./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.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_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:31,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:31,227 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:45:31,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:31,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:31,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:31,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:31,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:31,285 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:31,290 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:31,291 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:31,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:31,293 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:31,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:31,295 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:31,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:31,296 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:45:31,296 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:31,296 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:45:31,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:31,299 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:45:31,299 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:45:31,300 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:45:31,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:31,301 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:45:31,301 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:45:31,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:45:31,302 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:31,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:31,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:31,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:31,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:31,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:31,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:31,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:31,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:31,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:31,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:31,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:31,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:31,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:31,307 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2023-11-26 10:45:31,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:31,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:31,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:31,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:31,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:31,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2023-11-26 10:45:34,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:35,037 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:35,038 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2023-11-26 10:45:35,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/data/8330120ba/d807b3ac94d5400d88c4a3268bd64ba9/FLAGe4cd6986b [2023-11-26 10:45:35,068 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/data/8330120ba/d807b3ac94d5400d88c4a3268bd64ba9 [2023-11-26 10:45:35,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:35,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:35,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:35,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:35,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:35,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641bbeed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35, skipping insertion in model container [2023-11-26 10:45:35,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,128 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:35,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:35,561 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:35,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:35,672 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:35,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35 WrapperNode [2023-11-26 10:45:35,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:35,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:35,675 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:35,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:35,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,758 INFO L138 Inliner]: procedures = 126, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 120 [2023-11-26 10:45:35,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:35,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:35,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:35,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:35,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,781 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,799 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-11-26 10:45:35,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,817 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:35,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:35,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:35,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:35,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (1/1) ... [2023-11-26 10:45:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:35,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:35,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:35,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:35,913 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-26 10:45:35,914 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-26 10:45:35,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:45:35,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:45:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:45:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:45:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:45:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:45:35,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:45:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 10:45:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:45:35,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 10:45:35,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:45:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:45:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:45:35,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:35,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:36,092 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:36,095 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:45:36,137 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-26 10:45:36,468 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:45:36,519 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:45:36,519 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 10:45:36,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:36 BoogieIcfgContainer [2023-11-26 10:45:36,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:45:36,522 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:45:36,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:45:36,525 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:45:36,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:35" (1/3) ... [2023-11-26 10:45:36,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69717a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:36, skipping insertion in model container [2023-11-26 10:45:36,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:35" (2/3) ... [2023-11-26 10:45:36,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69717a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:36, skipping insertion in model container [2023-11-26 10:45:36,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:36" (3/3) ... [2023-11-26 10:45:36,528 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2023-11-26 10:45:36,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:45:36,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2023-11-26 10:45:36,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:36,592 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=PETRI_NET, 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;@30c35d9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:36,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-26 10:45:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 56 states have internal predecessors, (72), 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) [2023-11-26 10:45:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 10:45:36,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:36,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 10:45:36,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:36,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash 6033865, now seen corresponding path program 1 times [2023-11-26 10:45:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651011770] [2023-11-26 10:45:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:36,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:36,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651011770] [2023-11-26 10:45:36,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651011770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:36,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:36,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374527689] [2023-11-26 10:45:36,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:36,886 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 56 states have internal predecessors, (72), 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:36,969 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2023-11-26 10:45:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 10:45:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:36,980 INFO L225 Difference]: With dead ends: 54 [2023-11-26 10:45:36,980 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 10:45:36,982 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 [2023-11-26 10:45:36,994 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:36,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 67 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 10:45:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-26 10:45:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-26 10:45:37,037 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 4 [2023-11-26 10:45:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:37,038 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-26 10:45:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-26 10:45:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 10:45:37,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:37,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 10:45:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:45:37,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:37,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 6033866, now seen corresponding path program 1 times [2023-11-26 10:45:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:37,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993044487] [2023-11-26 10:45:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993044487] [2023-11-26 10:45:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993044487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:37,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:37,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246621635] [2023-11-26 10:45:37,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:37,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:37,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:37,181 