./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/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_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/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_b51e43a3-569a-405c-a665-a03ed49f5ceb/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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:51,669 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:51,738 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:47:51,744 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:51,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:51,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:51,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:51,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:51,774 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:51,775 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:51,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:51,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:51,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:51,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:51,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:51,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:51,780 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:51,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:51,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:51,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:51,782 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:47:51,783 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:47:51,784 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:47:51,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:51,785 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:47:51,785 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:47:51,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:51,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:51,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:51,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:51,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:51,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:51,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:51,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:51,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:51,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:51,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:51,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:51,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:51,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:51,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:51,792 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_b51e43a3-569a-405c-a665-a03ed49f5ceb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2023-11-26 11:47:52,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:52,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:52,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:52,071 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:52,072 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:52,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-26 11:47:55,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:55,501 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:55,502 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2023-11-26 11:47:55,530 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/data/805d2dcdb/f8205fd671184728be62a4337f7f8b91/FLAGebc3a996d [2023-11-26 11:47:55,552 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/data/805d2dcdb/f8205fd671184728be62a4337f7f8b91 [2023-11-26 11:47:55,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:55,562 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:55,563 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:55,564 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:55,569 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:55,570 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:55" (1/1) ... [2023-11-26 11:47:55,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705302f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:55, skipping insertion in model container [2023-11-26 11:47:55,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:55" (1/1) ... [2023-11-26 11:47:55,633 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:56,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:56,097 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:56,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:56,220 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:56,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56 WrapperNode [2023-11-26 11:47:56,221 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:56,222 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:56,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:56,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:56,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,321 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 127 [2023-11-26 11:47:56,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:56,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:56,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:56,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:56,335 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,339 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,360 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 9, 5]. 56 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 6 writes are split as follows [0, 5, 1]. [2023-11-26 11:47:56,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,378 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:56,386 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:56,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:56,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:56,387 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (1/1) ... [2023-11-26 11:47:56,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:56,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:56,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:56,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:47:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:47:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:47:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:47:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-26 11:47:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-26 11:47:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:47:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:47:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:47:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:47:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:47:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:47:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:47:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:47:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:47:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:47:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:47:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:47:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:47:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:56,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:56,651 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:56,654 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:57,062 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:57,133 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:57,133 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:47:57,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:57 BoogieIcfgContainer [2023-11-26 11:47:57,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:57,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:57,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:57,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:57,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:55" (1/3) ... [2023-11-26 11:47:57,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7741001f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:57, skipping insertion in model container [2023-11-26 11:47:57,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:56" (2/3) ... [2023-11-26 11:47:57,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7741001f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:57, skipping insertion in model container [2023-11-26 11:47:57,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:57" (3/3) ... [2023-11-26 11:47:57,148 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2023-11-26 11:47:57,170 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:57,170 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-26 11:47:57,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:57,241 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;@6fe7df96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:57,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-26 11:47:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 67 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:47:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:47:57,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:57,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:47:57,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:47:57,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1330367128, now seen corresponding path program 1 times [2023-11-26 11:47:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512599450] [2023-11-26 11:47:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:57,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:57,586 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 11:47:57,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512599450] [2023-11-26 11:47:57,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512599450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:57,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:57,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:57,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803175469] [2023-11-26 11:47:57,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:57,644 INFO L87 Difference]: Start difference. First operand has 71 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 67 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:57,795 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-11-26 11:47:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:57,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-26 11:47:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:57,807 INFO L225 Difference]: With dead ends: 68 [2023-11-26 11:47:57,808 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 11:47:57,810 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 11:47:57,814 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:57,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 94 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:47:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 