,210 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 33 treesize of output 26 [2023-11-24 23:58:20,226 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 23:58:20,227 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 15 treesize of output 15 [2023-11-24 23:58:20,279 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 23 treesize of output 15 [2023-11-24 23:58:20,282 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 28 treesize of output 16 [2023-11-24 23:58:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 23:58:20,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388940927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:20,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:20,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 21 [2023-11-24 23:58:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990667340] [2023-11-24 23:58:20,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:58:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:58:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=368, Unknown=1, NotChecked=38, Total=462 [2023-11-24 23:58:20,325 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-11-24 23:58:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:20,796 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-11-24 23:58:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:58:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 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 30 [2023-11-24 23:58:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:20,797 INFO L225 Difference]: With dead ends: 69 [2023-11-24 23:58:20,797 INFO L226 Difference]: Without dead ends: 69 [2023-11-24 23:58:20,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=523, Unknown=1, NotChecked=46, Total=650 [2023-11-24 23:58:20,799 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 85 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:20,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 184 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2023-11-24 23:58:20,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-24 23:58:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2023-11-24 23:58:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 56 states have internal predecessors, (63), 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) [2023-11-24 23:58:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-11-24 23:58:20,813 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 30 [2023-11-24 23:58:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:20,816 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-11-24 23:58:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-11-24 23:58:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-11-24 23:58:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:58:20,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:20,819 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:20,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:58:21,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:21,021 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:21,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:21,021 INFO L85 PathProgramCache]: Analyzing trace with hash 123275542, now seen corresponding path program 1 times [2023-11-24 23:58:21,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:21,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361439867] [2023-11-24 23:58:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:21,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:58:21,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:21,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361439867] [2023-11-24 23:58:21,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361439867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:21,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:21,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:21,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013688461] [2023-11-24 23:58:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:21,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:58:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:58:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:21,094 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-24 23:58:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:21,140 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-11-24 23:58:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:58:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 31 [2023-11-24 23:58:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:21,141 INFO L225 Difference]: With dead ends: 65 [2023-11-24 23:58:21,142 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 23:58:21,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:58:21,143 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:21,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 83 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:58:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 23:58:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-11-24 23:58:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.641025641025641) internal successors, (64), 57 states have internal predecessors, (64), 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) [2023-11-24 23:58:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-11-24 23:58:21,148 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 31 [2023-11-24 23:58:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:21,149 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-11-24 23:58:21,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-24 23:58:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-11-24 23:58:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:58:21,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:21,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:58:21,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:21,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -473420505, now seen corresponding path program 1 times [2023-11-24 23:58:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:21,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263975235] [2023-11-24 23:58:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:21,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 23:58:21,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:21,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263975235] [2023-11-24 23:58:21,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263975235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:21,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:21,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:58:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268515840] [2023-11-24 23:58:21,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:21,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:58:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:58:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:58:21,300 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-24 23:58:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:21,421 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-11-24 23:58:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:58:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 32 [2023-11-24 23:58:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:21,422 INFO L225 Difference]: With dead ends: 61 [2023-11-24 23:58:21,422 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 23:58:21,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:58:21,423 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:21,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:58:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 23:58:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-24 23:58:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 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) [2023-11-24 23:58:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-11-24 23:58:21,428 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 32 [2023-11-24 23:58:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:21,429 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-11-24 23:58:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-24 23:58:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-11-24 23:58:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:58:21,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:21,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:21,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:58:21,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:21,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -473420504, now seen corresponding path program 1 times [2023-11-24 23:58:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:21,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162487617] [2023-11-24 23:58:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:58:21,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:21,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162487617] [2023-11-24 23:58:21,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162487617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:21,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:21,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:58:21,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85266379] [2023-11-24 23:58:21,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:21,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:58:21,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:21,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:58:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:58:21,553 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-11-24 23:58:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:21,606 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-11-24 23:58:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:58:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 32 [2023-11-24 