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:37,239 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-11-26 10:45:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-26 10:45:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:37,241 INFO L225 Difference]: With dead ends: 47 [2023-11-26 10:45:37,241 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 10:45:37,241 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 [2023-11-26 10:45:37,243 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:37,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 10:45:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-26 10:45:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-11-26 10:45:37,251 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 4 [2023-11-26 10:45:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:37,252 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-11-26 10:45:37,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-11-26 10:45:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 10:45:37,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:37,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 10:45:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:45:37,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:37,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1506349614, now seen corresponding path program 1 times [2023-11-26 10:45:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:37,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126717261] [2023-11-26 10:45:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:37,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126717261] [2023-11-26 10:45:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126717261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:37,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:37,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:37,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397596492] [2023-11-26 10:45:37,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:37,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:37,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:37,349 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:37,403 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-11-26 10:45:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-26 10:45:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:37,407 INFO L225 Difference]: With dead ends: 57 [2023-11-26 10:45:37,408 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 10:45:37,408 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 [2023-11-26 10:45:37,410 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:37,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 10:45:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2023-11-26 10:45:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-26 10:45:37,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 6 [2023-11-26 10:45:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:37,417 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-26 10:45:37,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-26 10:45:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:45:37,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:37,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:37,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:45:37,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:37,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:37,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1828366541, now seen corresponding path program 1 times [2023-11-26 10:45:37,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:37,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388261653] [2023-11-26 10:45:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:37,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388261653] [2023-11-26 10:45:37,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388261653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:37,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:37,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936560408] [2023-11-26 10:45:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:37,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:37,565 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:37,631 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-26 10:45:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:37,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-26 10:45:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:37,633 INFO L225 Difference]: With dead ends: 54 [2023-11-26 10:45:37,633 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 10:45:37,633 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 [2023-11-26 10:45:37,635 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:37,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 10:45:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-11-26 10:45:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-11-26 10:45:37,643 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 8 [2023-11-26 10:45:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:37,643 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-11-26 10:45:37,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-11-26 10:45:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:45:37,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:37,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:37,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:45:37,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:37,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:37,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1117956245, now seen corresponding path program 1 times [2023-11-26 10:45:37,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:37,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787331190] [2023-11-26 10:45:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787331190] [2023-11-26 10:45:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787331190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691209152] [2023-11-26 10:45:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:37,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:37,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:45:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:37,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691209152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:38,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-26 10:45:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143697464] [2023-11-26 10:45:38,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:38,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:45:38,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:45:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:38,008 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:38,043 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-11-26 10:45:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:38,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-26 10:45:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:38,045 INFO L225 Difference]: With dead ends: 55 [2023-11-26 10:45:38,045 INFO L226 Difference]: Without dead ends: 55 [2023-11-26 10:45:38,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:38,047 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:38,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-26 10:45:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-26 10:45:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.605263157894737) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-11-26 10:45:38,054 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 13 [2023-11-26 10:45:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:38,055 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-11-26 10:45:38,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-11-26 10:45:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:45:38,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:38,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 10:45:38,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:38,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:38,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:38,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1016238794, now seen corresponding path program 1 times [2023-11-26 10:45:38,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:38,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714997848] [2023-11-26 10:45:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:38,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:38,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:38,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714997848] [2023-11-26 10:45:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714997848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047136449] [2023-11-26 10:45:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:38,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:38,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:38,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:38,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:45:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:38,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:45:38,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:38,662 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 [2023-11-26 10:45:38,706 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 10:45:38,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-26 10:45:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:38,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:38,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047136449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:38,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2023-11-26 10:45:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435450062] [2023-11-26 10:45:38,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:38,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:38,849 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:39,006 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-26 10:45:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 10:45:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:39,007 INFO L225 Difference]: With dead ends: 54 [2023-11-26 10:45:39,007 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 10:45:39,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:39,009 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:39,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 10:45:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-26 10:45:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-26 10:45:39,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 15 [2023-11-26 10:45:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:39,015 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-26 10:45:39,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-26 10:45:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:45:39,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:39,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 10:45:39,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:45:39,231 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:39,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:39,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1016238795, now seen corresponding path program 1 times [2023-11-26 10:45:39,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738208918] [2023-11-26 10:45:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:39,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738208918] [2023-11-26 10:45:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738208918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45886969] [2023-11-26 