11:47:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-26 11:47:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 34 states have (on average 2.0) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:47:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-11-26 11:47:57,867 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 6 [2023-11-26 11:47:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:57,868 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-11-26 11:47:57,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-11-26 11:47:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:47:57,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:57,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:47:57,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:57,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:47:57,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1330367129, now seen corresponding path program 1 times [2023-11-26 11:47:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:57,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50072209] [2023-11-26 11:47:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:57,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:58,001 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 11:47:58,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:58,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50072209] [2023-11-26 11:47:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50072209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:58,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:58,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:58,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548832705] [2023-11-26 11:47:58,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:58,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:58,006 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:58,092 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-26 11:47:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-26 11:47:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:58,098 INFO L225 Difference]: With dead ends: 64 [2023-11-26 11:47:58,099 INFO L226 Difference]: Without dead ends: 64 [2023-11-26 11:47:58,101 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 11:47:58,103 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:58,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:47:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-26 11:47:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-26 11:47:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:47:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-11-26 11:47:58,124 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 6 [2023-11-26 11:47:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:58,124 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-11-26 11:47:58,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-26 11:47:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:47:58,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:58,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:58,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:47:58,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:47:58,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash -654861783, now seen corresponding path program 1 times [2023-11-26 11:47:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:58,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660156558] [2023-11-26 11:47:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:58,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:58,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:47:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:58,362 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 11:47:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660156558] [2023-11-26 11:47:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660156558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:58,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:47:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663551241] [2023-11-26 11:47:58,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:58,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:58,367 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:47:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:58,577 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2023-11-26 11:47:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:47:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:47:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:58,580 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:47:58,581 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 11:47:58,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:47:58,583 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 6 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:58,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 223 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:47:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 11:47:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2023-11-26 11:47:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.911764705882353) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:47:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-11-26 11:47:58,592 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 10 [2023-11-26 11:47:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:58,593 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-11-26 11:47:58,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:47:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-11-26 11:47:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:47:58,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:58,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:58,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:47:58,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:47:58,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -654861782, now seen corresponding path program 1 times [2023-11-26 11:47:58,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:58,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495505858] [2023-11-26 11:47:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:58,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:47:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:58,899 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 11:47:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495505858] [2023-11-26 11:47:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495505858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:58,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:58,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:47:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233490744] [2023-11-26 11:47:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:58,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:58,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:58,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:58,903 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:47:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:59,140 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-11-26 11:47:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:47:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:47:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:59,142 INFO L225 Difference]: With dead ends: 65 [2023-11-26 11:47:59,142 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 11:47:59,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:47:59,144 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 4 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:59,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 239 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:47:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 11:47:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-11-26 11:47:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:47:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-11-26 11:47:59,152 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 10 [2023-11-26 11:47:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:59,152 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-11-26 11:47:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:47:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-26 11:47:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:47:59,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:59,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:47:59,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:47:59,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:59,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1004517177, now seen corresponding path program 1 times [2023-11-26 11:47:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:59,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786385116] [2023-11-26 11:47:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:59,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:59,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 11:47:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:59,245 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 11:47:59,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:59,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786385116] [2023-11-26 11:47:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786385116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:59,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:59,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:59,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118723662] [2023-11-26 11:47:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:59,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:59,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:59,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:59,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:59,249 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:47:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:59,347 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-26 11:47:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 11:47:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:59,349 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:47:59,349 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 11:47:59,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:59,351 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:59,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:47:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 11:47:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2023-11-26 11:47:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:47:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-11-26 11:47:59,358 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 11 [2023-11-26 11:47:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:59,359 