23:58:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:21,608 INFO L225 Difference]: With dead ends: 60 [2023-11-24 23:58:21,609 INFO L226 Difference]: Without dead ends: 60 [2023-11-24 23:58:21,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:58:21,610 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:21,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:58:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-24 23:58:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-24 23:58:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 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) [2023-11-24 23:58:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-11-24 23:58:21,615 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 32 [2023-11-24 23:58:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:21,616 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-11-24 23:58:21,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-11-24 23:58:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-11-24 23:58:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:58:21,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:21,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:21,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:58:21,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:21,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -477400521, now seen corresponding path program 1 times [2023-11-24 23:58:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283554473] [2023-11-24 23:58:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:58:21,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283554473] [2023-11-24 23:58:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283554473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:21,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:58:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369428447] [2023-11-24 23:58:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:58:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:58:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:58:21,772 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-24 23:58:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:21,821 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-24 23:58:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:58:21,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 32 [2023-11-24 23:58:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:21,823 INFO L225 Difference]: With dead ends: 57 [2023-11-24 23:58:21,823 INFO L226 Difference]: Without dead ends: 57 [2023-11-24 23:58:21,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:58:21,824 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:21,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 77 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:58:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-24 23:58:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-24 23:58:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 52 states have internal predecessors, (57), 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) [2023-11-24 23:58:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-24 23:58:21,828 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 32 [2023-11-24 23:58:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:21,828 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-24 23:58:21,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-24 23:58:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-24 23:58:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 23:58:21,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:21,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:21,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:58:21,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:21,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:21,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1914382307, now seen corresponding path program 1 times [2023-11-24 23:58:21,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:21,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612767859] [2023-11-24 23:58:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:21,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:58:21,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:21,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612767859] [2023-11-24 23:58:21,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612767859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:21,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:21,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:58:21,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771214405] [2023-11-24 23:58:21,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:21,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:58:21,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:58:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:58:21,931 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2023-11-24 23:58:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:22,000 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-24 23:58:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:58:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 33 [2023-11-24 23:58:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:22,002 INFO L225 Difference]: With dead ends: 56 [2023-11-24 23:58:22,002 INFO L226 Difference]: Without dead ends: 56 [2023-11-24 23:58:22,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:58:22,003 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:22,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 88 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:58:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-24 23:58:22,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-24 23:58:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 51 states have internal predecessors, (56), 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) [2023-11-24 23:58:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-24 23:58:22,007 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 33 [2023-11-24 23:58:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:22,008 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-24 23:58:22,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2023-11-24 23:58:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-24 23:58:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 23:58:22,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:22,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:58:22,010 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:22,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1914382306, now seen corresponding path program 1 times [2023-11-24 23:58:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:22,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429890878] [2023-11-24 23:58:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:58:22,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:22,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429890878] [2023-11-24 23:58:22,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429890878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:22,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081019171] [2023-11-24 23:58:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:22,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:22,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:22,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:22,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:58:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:22,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:58:22,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:22,799 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 7 treesize of output 3 [2023-11-24 23:58:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:58:22,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:58:22,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081019171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:22,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:58:22,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [16] total 18 [2023-11-24 23:58:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287427453] [2023-11-24 23:58:22,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:22,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:58:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:22,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:58:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:58:22,861 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2023-11-24 23:58:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:22,934 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-11-24 23:58:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:58:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 33 [2023-11-24 23:58:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:22,936 INFO L225 Difference]: With dead ends: 55 [2023-11-24 23:58:22,936 INFO L226 Difference]: Without dead ends: 55 [2023-11-24 23:58:22,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:58:22,937 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:22,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:58:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-24 23:58:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-24 23:58:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 50 states have internal predecessors, (55), 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) [2023-11-24 23:58:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-11-24 23:58:22,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 33 [2023-11-24 23:58:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:22,942 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-11-24 23:58:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2023-11-24 23:58:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-11-24 