10:45:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:39,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:39,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:39,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:39,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 10:45:39,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:39,678 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 [2023-11-26 10:45:39,683 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 [2023-11-26 10:45:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:39,770 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 [2023-11-26 10:45:39,787 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:45:39,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:45:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:39,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:40,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45886969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:40,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:40,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-11-26 10:45:40,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700746774] [2023-11-26 10:45:40,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:40,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:45:40,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:45:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:40,144 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:40,317 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-11-26 10:45:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:40,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 10:45:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:40,323 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:45:40,323 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 10:45:40,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:40,326 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:40,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 129 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 10:45:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-26 10:45:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-11-26 10:45:40,342 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2023-11-26 10:45:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:40,342 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-11-26 10:45:40,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:40,343 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-11-26 10:45:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:45:40,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:40,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:40,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:40,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:40,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:40,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1560880014, now seen corresponding path program 2 times [2023-11-26 10:45:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620053166] [2023-11-26 10:45:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:40,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620053166] [2023-11-26 10:45:40,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620053166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240158277] [2023-11-26 10:45:40,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:40,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:40,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:40,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:40,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:40,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:40,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:40,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:40,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:40,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240158277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:40,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-26 10:45:40,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056837616] [2023-11-26 10:45:40,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:40,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:40,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:40,827 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:40,880 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-26 10:45:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-26 10:45:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:40,881 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:45:40,881 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 10:45:40,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:40,883 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:40,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 102 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 10:45:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-26 10:45:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-26 10:45:40,903 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 20 [2023-11-26 10:45:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:40,903 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-26 10:45:40,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-26 10:45:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:45:40,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:40,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:40,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:41,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:41,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash 644040407, now seen corresponding path program 1 times [2023-11-26 10:45:41,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:41,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060398400] [2023-11-26 10:45:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:45:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:41,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060398400] [2023-11-26 10:45:41,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060398400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:41,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:41,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282374563] [2023-11-26 10:45:41,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:41,241 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:41,372 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-11-26 10:45:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 10:45:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:41,375 INFO L225 Difference]: With dead ends: 71 [2023-11-26 10:45:41,375 INFO L226 Difference]: Without dead ends: 71 [2023-11-26 10:45:41,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:41,377 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:41,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 92 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-26 10:45:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2023-11-26 10:45:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-11-26 10:45:41,383 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 21 [2023-11-26 10:45:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:41,384 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-11-26 10:45:41,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-11-26 10:45:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:45:41,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:41,385 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:45:41,386 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:41,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash 644040408, now seen corresponding path program 1 times [2023-11-26 10:45:41,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:41,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833804398] [2023-11-26 10:45:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833804398] [2023-11-26 10:45:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833804398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:41,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:41,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446885026] [2023-11-26 10:45:41,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:41,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:41,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:41,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:41,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:41,647 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:41,784 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-26 10:45:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 10:45:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:41,786 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:45:41,786 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 10:45:41,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:41,787 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:41,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 102 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 10:45:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-26 10:45:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-26 10:45:41,807 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 21 [2023-11-26 10:45:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:41,807 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-26 10:45:41,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-26 10:45:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:45:41,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:41,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:45:41,810 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:41,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash 446255910, now seen corresponding path program 1 times [2023-11-26 10:45:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:41,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260681295] [2023-11-26 10:45:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260681295] [2023-11-26 10:45:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260681295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:41,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438648364] [2023-11-26 10:45:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:41,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:41,911 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:41,936 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-26 10:45:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:45:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:41,940 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:45:41,940 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 10:45:41,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:45:41,941 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:41,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 46 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 10:45:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2023-11-26 10:45:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-11-26 10:45:41,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2023-11-26 10:45:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:41,945 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-11-26 10:45:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-11-26 10:45:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:45:41,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:41,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:41,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:45:41,946 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:41,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash 447643490, now seen corresponding path program 1 times [2023-11-26 