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-11-26 11:47:59,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:47:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-11-26 11:47:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:47:59,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:59,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:59,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:47:59,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:47:59,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1019483528, now seen corresponding path program 1 times [2023-11-26 11:47:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927440305] [2023-11-26 11:47:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:59,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:47:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:59,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 11:47:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:47:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927440305] [2023-11-26 11:47:59,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927440305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028469120] [2023-11-26 11:47:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:59,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:59,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:59,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:59,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:47:59,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:59,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:47:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028469120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:59,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-11-26 11:47:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097244643] [2023-11-26 11:47:59,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:59,791 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:47:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:59,906 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2023-11-26 11:47:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:59,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2023-11-26 11:47:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:59,908 INFO L225 Difference]: With dead ends: 67 [2023-11-26 11:47:59,908 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 11:47:59,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:59,910 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:59,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 184 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:47:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 11:47:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-26 11:47:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 62 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:47:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2023-11-26 11:47:59,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 20 [2023-11-26 11:47:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:59,917 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2023-11-26 11:47:59,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:47:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2023-11-26 11:47:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:47:59,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:59,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:59,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:48:00,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:00,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:00,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2097418727, now seen corresponding path program 2 times [2023-11-26 11:48:00,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:00,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200777583] [2023-11-26 11:48:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:00,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:48:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200777583] [2023-11-26 11:48:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200777583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247952732] [2023-11-26 11:48:00,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:00,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:00,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:01,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:01,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:48:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:01,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:48:01,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:01,208 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 11:48:01,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:01,265 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-26 11:48:01,326 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 11:48:01,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-26 11:48:01,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:01,444 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 11:48:01,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-26 11:48:01,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:01,548 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2023-11-26 11:48:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:01,609 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 11:48:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 8 not checked. [2023-11-26 11:48:01,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247952732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:01,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:01,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-11-26 11:48:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695603472] [2023-11-26 11:48:01,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:01,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:48:01,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:48:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=124, Unknown=2, NotChecked=46, Total=210 [2023-11-26 11:48:01,704 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 14 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:48:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:02,083 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-26 11:48:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2023-11-26 11:48:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:02,085 INFO L225 Difference]: With dead ends: 74 [2023-11-26 11:48:02,085 INFO L226 Difference]: Without dead ends: 74 [2023-11-26 11:48:02,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=165, Unknown=2, NotChecked=54, Total=272 [2023-11-26 11:48:02,086 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:02,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 163 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2023-11-26 11:48:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-26 11:48:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2023-11-26 11:48:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-26 11:48:02,092 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 29 [2023-11-26 11:48:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:02,092 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-26 11:48:02,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:48:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-26 11:48:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:48:02,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:02,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:02,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:02,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:02,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2097418728, now seen corresponding path program 1 times [2023-11-26 11:48:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:02,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333585336] [2023-11-26 11:48:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:02,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:02,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:02,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:03,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333585336] [2023-11-26 11:48:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333585336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533912586] [2023-11-26 11:48:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:03,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:03,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:03,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:03,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:03,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:48:03,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:03,313 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 11:48:03,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:03,366 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-26 11:48:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:03,408 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 11:48:03,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:03,486 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 11:48:03,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 11:48:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:03,598 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 11:48:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:03,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:03,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533912586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:03,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-26 11:48:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710073698] [2023-11-26 11:48:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:03,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:03,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2023-11-26 11:48:03,608 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:03,705 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-11-26 11:48:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:48:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-26 11:48:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:03,707 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:48:03,708 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 11:48:03,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-11-26 11:48:03,709 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:03,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2023-11-26 11:48:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 11:48:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-26 11:48:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.631578947368421) internal successors, (62), 56 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-11-26 11:48:03,725 