23:58:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:58:22,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:22,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:22,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 23:58:23,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:23,150 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:23,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 783690657, now seen corresponding path program 1 times [2023-11-24 23:58:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:23,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298052285] [2023-11-24 23:58:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:58:23,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298052285] [2023-11-24 23:58:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298052285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:23,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:23,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:58:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891599901] [2023-11-24 23:58:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:58:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:58:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:58:23,408 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 6 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2023-11-24 23:58:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:23,526 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-24 23:58:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:58:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 5.25) internal successors, (21), 5 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 34 [2023-11-24 23:58:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:23,527 INFO L225 Difference]: With dead ends: 54 [2023-11-24 23:58:23,527 INFO L226 Difference]: Without dead ends: 54 [2023-11-24 23:58:23,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:58:23,528 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:23,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 136 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:58:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-24 23:58:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-24 23:58:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 49 states have internal predecessors, (54), 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) [2023-11-24 23:58:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-24 23:58:23,531 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 34 [2023-11-24 23:58:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:23,532 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-24 23:58:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 5.25) internal successors, (21), 5 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) [2023-11-24 23:58:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-24 23:58:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 23:58:23,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:23,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 23:58:23,533 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:23,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1475389933, now seen corresponding path program 1 times [2023-11-24 23:58:23,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:23,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953200503] [2023-11-24 23:58:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:58:23,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:23,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953200503] [2023-11-24 23:58:23,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953200503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:23,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:23,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:58:23,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478751943] [2023-11-24 23:58:23,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:23,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:58:23,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:58:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:58:23,739 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 4 states have (on average 4.5) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-24 23:58:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:23,810 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-24 23:58:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:58:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.5) internal successors, (18), 6 states have internal predecessors, (18), 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 35 [2023-11-24 23:58:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:23,812 INFO L225 Difference]: With dead ends: 52 [2023-11-24 23:58:23,812 INFO L226 Difference]: Without dead ends: 52 [2023-11-24 23:58:23,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:58:23,813 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:23,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 87 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:58:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-24 23:58:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-24 23:58:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 47 states have internal predecessors, (52), 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) [2023-11-24 23:58:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2023-11-24 23:58:23,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 35 [2023-11-24 23:58:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:23,817 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2023-11-24 23:58:23,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.5) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-24 23:58:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2023-11-24 23:58:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 23:58:23,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:23,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:58:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 23:58:23,818 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 23:58:23,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash -510416516, now seen corresponding path program 1 times [2023-11-24 23:58:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364146673] [2023-11-24 23:58:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:58:24,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364146673] [2023-11-24 23:58:24,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364146673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017742603] [2023-11-24 23:58:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:24,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:58:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:24,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:58:24,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed6398-79bd-45fb-a63c-43f4ab2589a8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:58:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:24,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-24 23:58:24,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:58:25,253 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 9 treesize of output 5 [2023-11-24 23:58:25,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:25,334 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 18 treesize of output 13 [2023-11-24 23:58:25,667 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 23:58:25,667 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 35 treesize of output 34 [2023-11-24 23:58:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:58:25,736 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 20 [2023-11-24 23:58:25,793 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 26 treesize of output 14 [2023-11-24 23:58:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:58:25,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:58:29,902 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1257 (Array Int Int)) (v_ArrVal_1256 (Array Int Int))) (= (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1256) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1257) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2023-11-24 23:58:29,941 INFO L349 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2023-11-24 23:58:29,942 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 22 treesize of output 21 [2023-11-24 23:58:29,951 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1257 (Array Int Int)) (v_ArrVal_1256 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1256) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1257) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_sll_insert_~last~0#1.base|)) is different from false [2023-11-24 23:58:30,224 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1257 (Array Int Int)) (v_ArrVal_1256 (Array Int Int)) (v_ArrVal_1261 (Array Int Int)) (|v_ULTIMATE.start_sll_insert_#t~ret7#1.base_23| Int)) (or (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_insert_#t~ret7#1.base_23| v_ArrVal_1261) |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1256) |v_ULTIMATE.start_sll_insert_#t~ret7#1.base_23| v_ArrVal_1257) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (< |c_#StackHeapBarrier| (+ 1 |v_ULTIMATE.start_sll_insert_#t~ret7#1.base_23|)))) is different from false [2023-11-24 23:58:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017742603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:58:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025828896] [2023-11-24 23:58:30,229 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-24 23:58:30,229 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:58:30,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:58:30,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:58:30,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:58:31,809 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 144 for LOIs [2023-11-24 23:58:32,332 INFO L180 IcfgInterpreter]: Interpretation finished