10:45:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:41,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654825047] [2023-11-26 10:45:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:42,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:42,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654825047] [2023-11-26 10:45:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654825047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:42,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:42,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292559658] [2023-11-26 10:45:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:42,077 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:42,129 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-26 10:45:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:45:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:42,131 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:45:42,131 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 10:45:42,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:42,133 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:42,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 10:45:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-26 10:45:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-11-26 10:45:42,136 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2023-11-26 10:45:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:42,136 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-11-26 10:45:42,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-11-26 10:45:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:45:42,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:42,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:42,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:45:42,138 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:42,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash 447643435, now seen corresponding path program 1 times [2023-11-26 10:45:42,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:42,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066815128] [2023-11-26 10:45:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:42,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066815128] [2023-11-26 10:45:42,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066815128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:42,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186055310] [2023-11-26 10:45:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:42,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:42,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:42,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:42,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:42,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 10:45:42,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:42,981 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 [2023-11-26 10:45:43,022 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:45:43,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:45:43,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:45:43,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:45:43,126 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:45:43,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-26 10:45:43,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:43,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-26 10:45:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:43,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:43,457 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2023-11-26 10:45:43,457 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 21 treesize of output 20 [2023-11-26 10:45:43,465 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_589 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_589) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) is different from false [2023-11-26 10:45:43,498 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_589 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_589) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) is different from false [2023-11-26 10:45:43,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:43,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-26 10:45:43,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:43,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2023-11-26 10:45:43,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 10:45:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 10:45:43,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186055310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:43,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:43,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-26 10:45:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077012963] [2023-11-26 10:45:43,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:45:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:45:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=527, Unknown=2, NotChecked=94, Total=702 [2023-11-26 10:45:43,629 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:44,447 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2023-11-26 10:45:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:45:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:45:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:44,448 INFO L225 Difference]: With dead ends: 88 [2023-11-26 10:45:44,449 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 10:45:44,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=975, Unknown=2, NotChecked=134, Total=1332 [2023-11-26 10:45:44,450 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:44,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 343 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 584 Invalid, 0 Unknown, 124 Unchecked, 0.4s Time] [2023-11-26 10:45:44,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 10:45:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2023-11-26 10:45:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.434782608695652) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-26 10:45:44,453 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 23 [2023-11-26 10:45:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:44,453 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-26 10:45:44,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-26 10:45:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 10:45:44,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:44,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:44,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:45:44,662 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:44,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 447643436, now seen corresponding path program 1 times [2023-11-26 10:45:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113887443] [2023-11-26 10:45:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:45,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113887443] [2023-11-26 10:45:45,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113887443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:45,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688503632] [2023-11-26 10:45:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:45,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:45,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:45,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:45,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:45,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-26 10:45:45,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:45,748 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 [2023-11-26 10:45:45,834 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:45:45,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:45:45,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:45:45,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:45:45,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:45:45,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:45:46,032 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:45:46,033 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 63 treesize of output 56 [2023-11-26 10:45:46,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2023-11-26 10:45:46,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-11-26 10:45:46,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-26 10:45:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:46,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:46,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:46,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2023-11-26 10:45:46,629 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_689 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_689) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_688 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_688) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0))) (forall ((v_prenex_1 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse0) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 9))))) is different from false [2023-11-26 10:45:46,662 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)) (.cse1 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (.cse2 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_688 (Array Int Int)) (v_ArrVal_685 Int)) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse0 .cse1 v_ArrVal_685)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_688) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2))) (forall ((v_ArrVal_689 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_689) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (forall ((v_ArrVal_685 Int) (v_prenex_1 (Array Int Int))) (< (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store .cse0 .cse1 v_ArrVal_685)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_prenex_1) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse2) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 9))))) is different from false [2023-11-26 10:45:46,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:46,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-26 10:45:46,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:46,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2023-11-26 10:45:46,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 10:45:46,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:46,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-26 10:45:46,712 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:45:46,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-26 10:45:46,723 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-26 10:45:46,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 1 [2023-11-26 10:45:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 10:45:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688503632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:46,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:46,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-26 10:45:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555207859] [2023-11-26 10:45:46,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:46,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 10:45:46,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:46,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 10:45:46,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=787, Unknown=2, NotChecked=114, Total=992 [2023-11-26 10:45:46,962 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:48,203 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2023-11-26 10:45:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:45:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 10:45:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:48,205 INFO L225 Difference]: With dead ends: 95 [2023-11-26 10:45:48,205 