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 29 [2023-11-26 11:48:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:03,726 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-11-26 11:48:03,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-11-26 11:48:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 11:48:03,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:03,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:03,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:03,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1279868691, now seen corresponding path program 1 times [2023-11-26 11:48:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:03,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892110655] [2023-11-26 11:48:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:03,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:04,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:04,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:04,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:48:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:04,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892110655] [2023-11-26 11:48:04,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892110655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:04,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637793736] [2023-11-26 11:48:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:04,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:04,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:04,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:04,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:48:04,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:04,734 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 11:48:04,849 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 3 [2023-11-26 11:48:04,869 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-26 11:48:04,905 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-26 11:48:04,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-26 11:48:04,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:48:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-11-26 11:48:04,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:05,161 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 18 treesize of output 10 [2023-11-26 11:48:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:48:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637793736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:05,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:05,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2023-11-26 11:48:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829857165] [2023-11-26 11:48:05,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:48:05,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:05,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:48:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2023-11-26 11:48:05,224 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 11:48:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:05,795 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2023-11-26 11:48:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:48:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 31 [2023-11-26 11:48:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:05,798 INFO L225 Difference]: With dead ends: 78 [2023-11-26 11:48:05,798 INFO L226 Difference]: Without dead ends: 78 [2023-11-26 11:48:05,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=553, Unknown=1, NotChecked=48, Total=702 [2023-11-26 11:48:05,799 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:05,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 414 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 522 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2023-11-26 11:48:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-26 11:48:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2023-11-26 11:48:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.65) internal successors, (66), 58 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-11-26 11:48:05,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 31 [2023-11-26 11:48:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:05,806 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-11-26 11:48:05,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 11:48:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-11-26 11:48:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 11:48:05,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:05,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:05,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:06,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:06,008 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:06,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:06,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1279868692, now seen corresponding path program 1 times [2023-11-26 11:48:06,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:06,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178034742] [2023-11-26 11:48:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:06,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:48:06,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:06,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178034742] [2023-11-26 11:48:06,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178034742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:06,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840002965] [2023-11-26 11:48:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:06,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:06,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:06,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:06,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:06,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-26 11:48:06,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:07,104 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 15 treesize of output 9 [2023-11-26 11:48:07,110 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 3 [2023-11-26 11:48:07,170 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_insert_~head#1.base_BEFORE_CALL_5| Int)) (<= 0 (+ (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_insert_~head#1.base_BEFORE_CALL_5|) 0) 4))) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2023-11-26 11:48:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:07,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-26 11:48:07,232 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-26 11:48:07,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:48:07,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-26 11:48:07,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:48:07,332 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 37 treesize of output 29 [2023-11-26 11:48:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:48:07,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840002965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:07,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:07,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2023-11-26 11:48:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402310155] [2023-11-26 11:48:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:07,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:48:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:48:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=268, Unknown=1, NotChecked=32, Total=342 [2023-11-26 11:48:07,409 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:07,730 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2023-11-26 11:48:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:48:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-11-26 11:48:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:07,732 INFO L225 Difference]: With dead ends: 82 [2023-11-26 11:48:07,732 INFO L226 Difference]: Without dead ends: 82 [2023-11-26 11:48:07,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=333, Unknown=1, NotChecked=36, Total=420 [2023-11-26 11:48:07,733 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 36 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:07,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 229 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2023-11-26 11:48:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-26 11:48:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2023-11-26 11:48:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-26 11:48:07,738 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 31 [2023-11-26 11:48:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:07,739 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-26 11:48:07,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-26 11:48:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 11:48:07,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:07,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:07,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:07,947 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:07,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1021222134, now seen corresponding path program 1 times [2023-11-26 11:48:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343404997] [2023-11-26 11:48:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:08,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:08,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343404997] [2023-11-26 11:48:08,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343404997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:08,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:08,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31064899] [2023-11-26 11:48:08,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:08,063 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:08,144 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-26 11:48:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-11-26 11:48:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:08,146 INFO L225 Difference]: With dead ends: 72 [2023-11-26 11:48:08,146 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 11:48:08,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:08,147 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:08,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 11:48:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-11-26 11:48:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-11-26 11:48:08,152 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 32 [2023-11-26 11:48:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:08,153 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-11-26 11:48:08,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-11-26 11:48:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:48:08,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:08,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:08,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:48:08,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:08,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1593120071, now