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 10:45:48,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=1386, Unknown=2, NotChecked=158, Total=1806 [2023-11-26 10:45:48,206 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:48,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 408 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 581 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2023-11-26 10:45:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 10:45:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2023-11-26 10:45:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-26 10:45:48,212 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 23 [2023-11-26 10:45:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:48,212 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-26 10:45:48,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-26 10:45:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:45:48,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:48,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:48,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:48,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:48,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:48,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -739060025, now seen corresponding path program 1 times [2023-11-26 10:45:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:48,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772817535] [2023-11-26 10:45:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:48,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:48,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772817535] [2023-11-26 10:45:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772817535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189671677] [2023-11-26 10:45:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:48,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:48,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:48,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:48,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:48,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 10:45:48,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:48,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189671677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:48,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:48,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-26 10:45:48,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630001401] [2023-11-26 10:45:48,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:48,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:45:48,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:45:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:48,735 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:48,782 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-11-26 10:45:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 10:45:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:48,783 INFO L225 Difference]: With dead ends: 57 [2023-11-26 10:45:48,784 INFO L226 Difference]: Without dead ends: 57 [2023-11-26 10:45:48,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:45:48,786 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:48,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 71 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-26 10:45:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-26 10:45:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-11-26 10:45:48,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 27 [2023-11-26 10:45:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:48,790 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-11-26 10:45:48,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-11-26 10:45:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 10:45:48,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:48,791 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:48,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:48,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:48,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:48,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:48,998 INFO L85 PathProgramCache]: Analyzing trace with hash 309852309, now seen corresponding path program 1 times [2023-11-26 10:45:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:48,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797819258] [2023-11-26 10:45:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:48,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:45:49,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797819258] [2023-11-26 10:45:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797819258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899132894] [2023-11-26 10:45:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:49,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:49,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:45:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:49,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:45:49,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:45:49,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:45:49,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899132894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:49,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:49,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-26 10:45:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186956194] [2023-11-26 10:45:49,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:49,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:45:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:45:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:49,440 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:49,501 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-11-26 10:45:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-26 10:45:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:49,503 INFO L225 Difference]: With dead ends: 42 [2023-11-26 10:45:49,503 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:45:49,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:45:49,504 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:49,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 83 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:45:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-11-26 10:45:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-26 10:45:49,508 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2023-11-26 10:45:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:49,508 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-26 10:45:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-26 10:45:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:45:49,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:49,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:49,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:49,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:49,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash 972438290, now seen corresponding path program 1 times [2023-11-26 10:45:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740905850] [2023-11-26 10:45:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:45:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740905850] [2023-11-26 10:45:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740905850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690644518] [2023-11-26 10:45:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:49,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:49,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:49,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:45:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:50,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:45:50,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:45:50,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:45:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690644518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:50,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:50,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-26 10:45:50,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246356287] [2023-11-26 10:45:50,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:50,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:45:50,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:45:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:45:50,109 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:50,145 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2023-11-26 10:45:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-26 10:45:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:50,147 INFO L225 Difference]: With dead ends: 43 [2023-11-26 10:45:50,147 INFO L226 Difference]: Without dead ends: 43 [2023-11-26 10:45:50,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:45:50,148 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:50,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 58 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:45:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-26 10:45:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-26 10:45:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-11-26 10:45:50,151 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 29 [2023-11-26 10:45:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:50,153 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-11-26 10:45:50,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-11-26 10:45:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 10:45:50,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:50,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:50,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:50,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:45:50,361 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1797684858, now seen corresponding path program 2 times [2023-11-26 10:45:50,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:50,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215865262] [2023-11-26 10:45:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:50,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:45:50,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:50,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215865262] [2023-11-26 10:45:50,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215865262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:50,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682554836] [2023-11-26 10:45:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:50,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:50,512 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:50,623 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2023-11-26 10:45:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:45:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-26 10:45:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:50,625 INFO L225 Difference]: With dead ends: 53 [2023-11-26 10:45:50,625 INFO L226 Difference]: Without dead ends: 53 [2023-11-26 10:45:50,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:50,625 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:50,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-26 10:45:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2023-11-26 10:45:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-11-26 10:45:50,628 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 32 [2023-11-26 10:45:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:50,628 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-11-26 10:45:50,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-11-26 10:45:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 10:45:50,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:50,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:50,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:45:50,629 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:50,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:50,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1797684859, now seen corresponding path program 1 times [2023-11-26 10:45:50,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:50,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799968263] [2023-11-26 10:45:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:50,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:45:50,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799968263] [2023-11-26 10:45:50,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799968263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:50,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:50,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:50,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358898118] [2023-11-26 10:45:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:50,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:50,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:50,852 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:50,975 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-11-26 10:45:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-26 10:45:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:50,976 INFO L225 Difference]: With dead ends: 49 [2023-11-26 10:45:50,976 INFO L226 Difference]: Without dead ends: 49 [2023-11-26 10:45:50,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:50,977 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:50,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-26 10:45:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-26 10:45:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.2) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-11-26 10:45:50,980 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 32 [2023-11-26 10:45:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:50,980 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-11-26 10:45:50,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-11-26 10:45:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:45:50,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:50,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:50,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:45:50,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:50,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash -106345640, now seen corresponding path program 1 times [2023-11-26 10:45:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:50,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200524162] [2023-11-26 10:45:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:50,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:45:51,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:51,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200524162] [2023-11-26 10:45:51,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200524162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:51,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:51,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:45:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584373596] [2023-11-26 10:45:51,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:51,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:51,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:51,101 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:51,185 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-11-26 10:45:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:51,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-26 10:45:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:51,186 INFO L225 Difference]: With dead ends: 48 [2023-11-26 10:45:51,186 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 10:45:51,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:51,187 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:51,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 58 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 10:45:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2023-11-26 10:45:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-11-26 10:45:51,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2023-11-26 10:45:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:51,189 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-11-26 10:45:51,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-11-26 10:45:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 10:45:51,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:51,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:51,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 10:45:51,190 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:51,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash 998328825, now seen corresponding path program 1 times [2023-11-26 10:45:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:51,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60271788] [2023-11-26 10:45:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:45:51,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:51,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60271788] [2023-11-26 10:45:51,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60271788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:51,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:51,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:45:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141540865] [2023-11-26 10:45:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:51,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:51,319 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:51,396 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-11-26 10:45:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-26 10:45:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:51,397 INFO L225 Difference]: With dead ends: 46 [2023-11-26 10:45:51,397 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:45:51,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:51,398 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:51,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:45:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:45:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-26 10:45:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.170731707317073) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-26 10:45:51,401 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 34 [2023-11-26 10:45:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:51,401 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-26 10:45:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-26 10:45:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 10:45:51,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:51,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:51,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 10:45:51,402 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:51,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1434327753, now seen corresponding path program 1 times [2023-11-26 10:45:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:51,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756458123] [2023-11-26 10:45:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:45:52,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:52,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756458123] [2023-11-26 10:45:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756458123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:52,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927842463] [2023-11-26 10:45:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:52,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:52,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:52,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:52,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:45:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:52,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-26 10:45:52,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:52,847 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 [2023-11-26 10:45:52,879 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:45:52,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:45:52,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:45:52,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:45:53,016 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:45:53,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-26 10:45:53,288 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:45:53,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-26 10:45:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:53,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:53,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2023-11-26 10:45:53,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:53,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 32 [2023-11-26 10:45:53,645 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-26 10:45:53,646 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 18 treesize of output 13 [2023-11-26 10:45:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:53,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:53,792 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1358 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) |c_ULTIMATE.start_dll_update_at_~head#1.offset| (select v_ArrVal_1358 |c_ULTIMATE.start_dll_update_at_~head#1.offset|)) v_ArrVal_1358)) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1358) |c_ULTIMATE.start_main_~s~0#1.base|) 4)) 1))) is different from false [2023-11-26 10:45:53,951 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1357 (Array Int Int)) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_36|) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1357) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_36| v_DerPreprocessor_1) 4)) 1))) is different from false [2023-11-26 10:45:53,974 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1357 (Array Int Int)) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_36|) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_1357) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_36| v_DerPreprocessor_1) 4)) 1))) is different from false [2023-11-26 10:45:54,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:54,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 65 [2023-11-26 10:45:54,463 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_1357 (Array Int Int)) (v_ArrVal_1356 (Array Int Int)) (v_DerPreprocessor_1 Int)) (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1356))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1357)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_36| v_DerPreprocessor_1) 4) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_1357 (Array Int Int)) (v_ArrVal_1356 (Array Int Int)) (v_DerPreprocessor_1 Int)) (= (select (store (select (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1356))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1357)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_36| v_DerPreprocessor_1) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))))) is different from false [2023-11-26 10:45:54,514 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)))) (and (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_1357 (Array Int Int)) (v_ArrVal_1356 (Array Int Int)) (v_DerPreprocessor_1 Int)) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (select (store (select (let ((.cse0 (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1356))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1357)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_36| v_DerPreprocessor_1) 4)))))) (forall ((|v_ULTIMATE.start_dll_update_at_~head#1.offset_36| Int)) (or (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_36|) (forall ((v_ArrVal_1357 (Array Int Int)) (v_ArrVal_1356 (Array Int Int)) (v_DerPreprocessor_1 Int)) (= (select (store (select (let ((.cse3 (store .cse2 |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1356))) (store .cse3 (select (select .