seen corresponding path program 1 times [2023-11-26 11:48:08,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:08,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530768987] [2023-11-26 11:48:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-26 11:48:08,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530768987] [2023-11-26 11:48:08,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530768987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:08,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:08,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:48:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687023311] [2023-11-26 11:48:08,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:08,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:08,329 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:08,482 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-11-26 11:48:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:48:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-11-26 11:48:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:08,484 INFO L225 Difference]: With dead ends: 68 [2023-11-26 11:48:08,484 INFO L226 Difference]: Without dead ends: 68 [2023-11-26 11:48:08,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:08,485 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 11 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:08,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 181 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-26 11:48:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-26 11:48:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-26 11:48:08,488 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 33 [2023-11-26 11:48:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:08,489 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-26 11:48:08,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-26 11:48:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:48:08,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:08,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:08,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:48:08,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:08,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1593120072, now seen corresponding path program 1 times [2023-11-26 11:48:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:08,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558980109] [2023-11-26 11:48:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558980109] [2023-11-26 11:48:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558980109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:08,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:08,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:48:08,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796953330] [2023-11-26 11:48:08,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:08,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:08,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:08,684 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:08,798 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-11-26 11:48:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:08,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-26 11:48:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:08,799 INFO L225 Difference]: With dead ends: 67 [2023-11-26 11:48:08,800 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 11:48:08,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:08,801 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 52 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:08,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 114 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 11:48:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-26 11:48:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 61 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-11-26 11:48:08,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 33 [2023-11-26 11:48:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:08,806 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-11-26 11:48:08,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-11-26 11:48:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:48:08,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:08,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:08,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:48:08,808 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:08,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1593281004, now seen corresponding path program 1 times [2023-11-26 11:48:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:08,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707571581] [2023-11-26 11:48:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:08,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:09,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:09,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707571581] [2023-11-26 11:48:09,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707571581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:09,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:09,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:48:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481446084] [2023-11-26 11:48:09,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:09,034 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:09,155 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-26 11:48:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-26 11:48:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:09,157 INFO L225 Difference]: With dead ends: 64 [2023-11-26 11:48:09,157 INFO L226 Difference]: Without dead ends: 64 [2023-11-26 11:48:09,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:09,158 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 54 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:09,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 138 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-26 11:48:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-26 11:48:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-11-26 11:48:09,162 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 33 [2023-11-26 11:48:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:09,162 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-11-26 11:48:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-11-26 11:48:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:48:09,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:09,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:09,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:48:09,164 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:09,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2147069245, now seen corresponding path program 1 times [2023-11-26 11:48:09,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:09,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143850583] [2023-11-26 11:48:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:09,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143850583] [2023-11-26 11:48:09,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143850583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:09,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:09,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:09,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24748519] [2023-11-26 11:48:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:09,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:48:09,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:48:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:09,296 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:09,386 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-11-26 11:48:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:48:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-26 11:48:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:09,388 INFO L225 Difference]: With dead ends: 63 [2023-11-26 11:48:09,388 INFO L226 Difference]: Without dead ends: 63 [2023-11-26 11:48:09,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:09,389 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:09,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 123 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-26 11:48:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-26 11:48:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.441860465116279) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-11-26 11:48:09,393 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 34 [2023-11-26 11:48:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:09,393 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-11-26 11:48:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-11-26 11:48:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:48:09,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:09,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:09,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:48:09,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:09,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2147069246, now seen corresponding path program 1 times [2023-11-26 11:48:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:09,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811546451] [2023-11-26 11:48:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:09,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:48:09,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811546451] [2023-11-26 11:48:09,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811546451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83758709] [2023-11-26 11:48:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:09,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:09,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:09,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:09,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:48:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:10,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:48:10,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:10,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83758709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:10,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2023-11-26 11:48:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516596241] [2023-11-26 11:48:10,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:48:10,104 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:10,163 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-11-26 11:48:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-11-26 11:48:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:10,164 INFO L225 Difference]: With dead ends: 62 [2023-11-26 