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) v_ArrVal_1357)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_36| v_DerPreprocessor_1) 4) |c_ULTIMATE.start_dll_create_~head~0#1.base|)))))) is different from false [2023-11-26 10:45:54,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:54,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 47 [2023-11-26 10:45:54,539 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 181 treesize of output 167 [2023-11-26 10:45:54,552 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 104 treesize of output 100 [2023-11-26 10:45:54,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:54,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 128 [2023-11-26 10:45:54,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:54,598 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 84 treesize of output 83 [2023-11-26 10:45:54,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:54,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 46 [2023-11-26 10:45:54,727 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:45:54,731 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 60 treesize of output 50 [2023-11-26 10:45:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:45:54,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-26 10:45:54,755 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:45:54,771 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-26 10:45:54,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 31 [2023-11-26 10:45:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-11-26 10:45:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927842463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:54,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:54,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 44 [2023-11-26 10:45:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747007116] [2023-11-26 10:45:54,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:54,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-26 10:45:54,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:54,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-26 10:45:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1372, Unknown=41, NotChecked=400, Total=1980 [2023-11-26 10:45:54,939 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 45 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:45:56,312 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-11-26 10:45:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:45:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-26 10:45:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:45:56,316 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:45:56,316 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:45:56,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=340, Invalid=2187, Unknown=43, NotChecked=510, Total=3080 [2023-11-26 10:45:56,318 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:45:56,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 194 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 666 Invalid, 0 Unknown, 259 Unchecked, 0.6s Time] [2023-11-26 10:45:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:45:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-11-26 10:45:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-11-26 10:45:56,321 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 37 [2023-11-26 10:45:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:45:56,321 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-11-26 10:45:56,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-11-26 10:45:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 10:45:56,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:45:56,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:56,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 10:45:56,526 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:45:56,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1434327752, now seen corresponding path program 1 times [2023-11-26 10:45:56,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:56,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380711082] [2023-11-26 10:45:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:56,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:57,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:57,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380711082] [2023-11-26 10:45:57,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380711082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:57,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523388610] [2023-11-26 10:45:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:57,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:57,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:57,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:58,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:45:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:58,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-26 10:45:58,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:58,257 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 12 treesize of output 14 [2023-11-26 10:45:58,408 INFO L349 Elim1Store]: treesize reduction 28, result has 26.3 percent of original size [2023-11-26 10:45:58,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2023-11-26 10:45:58,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:45:58,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:45:58,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:45:58,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:45:58,722 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:45:58,722 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-11-26 10:45:58,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-26 10:45:59,290 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:45:59,291 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-11-26 10:45:59,308 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-26 10:45:59,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 10:45:59,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-26 10:45:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:59,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:45:59,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:59,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:45:59,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2023-11-26 10:45:59,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:59,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 36 [2023-11-26 10:45:59,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:45:59,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:45:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:59,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:00,265 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_1489 Int)) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.offset| v_ArrVal_1489)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))) (forall ((v_ArrVal_1491 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) |c_ULTIMATE.start_dll_update_at_~head#1.offset| (select v_ArrVal_1491 |c_ULTIMATE.start_dll_update_at_~head#1.offset|)) v_ArrVal_1491)) (forall ((v_ArrVal_1489 Int)) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_dll_update_at_~head#1.offset| v_ArrVal_1489)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1491) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))))) is different from false [2023-11-26 10:46:01,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:01,499 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 95 treesize of output 99 [2023-11-26 10:46:02,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 61 [2023-11-26 10:46:02,495 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 328 treesize of output 306 [2023-11-26 10:46:02,513 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 247 treesize of output 239 [2023-11-26 10:46:02,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 291 [2023-11-26 10:46:02,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,589 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 141 treesize of output 129 [2023-11-26 10:46:02,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2023-11-26 10:46:02,923 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 36 treesize of output 24 [2023-11-26 10:46:02,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-26 10:46:02,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 75 [2023-11-26 10:46:02,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:02,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 63 [2023-11-26 10:46:02,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 84 [2023-11-26 10:46:02,988 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 255 treesize of output 245 [2023-11-26 10:46:03,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2023-11-26 10:46:03,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:03,021 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 78 treesize of output 80 [2023-11-26 10:46:03,049 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 89 treesize of output 77 [2023-11-26 10:46:03,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:03,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 48 [2023-11-26 10:46:03,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:03,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 75 [2023-11-26 10:46:03,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:03,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 63 [2023-11-26 10:46:03,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 84 [2023-11-26 10:46:03,331 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 165 treesize of output 157 [2023-11-26 10:46:03,341 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 69 treesize of output 57 [2023-11-26 10:46:03,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:03,367 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 60 treesize of output 62 [2023-11-26 10:46:03,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2023-11-26 10:46:03,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:03,399 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 50 treesize of output 48 [2023-11-26 10:46:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-26 10:46:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523388610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:03,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 52 [2023-11-26 10:46:03,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670891167] [2023-11-26 10:46:03,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-26 10:46:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-26 10:46:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2445, Unknown=8, NotChecked=100, Total=2756 [2023-11-26 10:46:03,977 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:08,012 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2023-11-26 10:46:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 10:46:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-26 10:46:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:08,013 INFO L225 Difference]: With dead ends: 60 [2023-11-26 10:46:08,013 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 10:46:08,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=591, Invalid=4802, Unknown=13, NotChecked=144, Total=5550 [2023-11-26 10:46:08,017 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 146 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 