11:48:10,165 INFO L226 Difference]: Without dead ends: 62 [2023-11-26 11:48:10,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:48:10,166 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:10,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-26 11:48:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-26 11:48:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2023-11-26 11:48:10,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 34 [2023-11-26 11:48:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:10,170 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2023-11-26 11:48:10,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2023-11-26 11:48:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 11:48:10,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:10,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:10,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:10,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:48:10,378 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:10,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637185, now seen corresponding path program 1 times [2023-11-26 11:48:10,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:10,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771787505] [2023-11-26 11:48:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:10,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:10,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 11:48:10,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:10,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771787505] [2023-11-26 11:48:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771787505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:10,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:10,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:48:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554063899] [2023-11-26 11:48:10,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:10,715 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:10,847 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-11-26 11:48:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:48:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-11-26 11:48:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:10,848 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:48:10,849 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 11:48:10,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:10,849 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:10,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 181 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 11:48:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-26 11:48:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-11-26 11:48:10,852 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 35 [2023-11-26 11:48:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:10,853 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-11-26 11:48:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-11-26 11:48:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 11:48:10,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:10,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:10,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:48:10,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:10,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1749246771, now seen corresponding path program 1 times [2023-11-26 11:48:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543459701] [2023-11-26 11:48:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:48:11,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543459701] [2023-11-26 11:48:11,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543459701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:11,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:11,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:48:11,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143263439] [2023-11-26 11:48:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:11,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:11,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:11,220 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:11,332 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-11-26 11:48:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:48:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-11-26 11:48:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:11,334 INFO L225 Difference]: With dead ends: 59 [2023-11-26 11:48:11,334 INFO L226 Difference]: Without dead ends: 59 [2023-11-26 11:48:11,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:48:11,334 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:11,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-26 11:48:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-26 11:48:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2023-11-26 11:48:11,338 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2023-11-26 11:48:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:11,338 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2023-11-26 11:48:11,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2023-11-26 11:48:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:48:11,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:11,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:48:11,339 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:11,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1694035612, now seen corresponding path program 1 times [2023-11-26 11:48:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:11,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297369548] [2023-11-26 11:48:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 11:48:11,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297369548] [2023-11-26 11:48:11,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297369548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36769086] [2023-11-26 11:48:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:11,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:11,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:11,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:11,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:48:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:11,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:48:11,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:11,872 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 3 [2023-11-26 11:48:11,890 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-26 11:48:11,932 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-26 11:48:11,933 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 23 treesize of output 24 [2023-11-26 11:48:11,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:48:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:11,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:11,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36769086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:11,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:11,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2023-11-26 11:48:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678753588] [2023-11-26 11:48:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:11,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=57, Unknown=1, NotChecked=14, Total=90 [2023-11-26 11:48:11,962 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:12,093 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2023-11-26 11:48:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-11-26 11:48:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:12,095 INFO L225 Difference]: With dead ends: 108 [2023-11-26 11:48:12,095 INFO L226 Difference]: Without dead ends: 108 [2023-11-26 11:48:12,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=71, Unknown=1, NotChecked=16, Total=110 [2023-11-26 11:48:12,096 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 76 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:12,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 134 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2023-11-26 11:48:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-26 11:48:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 62. [2023-11-26 11:48:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 56 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-11-26 11:48:12,100 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 38 [2023-11-26 11:48:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:12,100 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-11-26 11:48:12,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:48:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-11-26 11:48:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:48:12,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:12,101 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:12,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:12,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:12,314 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:12,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:12,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1694035613, now seen corresponding path program 1 times [2023-11-26 11:48:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:12,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591814704] [2023-11-26 11:48:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:48:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591814704] [2023-11-26 11:48:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591814704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136888708] [2023-11-26 11:48:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:12,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:12,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:12,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:12,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:48:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:13,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 11:48:13,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:13,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:48:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:48:13,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:13,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:48:13,847 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 33 treesize of output 37 [2023-11-26 11:48:14,057 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 8 treesize of output 4 [2023-11-26 11:48:14,061 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 18 treesize of output 10 [2023-11-26 11:48:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 11:48:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136888708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:14,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:14,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 28 [2023-11-26 11:48:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173835417] [2023-11-26 11:48:14,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:14,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 11:48:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 11:48:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:48:14,122 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 29 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 11:48:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:14,981 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2023-11-26 11:48:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:48:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2023-11-26 11:48:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:14,983 INFO L225 Difference]: With dead ends: 117 [2023-11-26 11:48:14,983 INFO L226 Difference]: Without dead ends: 117 [2023-11-26 11:48:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2023-11-26 11:48:14,985 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 160 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:14,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 542 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:48:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-26 11:48:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 63. [2023-11-26 11:48:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-11-26 11:48:14,988 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 38 [2023-11-26 11:48:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:14,989 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-11-26 11:48:14,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 11:48:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-11-26 11:48:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:48:14,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:14,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:15,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:15,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-26 11:48:15,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:15,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1841798972, now seen corresponding path program 1 times [2023-11-26 11:48:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093790773] [2023-11-26 11:48:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:48:15,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:15,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093790773] [2023-11-26 11:48:15,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093790773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:15,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519813142] [2023-11-26 11:48:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:15,604 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:15,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:48:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:15,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:48:15,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:16,112 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 16 treesize of output 8 [2023-11-26 11:48:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:48:16,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:16,192 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 8 treesize of output 4 [2023-11-26 11:48:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:48:16,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519813142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:16,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:16,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 20 [2023-11-26 11:48:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058597112] [2023-11-26 11:48:16,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:16,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:48:16,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:48:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:48:16,234 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 11:48:20,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:24,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:28,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:32,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:36,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:40,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:40,766 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-11-26 11:48:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:48:40,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2023-11-26 11:48:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:40,768 INFO L225 Difference]: With dead ends: 60 [2023-11-26 11:48:40,768 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 11:48:40,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:48:40,769 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:40,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 427 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 6 Unknown, 0 Unchecked, 24.3s Time] [2023-11-26 11:48:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 11:48:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-26 11:48:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 54 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2023-11-26 11:48:40,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 38 [2023-11-26 11:48:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:40,773 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2023-11-26 11:48:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 11:48:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-11-26 11:48:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 11:48:40,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:40,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:40,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:40,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-26 11:48:40,981 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:40,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1148038422, now seen corresponding path program 1 times [2023-11-26 11:48:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:40,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272645980] [2023-11-26 11:48:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:41,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:41,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272645980] [2023-11-26 11:48:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272645980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125822704] [2023-11-26 11:48:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:41,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:41,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:41,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:41,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:48:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:41,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:48:41,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:41,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125822704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:41,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-26 11:48:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644510511] [2023-11-26 11:48:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:41,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:48:41,587 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:41,632 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-11-26 11:48:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-11-26 11:48:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:41,634 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:48:41,634 INFO L226 Difference]: Without dead ends: 66 [2023-11-26 11:48:41,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:48:41,636 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:41,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 77 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-26 11:48:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-11-26 11:48:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:48:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-11-26 11:48:41,640 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 41 [2023-11-26 11:48:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:41,640 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-11-26 11:48:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:48:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-11-26 11:48:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 11:48:41,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:41,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:41,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:41,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:48:41,849 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-26 11:48:41,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1147942992, now seen corresponding path program 1 times [2023-11-26 11:48:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:41,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400663753] [2023-11-26 11:48:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 11:48:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:48:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:48:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:42,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400663753] [2023-11-26 11:48:42,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400663753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257624247] [2023-11-26 11:48:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:42,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:42,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:42,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51e43a3-569a-405c-a665-a03ed49f5ceb/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:48:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:48:42,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:42,533 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 16 treesize of output 8 [2023-11-26 11:48:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:48:42,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257624247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:42,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:42,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 11 [2023-11-26 11:48:42,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864002871] [2023-11-26 11:48:42,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:42,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:48:42,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:42,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:48:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:48:42,601 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:48:46,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:48:50,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]