38 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:08,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 185 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 966 Invalid, 5 Unknown, 58 Unchecked, 1.3s Time] [2023-11-26 10:46:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 10:46:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2023-11-26 10:46:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-11-26 10:46:08,024 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 37 [2023-11-26 10:46:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:08,024 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-11-26 10:46:08,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-11-26 10:46:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 10:46:08,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:08,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:08,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:08,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 10:46:08,233 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:46:08,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash 295564662, now seen corresponding path program 1 times [2023-11-26 10:46:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011113634] [2023-11-26 10:46:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011113634] [2023-11-26 10:46:09,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011113634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:09,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216941149] [2023-11-26 10:46:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:09,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:09,349 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:46:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-26 10:46:09,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:09,584 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 [2023-11-26 10:46:09,647 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:46:09,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:46:09,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:09,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 10:46:09,792 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:46:09,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-26 10:46:10,093 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:46:10,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-26 10:46:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:46:10,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:10,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2023-11-26 10:46:10,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:10,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 32 [2023-11-26 10:46:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:46:10,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:10,575 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1615 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) |c_ULTIMATE.start_dll_update_at_~head#1.offset| (select v_ArrVal_1615 |c_ULTIMATE.start_dll_update_at_~head#1.offset|)) v_ArrVal_1615)) (< (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1615) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2023-11-26 10:46:10,970 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1614 (Array Int Int)) (v_DerPreprocessor_4 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_46| Int)) (or (< (select (store (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1614) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_46| v_DerPreprocessor_4) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_46|))) is different from false [2023-11-26 10:46:10,983 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1614 (Array Int Int)) (v_DerPreprocessor_4 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_46| Int)) (or (< |c_ULTIMATE.start_dll_create_~head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_46|) (< (select (store (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_1614) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_46| v_DerPreprocessor_4) 4) |c_#StackHeapBarrier|))) is different from false [2023-11-26 10:46:11,266 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1614 (Array Int Int)) (v_ArrVal_1613 (Array Int Int)) (v_DerPreprocessor_4 Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_46| Int)) (or (< (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|) 0)) |c_ULTIMATE.start_dll_create_~head~0#1.base| v_ArrVal_1613))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) v_ArrVal_1614)) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_46| v_DerPreprocessor_4) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| |v_ULTIMATE.start_dll_update_at_~head#1.offset_46|))) is different from false [2023-11-26 10:46:11,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:11,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 46 [2023-11-26 10:46:11,283 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 176 treesize of output 162 [2023-11-26 10:46:11,291 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 110 treesize of output 106 [2023-11-26 10:46:11,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:11,314 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 64 treesize of output 63 [2023-11-26 10:46:11,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:11,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 82 [2023-11-26 10:46:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-26 10:46:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216941149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:11,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 44 [2023-11-26 10:46:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147349077] [2023-11-26 10:46:11,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:11,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-26 10:46:11,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:11,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-26 10:46:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1442, Unknown=48, NotChecked=324, Total=1980 [2023-11-26 10:46:11,832 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 45 states, 44 states have (on average 2.272727272727273) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:13,289 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-11-26 10:46:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 10:46:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.272727272727273) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-26 10:46:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:13,290 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:46:13,290 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:46:13,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=365, Invalid=2465, Unknown=48, NotChecked=428, Total=3306 [2023-11-26 10:46:13,292 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:13,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 329 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 855 Invalid, 0 Unknown, 224 Unchecked, 0.7s Time] [2023-11-26 10:46:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:46:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-11-26 10:46:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-11-26 10:46:13,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 39 [2023-11-26 10:46:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:13,295 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-11-26 10:46:13,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.272727272727273) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-11-26 10:46:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 10:46:13,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:13,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:13,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:13,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:13,503 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:46:13,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash 484060314, now seen corresponding path program 2 times [2023-11-26 10:46:13,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:13,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051828764] [2023-11-26 10:46:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:13,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:15,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051828764] [2023-11-26 10:46:15,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051828764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68930654] [2023-11-26 10:46:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:15,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:15,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:15,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:15,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdffefa-66b3-44f5-8ab5-23556cd2937d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:46:15,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:15,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:15,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-26 10:46:15,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:15,866 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 [2023-11-26 10:46:15,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:15,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:46:15,914 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 19 treesize of output 18 [2023-11-26 10:46:15,922 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 23 treesize of output 11 [2023-11-26 10:46:16,049 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:46:16,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:46:16,126 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 23 treesize of output 16 [2023-11-26 10:46:16,135 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 16 treesize of output 11 [2023-11-26 10:46:16,153 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 19 treesize of output 18 [2023-11-26 10:46:16,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-26 10:46:16,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-26 10:46:16,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-11-26 10:46:16,365 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-26 10:46:16,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2023-11-26 10:46:16,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 25 [2023-11-26 10:46:16,939 INFO L349 Elim1Store]: treesize reduction 160, result has 37.7 percent of original size [2023-11-26 10:46:16,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 128 treesize of output 170 [2023-11-26 10:46:17,024 INFO L349 Elim1Store]: treesize reduction 64, result has 47.5 percent of original size [2023-11-26 10:46:17,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 142 [2023-11-26 10:46:18,186 INFO L349 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2023-11-26 10:46:18,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 190 treesize of output 189 [2023-11-26 10:46:18,240 INFO L349 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2023-11-26 10:46:18,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 155 [2023-11-26 10:46:19,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 10:46:19,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-26 10:46:19,123 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:46:19,124 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 13 treesize of output 11 [2023-11-26 10:46:19,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:46:19,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2023-11-26 10:46:19,576 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-26 10:46:19,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2023-11-26 10:46:19,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:46:19,597 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7